Baissoleon cretaceus gen. and sp. nov. Fossil Neuroptera
from the Lower Cretaceous of Baisa, East Siberia.
2. Nymphitidae
Vladimir N. MAKARKIN
Institute of Biology and Pedology, Far Eastern Division of the USSR Academy of Sciences, Vladivostok-22, USSR
The family Nymphitidae Handlirsch, 1906 was considered to contain six gênera (Martynova, 1962): Sialium Westwood, 1854, Nymphites Haase, 1890, Chrysoleonites Martynov, 1925, Mesonymphes Carpenter, 1929, Epigambria Handlirsch, 1939, and Sojuta Martynova, 1958. Of thèse Sojuta is now placed within the Osmylidae (Makarkin, 1989), and Mesonymphes belongs for certain to the Nymphidae. Of four rest gênera only Chryso- leonites is satisfactorily described. However, this genus was recently placed by Panfilov (1980) within the Mesochrysopidae Handlirsch, 1906. A dependable classification of thèse families can be made only after a study of the type spécimens of the gênera Nymphites and Mesochrysopa Handlirsch, 1906.
A new genus described below is considered to belong to the Nymphitidae. But it is also related in some respects to the gênera of the Mesochrysopidae. Up to présent, the Nymphitidae hâve been restricted to the Jurassic of Britain, Germany and USSR (Kazakhstan).
Family Nymphitidae Handlirsch, 1906 Genus Baissoleon Makarkin, gen. nov.
Type species: Baissoleon cretaceus, sp. nov.
Description: Wings narrow. Costal area relatively narrow. Subcostal veinlets unforked proximal to the pterostigma and forked distal to the pterostigma. Pterostigma destinct. Se fused with R apically, Sc+R ending on costal margin near wing apex. No cross-veins between Se and R présent. Rs arising close to the base of the wings. First branch of Rs arising at about middle of the wing length. MP forked distally at about one-fourth of the wing length. CuA relatively long with a séries of short terminal branches to the hind margin of the wing. CuP short. A] for- ked. There are a number of cross-veins between the longitudinal veins. In the hind wing MP for- ked close to the wing base and CuA shorter than in the fore wing.
Comparison: Baissoleon is closely related to the genus Chrysoleonites, but differs from it by MP in the fore wing forked more distal and by CuA longer. Moreover a cross- veins between the branches of MP are absent in the Chrysoleonites. A new genus differs from the Nymphites by CuA in the hind wing longer and by MP provided with fewer ter- minal branches to the wing margin.
Species included: Only the type species.
Baissoleon cretaceus Makarkin Holotype: Spécimen N 1989/54; Paleontological Institute, Moscow; almost com- plète fore and hind wings, overlying each other.
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