Choristopsyche asticta, Qiao, Xiao, Shih, Chung Kun, Petrulevicius, Julian F. & Dong, Ren, 2013

Qiao, Xiao, Shih, Chung Kun, Petrulevicius, Julian F. & Dong, Ren, 2013, Fossils from the Middle Jurassic of China shed light on morphology of Choristopsychidae (Insecta, Mecoptera), ZooKeys 318, pp. 91-111 : 97-99

Choristopsyche asticta sp. n. Fig. 4

Diagnosis.

Forewing, RP+MA forking basal to MP forking.

Description.

Holotype, CNU-MEC-NN2009394p/c (Figs 4 A–D), an almost complete specimen, female, with well-preserved four outspread wings. Head: compound eyes are big and oval in ventral view, but mouthparts invisible and antenna partially preserved. Thorax: prothorax smaller than mesothorax and metathorax, visible in ventral view. Legs: all legs nearly the same shape and nearly completely preserved, long and slender in ventral view. Abdomen: slender and elongate, tapering apically, with eight visible segments. Wings: four wings are elongated and broad, with rounded apical margin. Forewings: Right forewing, length 20.7 mm, width 10.2 mm, almost triangular, dark color between C and RA; RP forking basal to the forking of MA; MP2+3 forking at about the same level to the forking of MA; the stem of MP3 about twice as long as the stem of MP2+3; the stem of MA strongly bent posteriorly; and the stem of MP2+3 strongly bent at its basal one third part; with one crossvein between MA and MP1, MP1 and MP2, and between MP2+3 and MP4; and one oblique crossvein between the base of CuA and CuP, and at the point one oblique crossvein between CuP and 1A, CuP, 1A, 2A single. Left forewing is similar to right forewing. Hind wings: similar to forewing, but slightly smaller, length at about 16.8 mm, width at about 10.0 mm; Right hind wing, with one crossvein between RA and RP+MA. Left hind wing is similar to right hind wing. No spots on entire wings.

Paratypes: CNU-MEC-NN2011081 (Fig. 4E), female, a well-preserved specimen, with complete body and wings; Head, oval with two big compound eyes, filiform antenna and chewing mouthparts; Abdomen, slender and elongate in lateral view, tapering apically and complete preserved, length at about 13.4 mm; Wings, forewings overlapping some parts of hind wings, and with clear venation; Forewing, length 19.8 mm, width 8.4 mm, RP forking basal to the forking of MA; MP2+3 forking at the same level to the forking of MA; the stem of MP3 about twice as long as the stem of MP2+3. Hind wing, length at about 16.6 mm, width 8.1 mm. CNU-MEC-NN2011086 (Fig. 4F), female, an fairly well-preserved specimen in dorsal view, forewings overlapping hind wings, with almost complete body; Forewing, length 20.8 mm, width at about 9.4 mm; RP forking basal to the forking of MA; MP2+3 forking at the same level to the forking of MA; the stem of MP3 about twice as long as the stem of MP2+3. Hind wing, length 17.3 mm, width at about 9.0 mm.

Material.

Holotype CNU-MEC-NN2009394p/c, Paratypes CNU-MEC-NN2011081, CNU-MEC-NN2011086, deposited in CNUB.

Type locality and horizon.

Daohugou Village, Ningcheng County, Inner Mongolia, China, Jiulongshan Formation, Middle Jurassic (Bathonian-Callovian boundary interval, ca 164-165 Ma).

Etymology.

The name is derived from the Latin word of astictus, meaning "no spots".