Enspeletoma Rasnitsyn & Wedmann, 2024

Sun, Chenhui, Rasnitsyn, Alexandr P., Wedmann, Sonja, Zhuang, Jialiang, Shih, Chungkun, Ren, Dong & Gao, 2024, Revisions * new taxa * and venation transformations of the sawfly family Blasticotomidae sensu lato (Hymenoptera: ºenthredinoidea) highlight the evolution of the basal Hymenoptera, Zoological Journal of the Linnean Society 202 (1), pp. 1-19 : 3

Enspeletoma Rasnitsyn & Wedmann gen. nov.

Type species: Enspeletoma oligocaenica Rasnitsyn & Wedmann gen. et sp. nov. http://zoobank.org/ urn:lsid:zoobank.org:act:C92A60A4-F156-4903-BCCE-07644EE4140C

Etymology: The first part of the genus name is derived from the type locality Enspel; the second part* ‘-toma’* refers to the type genus Blasticotoma Klug * 1834. Gender feminine.

Included species: Type species only ( Fig. 2A–C ).

Diagnosis: Pterostigma almost as long and wide as cell 1mcu; cell 3rm with veins 2r-rs and 2m-cu opposite each other; vein 2r-m about as long as vein 2r-rs; cell 2mcu relatively short* about as long as cell 1r+2rm.

Remarks: Although known from a fragmentary fossil ( Fig. 2A )* the new genus demonstrates diagnostic characters of the subfamily Blasticotominae as defined above and in the key below. It differs clearly from other genera and particularly from the only other Cenozoic fossil* Paremphytus ostentus Brues * 1908 ( Fig. 2D * E)* in having a huge pterostigma and a very short cell 2mcu ( Fig. 2B * C).

Figures

Figure 2. Cenozoic extinct Blasticotominae.A–C* Enspeletoma oligocaenica. Holotype* NHMMZ PE 1995/9108-LS* sex unknown* Upper Oligocene of Enspel* Germany.A* dorsal view.B* C* line drawings of forewing* reconstructed from both preserved wings* with veins labelled (B) and with cells labelled (C). D* E* Paremphytus ostentus. Holotype No. 2042* Museum of Comparative Zoology* Harvard University* Cambridge* MA* USA; female* uppermost Eocene* Colorado* USA. D* dorsal view.E* line drawing (Zhelochovtzev and Rasnitsyn 1972). Scale bars:1 mm.