Introduction:

Zadiprion Rohwer is a genus of sawflies including seven species that cause defoliations in coniferous forests.

Objective:

To determine the species of Zadiprion sawflies infesting Pinus cembroides (Zucc.) in Miquihuana, Tamaulipas.

Materials and methods:

Biological material was collected from sawfly larvae. Part of the material was preserved in 70 % alcohol for morphological description, another in 96 % anhydrous alcohol for molecular identification and another portion was placed in a Binder 720 KBW E5.1 to complete the biological cycle and obtain adults. The ovipositor of the female and phenology during five years were described.

Results and discussion:

The sawfly larva has an orange-brown head with a small circular eyestalk, a longitudinal brown spot on the dorsum, two white lines on the sides and a dark subdorsal stripe. The female is light yellow with dark sutures on the thorax. The lancet of the ovipositor has nine rings; the first is inverted “U” shaped. Males are mainly black with yellowish legs and a yellowish-brown spot in the postocellar area; there is no yellowish-brown pronotum or tegula and the harpes are rounded and pale at the apex. The population is different from Z. rohweri (Middleton) and Z. jeffreyi (Smith), reported in GenBank; however, they are related.

Conclusion:

The sawfly under study is a new species and was recorded as Zadiprion borjai sp. nov. (GenBank: ON181557).

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