<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1026-8774</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias geológicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. cienc. geol]]></abbrev-journal-title>
<issn>1026-8774</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1026-87742005000100024</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Braquiópodos y trilobite del Pérmico Inferior del noroeste del Estado de Hidalgo, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Lower Permian brachiopods and trilobite from northwerstern Hidalgo State, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sour-Tovar]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Huerta]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quiroz-Barroso]]></surname>
<given-names><![CDATA[Sara A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Centeno-García]]></surname>
<given-names><![CDATA[Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Museo de Paleontología, Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of Oregon Department of Geological Sciences ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2005</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2005</year>
</pub-date>
<volume>22</volume>
<numero>1</numero>
<fpage>24</fpage>
<lpage>35</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1026-87742005000100024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1026-87742005000100024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1026-87742005000100024&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los braquiópodos Krotovia sp., Dasysaria sp., Derbyoides cf. D. dunbari, Neospirifer cf. N. amphigyus, Neospirifer sp., Spiriferellina tricosa y ?Holosia sp. y el trilobite Anisopyge whitei son descritos para rocas del Pérmico Inferior (Wolfcampiano-Leonardiano) de la región de Otlamalacatla, en el noroeste del Estado de Hidalgo. Estos taxa tienen afinidad principalmente con faunas del Pérmico del oeste de Texas y en su mayoría se registran por primera vez para México. La asociación fósil se redepositó dentro de un flujo de detritos derivados de un ambiente marino somero, ligado a un arco magmático submarino, el cual se desarrolló sobre corteza continental en la región oriental de México, durante el Pérmico temprano.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The brachiopods Krotovia sp., Dasysaria sp., Derbyoides cf. D. dunbari, Neospirifer cf. N. amphigyus, Neospirifer sp., Spiriferellina tricosa and ?Holosia sp., and the trilobite Anisopyge whitei are described from Lower Permian (Wolfcampian-Leonardian) rocks from Otlamalacatla region, northwest of Hidalgo State. The association is similar to Permian faunas from west Texas and almost all these taxa are recorded for the first time in Mexico. These faunas were reworked and deposited by turbiditic flows that remobilized shallow marine deposits in the context of a submarine volcanic arc, which developed on continental crust of eastern Mexico during early Permian times.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[braquiópodos]]></kwd>
<kwd lng="es"><![CDATA[trilobites]]></kwd>
<kwd lng="es"><![CDATA[Pérmico]]></kwd>
<kwd lng="es"><![CDATA[Hidalgo]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="en"><![CDATA[brachiopods]]></kwd>
<kwd lng="en"><![CDATA[trilobites]]></kwd>
<kwd lng="en"><![CDATA[Lower Permian]]></kwd>
<kwd lng="en"><![CDATA[Hidalgo]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arellano-Gil]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Vachard]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Yussim]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Flores de Dios-González]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[estratigráficos, estructurales y paleogeográficos del Pérmico inferior al Jurásico Inferior en Pemuxco, Estado de Hidalgo, México]]></article-title>
<source><![CDATA[Revista Mexicana de Ciencias Geológicas]]></source>
<year>1998</year>
<volume>15</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>9-13</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brezinski]]></surname>
<given-names><![CDATA[D.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Permian trilobites from the San Andres Formation, New Mexico, and their relationship to species from the Kaibab Formation of Arizona]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>1991</year>
<volume>65</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>480-4</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brezinski]]></surname>
<given-names><![CDATA[D.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Permian trilobites from West Texas]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>1992</year>
<volume>66</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>924-43</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brezinski]]></surname>
<given-names><![CDATA[D.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The rise and fall of Late Paleozoic trilobites of the United States]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>1999</year>
<volume>73</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>164-75</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brunton]]></surname>
<given-names><![CDATA[C.H.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lazarev]]></surname>
<given-names><![CDATA[S.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A review and new classification of the brachiopod order Productida]]></article-title>
<source><![CDATA[Palaeontology]]></source>
<year>1995</year>
<volume>38</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>915-36</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brunton]]></surname>
<given-names><![CDATA[C.H.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lazarev]]></surname>
<given-names><![CDATA[S.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Jin]]></surname>
<given-names><![CDATA[Y-G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Productidina]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Kaesler]]></surname>
<given-names><![CDATA[R.L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Treatise on Invertebrate Paleontology, Part H, Brachiopoda (revised)]]></source>
<year>2000</year>
<volume>3</volume>
<page-range>424-609</page-range><publisher-name><![CDATA[Geological Society of America Boulder, University of Kansas Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Buitrón]]></surname>
<given-names><![CDATA[B.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Patiño-Ruiz]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno-Cano]]></surname>
<given-names><![CDATA[L.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Crinoides del Paleozoico tardío (Pensilvánico) de Calnali, Hidalgo]]></article-title>
<source><![CDATA[Revista de la Sociedad Mexicana de Paleontología]]></source>
<year>1987</year>
<volume>1</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>125-36</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carter]]></surname>
<given-names><![CDATA[J.L.]]></given-names>
</name>
<name>
<surname><![CDATA[Johnson]]></surname>
<given-names><![CDATA[J.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Gourvennec]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hou]]></surname>
<given-names><![CDATA[H.-F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A revised classification of the spiriferid brachiopods]]></article-title>
<source><![CDATA[Annals of Carnegie Museum]]></source>
<year>1994</year>
<volume>63</volume>
<page-range>27-374</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carrillo-Bravo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio geológico de una parte del Anticlinorio de Huayacocotla]]></article-title>
<source><![CDATA[Boletín de la Asociación Mexicana de Geólogos Petroleros]]></source>
<year>1965</year>
<volume>12</volume>
<numero>5-6</numero>
<issue>5-6</issue>
<page-range>1-73</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Centeno-García]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Ochoa-Carrillo]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Sour-Tovar]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Permian volcanism in Eastern Mexico, preliminary report]]></source>
<year>1995</year>
<publisher-loc><![CDATA[New Orleans Lousiana, U.S.A ]]></publisher-loc>
<publisher-name><![CDATA[Geological Society of America]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chamberlain]]></surname>
<given-names><![CDATA[C.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Permian trilobites species from central Wyoming and west Texas]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>1970</year>
<volume>44</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1049-54</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cisne]]></surname>
<given-names><![CDATA[J.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Paleoecology of trilobites of the Kaibab Limestone (Permian) in Arizona, Utah and Nevada]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>1971</year>
<volume>45</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>525-33</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cooper]]></surname>
<given-names><![CDATA[G.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Correction of a brachiopod name]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>1972</year>
<volume>46</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>450</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cooper]]></surname>
<given-names><![CDATA[G.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[New Permian Brachiopoda from West Texas]]></article-title>
<source><![CDATA[Smithsonian Contributions to Paleobiology]]></source>
<year>1969</year>
<volume>1</volume>
<page-range>1-20</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cooper]]></surname>
<given-names><![CDATA[G.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[R.E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Permian brachiopods of West Texas, II]]></article-title>
<source><![CDATA[Smithsonian Contributions to Paleobiology]]></source>
<year>1974</year>
<volume>15</volume>
<page-range>233-793</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cooper]]></surname>
<given-names><![CDATA[G.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Permian brachiopods of West Texas, III]]></article-title>
<source><![CDATA[Smithsonian Contributions to Paleobiology]]></source>
<year>1975</year>
<volume>19</volume>
<page-range>795-1298</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cooper]]></surname>
<given-names><![CDATA[G.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Permian brachiopods of West Texas, V]]></article-title>
<source><![CDATA[Smithsonian Contributions to Paleobiology]]></source>
<year>1976</year>
<volume>24</volume>
<page-range>2609-3159</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cooper]]></surname>
<given-names><![CDATA[G.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Muir-Wood]]></surname>
<given-names><![CDATA[H.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Brachiopod homonyms]]></article-title>
<source><![CDATA[Washington Academy of Science Journal]]></source>
<year>1951</year>
<volume>41</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>195-6</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dagys]]></surname>
<given-names><![CDATA[A.S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Yavleniya metakhoreza sredi triasovykh spiriferinid. Problemy paleozoogeografii mezozoya Sibiri]]></article-title>
<source><![CDATA[Trudy Instituta Geologii i Geofiziki (Novosibirsk)]]></source>
<year>1972</year>
<volume>111</volume>
<page-range>34-44</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Duméril]]></surname>
<given-names><![CDATA[A.M.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Zoologie analytique ou méthode naturalle de classification des animaux]]></source>
<year>1806</year>
<page-range>344</page-range><publisher-loc><![CDATA[Allais ]]></publisher-loc>
<publisher-name><![CDATA[Paris]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dunbar]]></surname>
<given-names><![CDATA[C.O.]]></given-names>
</name>
<name>
<surname><![CDATA[Condra]]></surname>
<given-names><![CDATA[G.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Brachiopoda of the Pennsylvanian System in Nebraska]]></article-title>
<source><![CDATA[Nebraska Geological Survey Bulletin]]></source>
<year>1932</year>
<volume>5</volume>
<page-range>1-377</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fischer de Waldheim]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quelques fossiles du gouvernement de Moscou]]></article-title>
<source><![CDATA[Société Impériale des Naturalistes de Moscou Bulletin]]></source>
<year>1829</year>
<volume>1</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>375-6</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fortey]]></surname>
<given-names><![CDATA[R.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Trilobites systematics; The last 75 years]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>2001</year>
<volume>75</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1141-51</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fortey]]></surname>
<given-names><![CDATA[R.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Owens]]></surname>
<given-names><![CDATA[R.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Proetida, a new Order of Trilobites]]></article-title>
<source><![CDATA[Fossils and Strata]]></source>
<year>1975</year>
<volume>4</volume>
<page-range>227-39</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fredericks]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Über einige oberpaläozoic Brachiopoden von Eurasien [Paleontological notes on some Upper Paleozoic Brachiopoda of Eurasia]]]></article-title>
<source><![CDATA[Comité Géologique, Mémoires]]></source>
<year>1916</year>
<volume>156</volume>
<page-range>1-87</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fredericks]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[O Verkhne-Kammennougol&#8217;nykh spiriferidakh Urala [On Upper Carboniferous spiriferids from the Urals]]]></article-title>
<source><![CDATA[Geologicheskago Komiteta Izvestiya]]></source>
<year>1924</year>
<volume>38</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>295-324</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fredericks]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Materialy dlya klassifikatsii roda Productus Sow [Contribution to the classification of the genus Productus Sowerby]]]></article-title>
<source><![CDATA[Izvestiia Geologicheskago Komiteta, Leningrad]]></source>
<year>1928</year>
<volume>46</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>773-92</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Girty]]></surname>
<given-names><![CDATA[G.H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Guadalupian fauna]]></article-title>
<source><![CDATA[United States Geological Survey, Professional Paper]]></source>
<year>1908</year>
<volume>58</volume>
<page-range>651</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Girty]]></surname>
<given-names><![CDATA[G.H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Paleontology]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[W.T.]]></given-names>
</name>
<name>
<surname><![CDATA[Girty]]></surname>
<given-names><![CDATA[G.H.]]></given-names>
</name>
</person-group>
<source><![CDATA[United States Geological Survey Bulletin]]></source>
<year>1909</year>
<volume>389</volume>
<page-range>41-141</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gray]]></surname>
<given-names><![CDATA[J.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Synopsis of the contents of the British Museum]]></source>
<year>1840</year>
<edition>42th</edition>
<page-range>370</page-range><publisher-loc><![CDATA[Londres ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hahn]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Hahn]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Zur Phylogenie der proetidae (Trilobita) des Karbons und Perms]]></article-title>
<source><![CDATA[Zoologische Beiträge]]></source>
<year>1967</year>
<volume>13</volume>
<page-range>303-49</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ivanova]]></surname>
<given-names><![CDATA[E.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Osnovnyye zakonomernosti evolyutsii spiriferid (Brachiopoda) [Main features of spiriferid evolution (Brachiopoda)]]]></article-title>
<source><![CDATA[Paleontologicheskii Zhurnal]]></source>
<year>1972</year>
<volume>3</volume>
<page-range>28-42</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[King]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Geology of the Glass Mountains, Texas, part II Faunal summary and correlation of the Permian formations with description of Brachiopoda]]></article-title>
<source><![CDATA[University of Texas Bulletin]]></source>
<year>1931</year>
<volume>3042</volume>
<page-range>1-245</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[King]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Remarks on certain genera belonging to the class Palliobranchiata]]></article-title>
<source><![CDATA[Annals and Magazine of Natural History]]></source>
<year>1846</year>
<volume>18</volume>
<numero>26-42</numero>
<issue>26-42</issue>
<page-range>83-94</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kuhn]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Stuttgart]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Lehrbuch der Paläozoologie]]></source>
<year>1949</year>
<page-range>326</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Likharev]]></surname>
<given-names><![CDATA[B.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Brachiopoda]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Kiparisova]]></surname>
<given-names><![CDATA[L.D.]]></given-names>
</name>
<name>
<surname><![CDATA[Markovsky]]></surname>
<given-names><![CDATA[B.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Radchenko]]></surname>
<given-names><![CDATA[G.P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontologicheskoe]]></source>
<year>1956</year>
<volume>12</volume>
<page-range>56-61</page-range></nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez-Pérez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio geológico de una porción de la Sierra Madre Oriental al oriente de Zacualtipán y Tianguistengo, Hidalgo]]></source>
<year>1962</year>
<page-range>47</page-range><publisher-loc><![CDATA[D. F. ]]></publisher-loc>
<publisher-name><![CDATA[México, Instituto Politécnico Nacional, Escuela Superior de Ingeniería y Arquitectura]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moreno-Cano]]></surname>
<given-names><![CDATA[L.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Patiño-Ruiz]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio del Paleozoico en la región de Calnali, Hidalgo (en la Sierra Madre Oriental), México]]></source>
<year>1981</year>
<page-range>30</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[D.F., Instituto Politécnico Nacional, Escuela Superior de Ingeniería y Arquitectura]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muir-Wood]]></surname>
<given-names><![CDATA[H.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Cooper]]></surname>
<given-names><![CDATA[G.A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Morphology, classification and life habits of the Productoidea (Brachiopoda)]]></article-title>
<source><![CDATA[Geological Society of America, Memoir]]></source>
<year>1960</year>
<volume>81</volume>
<page-range>447</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[North]]></surname>
<given-names><![CDATA[F.J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On Syringothyris Winchell and certain Carboniferous Brachiopoda referred to Spiriferina d&#8217;Orbigny]]></article-title>
<source><![CDATA[Geological Society of London, Quarterly Journal]]></source>
<year>1920</year>
<volume>76</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>162-227</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ochoa-Camarillo]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geología del Anticlinorio de Huayacocotla en la región de Molango, Estado de Hidalgo]]></source>
<year>1996</year>
<page-range>91</page-range><publisher-loc><![CDATA[D.F. ]]></publisher-loc>
<publisher-name><![CDATA[México, Universidad Nacional Autónoma de México, Facultad de Ciencias]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pabian]]></surname>
<given-names><![CDATA[R.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Fagerstrom]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Late Paleozoic Trilobites from Southeastern Nebraska]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>1972</year>
<volume>46</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>789-816</page-range></nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez-Ramos]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio estratigráfico del Paleozoico Superior del Anticlinorio de Huayacocotla, Veracruz]]></source>
<year>1978</year>
<page-range>41</page-range><publisher-name><![CDATA[Instituto Mexicano del Petróleo, Subdirección Técnica de Exploración]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Río-García]]></surname>
<given-names><![CDATA[L.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Chacón]]></surname>
<given-names><![CDATA[M.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Braquiópodos moscovienses del Paquete Levinco (Cuenca Carbonífera Central de Asturias)]]></article-title>
<source><![CDATA[Trabajos de Geología]]></source>
<year>1988</year>
<volume>17</volume>
<page-range>33-56</page-range><publisher-name><![CDATA[Asturias, Universidad de Oviedo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rosales-Lagarde]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estratigrafía y Geoquímica de la secuencia volcano- sedimentaria paleozoica del noreste del Estado de Hidalgo]]></source>
<year>2002</year>
<page-range>89</page-range><publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Universidad naconal Autónoma de México, Posgrado en Ciencias de la Tierra]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rosales-Lagarde]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Centeno]]></surname>
<given-names><![CDATA[G.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Ochoa-Camarillo]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Sour-Tovar]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Permian volcanism eastern Mexico; Preliminary Report]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Gómez-Caballero]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Alcayde-Orraca]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Libro Guía de las Excursiones Geológicas, II Convención sobre la Evolución Geológica de México y Recursos Asociados, Pachuca, Hidalgo]]></source>
<year>1997</year>
<page-range>27-32</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Autónoma del Estado de Hidalgo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Salter]]></surname>
<given-names><![CDATA[J.W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A monograph of British trilobites]]></article-title>
<source><![CDATA[Palaeontographical Society, Monograph]]></source>
<year>1864</year>
<volume>17</volume>
<page-range>83</page-range></nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sarytcheva]]></surname>
<given-names><![CDATA[T.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Sokolskaya]]></surname>
<given-names><![CDATA[A.N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[O klassifikatsii lozhnoporistykh brakhiopod [On the classification of pseudopunctate brachiopods]]]></article-title>
<source><![CDATA[Akademiia Nauk SSSR]]></source>
<year>1959</year>
<volume>125</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>181-4</page-range><publisher-name><![CDATA[Doklady, Moscow]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B49">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Savage]]></surname>
<given-names><![CDATA[N.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Manceñido]]></surname>
<given-names><![CDATA[M.O.]]></given-names>
</name>
<name>
<surname><![CDATA[Owen]]></surname>
<given-names><![CDATA[E.F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Order Rhynchonellida]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Kaesler]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Boulder and Lawrence]]></source>
<year>2002</year>
<page-range>1027-164</page-range><publisher-name><![CDATA[The Geological Society of America, The University of Kansas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B50">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[von Keyserling]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Geognostische Beobachtungen]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Krusenstern]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Keyserling]]></surname>
<given-names><![CDATA[A. von]]></given-names>
</name>
</person-group>
<source><![CDATA[Wissensschaftliche Beobachtungen auf einer Reise in das Petschora-Land]]></source>
<year>1846</year>
<page-range>151-406</page-range><publisher-loc><![CDATA[St. Petersburg ]]></publisher-loc>
<publisher-name><![CDATA[Carl Kray]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B51">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[von Schlotheim]]></surname>
<given-names><![CDATA[E.F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Beiträge zur Naturgeschichte der Versteinerungen in geognostischer Hinsicht]]></source>
<year>1816</year>
<volume>6</volume>
<page-range>13-36</page-range></nlm-citation>
</ref>
<ref id="B52">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schuchert]]></surname>
<given-names><![CDATA[Ch.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Classification of the Brachiopoda]]></article-title>
<source><![CDATA[American Geologist]]></source>
<year>1893</year>
<volume>11</volume>
<page-range>141-67</page-range></nlm-citation>
</ref>
<ref id="B53">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schuchert]]></surname>
<given-names><![CDATA[Ch.]]></given-names>
</name>
<name>
<surname><![CDATA[LeVene]]></surname>
<given-names><![CDATA[C.M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Brachiopoda]]></source>
<year>1929</year>
<page-range>140</page-range><publisher-loc><![CDATA[Berlin ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B54">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shumard]]></surname>
<given-names><![CDATA[B.F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Descriptions of fossils]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Shumard]]></surname>
<given-names><![CDATA[B.F.]]></given-names>
</name>
<name>
<surname><![CDATA[Swallow]]></surname>
<given-names><![CDATA[G.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Descriptions of new fossils from the Coal Measures of Missouri and Kansas]]></source>
<year>1858</year>
<volume>1</volume>
<page-range>198-227</page-range><publisher-name><![CDATA[Academy of Sciences of San Louis Transactions]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B55">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Siebold]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Stannius]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Lehrbuch der Vergleichenden Anatomie der Wirbellosen Thiere]]></source>
<year>1848</year>
<page-range>679</page-range><publisher-loc><![CDATA[Berlin ]]></publisher-loc>
<publisher-name><![CDATA[Veit &amp; Co.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B56">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sowerby]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Mineral Conchology of Great Britain]]></source>
<year>1815</year>
<volume>1</volume>
<page-range>234</page-range><publisher-loc><![CDATA[London ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B57">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stehli]]></surname>
<given-names><![CDATA[F.G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Lower Leonardian Brachiopoda of the Sierra Diablo]]></article-title>
<source><![CDATA[American Museum of Natural History Bulletin]]></source>
<year>1954</year>
<volume>105</volume>
<page-range>257-358</page-range></nlm-citation>
</ref>
<ref id="B58">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vachard]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Arellano]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Buitrón]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Flores de Díos]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Yussim]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Datación del Leonardiano Inferior (Pérmico Inferior) en Pemuxco, Hidalgo; Consecuencias Paleogeográficas]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Gómez-Caballero]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Alcayde-Orraca]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Memorias de la II Convención sobre la Evolución Geológica de México y Recursos Asociados, Pachuca, Hidalgo]]></source>
<year>1997</year>
<publisher-name><![CDATA[Universidad Autónoma del Estado de Hidalgo, Instituto de Investigaciones en Ciencias de la Tierra, Instituto de Geología de la Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B59">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Waagen]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Salt Range fossils, vol. I, part 4. Productus Limestone fossils, Brachiopoda]]></article-title>
<source><![CDATA[Memoirs of the Geological Survey of India]]></source>
<year>1883</year>
<volume>2</volume>
<page-range>391-546</page-range></nlm-citation>
</ref>
<ref id="B60">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Waagen]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Salt Range fossils, vol. I, part 4, Productus Limestone fossils, Brachiopoda]]></article-title>
<source><![CDATA[Memoirs of the Geological Survey of India]]></source>
<year>1884</year>
<volume>3-4</volume>
<page-range>547-728</page-range></nlm-citation>
</ref>
<ref id="B61">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Walch]]></surname>
<given-names><![CDATA[J.E.I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Die Naturgeschichte der Versteinerungen zur Erläuterung der Knorrischen Sammlungen von Merkwürdigkeiten der Natur]]></source>
<year>1771</year>
<page-range>235</page-range></nlm-citation>
</ref>
<ref id="B62">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Waterhouse]]></surname>
<given-names><![CDATA[J.B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The classification and descriptions of Permian Spiriferida (Brachiopoda ) from New Zealand]]></article-title>
<source><![CDATA[Palaeontographica]]></source>
<year>1968</year>
<page-range>94</page-range></nlm-citation>
</ref>
<ref id="B63">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Weller]]></surname>
<given-names><![CDATA[J.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Permian trilobite genera]]></article-title>
<source><![CDATA[Journal of Paleontology]]></source>
<year>1944</year>
<volume>18</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>320-7</page-range></nlm-citation>
</ref>
<ref id="B64">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Whittington]]></surname>
<given-names><![CDATA[H.B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Morphology of the exoskeleton]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Whittington]]></surname>
<given-names><![CDATA[H.B.]]></given-names>
</name>
<name>
<surname><![CDATA[Chatterton]]></surname>
<given-names><![CDATA[B.D.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Speyer]]></surname>
<given-names><![CDATA[S.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Fortey]]></surname>
<given-names><![CDATA[R.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Owens]]></surname>
<given-names><![CDATA[R.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Clarkson]]></surname>
<given-names><![CDATA[E.N.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilmont]]></surname>
<given-names><![CDATA[N.V.]]></given-names>
</name>
<name>
<surname><![CDATA[Kelly]]></surname>
<given-names><![CDATA[S.R.A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Treatise on Invertebrate Paleontology, Part O, Trilobita (revised)]]></source>
<year>1997</year>
<page-range>1-85</page-range><publisher-name><![CDATA[Geological Society of America and University of Kansas Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B65">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Brunton]]></surname>
<given-names><![CDATA[C.H.C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Morphological and anatomical terms applied to brachiopods]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Kaesler]]></surname>
<given-names><![CDATA[R.L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Treatise on Invertebrate Paleontology, Part H, Brachiopoda (revised)]]></source>
<year>1997</year>
<volume>1</volume>
<page-range>423-40</page-range><publisher-name><![CDATA[Geological Society of America, University of Kansas Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B66">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Brunton]]></surname>
<given-names><![CDATA[C.H.C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Orthotetidina]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Kaesler]]></surname>
<given-names><![CDATA[R.L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Treatise on Invertebrate Paleontology, Part H, Brachiopoda (revised)]]></source>
<year>2000</year>
<volume>3</volume>
<page-range>644-81</page-range></nlm-citation>
</ref>
<ref id="B67">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Carlson]]></surname>
<given-names><![CDATA[S.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Brunton]]></surname>
<given-names><![CDATA[C.H.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Holmer]]></surname>
<given-names><![CDATA[L.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Popov]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[A supra-ordinal classification of theBrachiopoda]]></source>
<year>1996</year>
<volume>351</volume>
<page-range>1171-93</page-range><publisher-name><![CDATA[Philosophical Transactions of the Royal Society of London]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
