Crenoptychoptera gaoi, LIU & HUANG, 2021

LIU, YU-MING & HUANG, DI-YING, 2021, A new species of Crenoptychoptera Kalugina, 1985 (Diptera: Ptychopteridae) from the Middle-Late Jurassic of Jiyuan Basin, China, Palaeoentomology 4 (1), pp. 27-29 : 28

Crenoptychoptera gaoi sp. nov.

( Fig. 1 )

Material. Holotype ( NIGP174354 ), a nearly complete right wing.

Etymology. The specific epithet is dedicated to Jian Gao, who collected the holotype of the species.

3+4 3+4

Diagnosis. Wing with typical Crenoptychoptera venation. Sc ending proximal to the furcation of R 4+5; darken area occupying half-length of R 1, reaching level of r-m; R 1+2 considerably short, ca. twice length of R 2; R 2 slightly anteriorly curved at its apex; apical part of R 3, R 4 and R 5 posteriorly curved; crossvein m-m nearly perpendicular to M; m-cu and bM of equal lengths.

Type locality and horizon. Yangshuzhuang Formation near Anyao Village , Chengliu Township, Jiyuan City, Henan Province, China; earliest Late Jurassic.

Description. Wing 14.2 mm long, 2.9 mm wide (as preserved). Pterostigma along distal part of R 1 and R 2. Base of Rs at 20% of wing length, length of Rs approximately 1.4× length of R 4+5 stem; R 3 about 0.7× length of R 2+3; R 4+5 ramified symmetrically, R 4 parallel with R 5 in whole length, R 4 and R 5 about twice as long as R 4+5. Crossvein r-m connected with Rs, slightly distal to bifurcation of R 3 and R 4+5 and located at same level with m–cu. Discal cell long and narrow, about five times as long as wide. M 1+ 2 in straight prolongation of M stem, M 1 and M 2 thinner and paler than other veins; crossvein m-m slightly curved, joining M 2 close to its base. Anal area partly preserved.

Figures

FIGURE 1. Crenoptychoptera gaoi sp. nov., Holotype NIGP174354). A, Photograph. B, Line drawing. Scale bars = 2 mm.