Parabaisochrysa, Lu & Wang & Ohl & Liu, 2018

Lu, Xiumei, Wang, Bo, Ohl, Michael & Liu, Xingyue, 2018, The first green lacewing (Insecta: Neuroptera: Chrysopidae) from the mid- Cretaceous amber of Myanmar, Zootaxa 4399 (4), pp. 563-570 : 564

Genus Parabaisochrysa gen. nov.

( Figs. 1–2 )

Type species: Parabaisochrysa xingkei sp. nov.

Diagnosis. This new genus is characterized by a series of combinational characters, which is unique in Limaiinae : 1) three complete, well arranged gradate series of crossveins present [shared by Baisochrysa Makarkin, 1997 , but not as complete as the new genus; two gradate series of crossveins present in the other Limaiinae genera]; 2) forewing RA veinlets relatively sparse and simple, except for proximal-most one bifurcated [simple but dense in Mesypochrysa Martynov, 1927 ; several forked RA veinlets present in Baisochrysa and Protochrysa ]; 3) forewing RP+MA stem perpendicular to RA [RP+MA stem forming acute angle with RA in the other Limaiinae genera except Mesypochrysa chrysopa Makarkin, 1997 and Mesypochrysa magna Makarkin, 1997 ]; 4) forewing A1 simple [shared by M. chrysopa , M. intermedia and Protochrysa aphrodite Willmann & Brooks, 1991 ; A1 forked in the rest taxa of Limaiinae ]; 5) MP1 coalescent with stem of RP+MA in hind wing, leaving a single MP2 (= unforked hind wing MP, mentioned in Nel et al. 2005) [shared by some species of Mesypochrysa , including Mesypochrysa criptovenata ( Martins-Neto and Vulcano 1989) , M. magna , M. chrysopa , Mesypochrysa curvimedia Makarkin, 1997 , and Mesypochrysa minuta Jepson et al., 2012 , and also by Paralembochrysa; hind wing MP deeply forked in the other Limaiinae genera].

Etymology. From “ Para- ” (similar) and Baisochrysa (a limaiine genus name of the family Chrysopidae ), in reference to the similar morphological characteristics between the new genus and Baisochrysa . Gender: Feminine.

Remarks. The new genus belongs to the subfamily Limaiinae based on the relatively short ScP merged into C, the long and proximally sharply tapering im cell, the 2m-cu crossvein located at the distal part of im cell, and the distinct Psc. The new genus resembles the limaiine genus Baisochrysa by the presence of three gradate series of crossveins. However, Parabaisochrysa gen. nov. can be easily distinguished from Baisochrysa by the presence of three complete gradate series of crossveins and the hind wing MP1 coalescent with stem of RP+MA, leaving a single MP2. In Baisochrysa the gradate series of crossveins do not reach to the distal-most RP branches, and the median series is obviously short, composed of only three or four crossveins. Besides, the new genus distinctly differs from the most species-rich limaiine genus Mesypochrysa by the presence of three gradate series of crossveins.

Figures

FIGURE1. Photographs of Parabaisochrysaxingkei gen.et sp.nov.,holotype.A.Habitus,lateral view; B. Head,lateral view; C. Proximal part of left forewing; D. Distal part of left forewing; E. Right hind wing. Arrow in B indicates antenna. Scale bar: 1.0 mm.

FIGURE 2. Parabaisochrysa xingkei gen. et sp. nov., holotype.A. Drawing of left forewing with reconstruction; B. Drawing of right forewing; C. Drawing of left hind wing; D. Drawing of right hind wing. Scale bar: 1.0 mm.