Bocchus cenomanianus

Olmi, Massimo, Rasnitsyn, Alexander P. & Guglielmino, Adalgisa, 2010, Revision of rock fossils of Dryinidae and Embolemidae (Hymenoptera: Chrysidoidea), Zootaxa 2499, pp. 21-38 : 28

Bocchus ? cenomanianus Olmi, Rasnitsyn & Guglielmino , n. sp.

Material examined: female holotype, PIN no. 3901 / 133 from Eastern Siberia, Magadan Region, Obeschchayushchiyi fossil site, Upper Cretaceous (Cenomanian), Ola Formation (90–95 mybp).

FEMALE ( Fig. 8 ): length 3.7 mm (only propodeum + gaster; rest of body missing); length of propodeum: 1.06 mm; length of gaster: 2.68 mm. Head, protohorax, mesothorax and metathorax missing. Propodeum with very large areolae, typical of modern Bocchus species. Petiole very short. Wings missing (but the specimen can be apterous or winged). Legs missing, except part of hind legs (coxa (0.50 mm), trochanter (0.12), femur (1.06 mm) and part of tibia are present). Ovipositor present. Tibial spurs not visible.

MALE: unknown.

Remarks: t he head, thorax, antennae, wings, fore legs, mid legs and part of hind legs of this fossil are missing. However, it is possible to identify tentatively this specimen as a female belonging to Bocchus Ashmead, 1893 , because of the large areolae present on the propodeum. Among the extant Dryinids only females of Bocchus may have so large areolae. Of course, large areolae exist also in other groups (mainly among Terebrantia, more rarely in the Aculeates). On the other hand, the shape of the propodeal areolae of B. cenomanianus is typical of Bocchus .

Figures

FIGURE 8. Bocchus? cenomanianus n. sp. (length of propodeum and gaster 3.7 mm)