Khutelia jarzembowskii Sukatsheva & Sinitshenkova, 2022

SUKATSHEVA, IRINA D. & SINITSHENKOVA, NINA D., 2022, A new caddisfly of the family Baissoferidae (Insecta: Trichoptera) from the Lower Cretaceous of Mongolia, Palaeoentomology 5 (3), pp. 285-288 : 287-288

Khutelia jarzembowskii Sukatsheva & Sinitshenkova , sp. nov.

( Fig. 1 )

Type material. Holotype-PIN, no. 3965/324 , positive imprint of nearly complete fore wing.

Etymology. The species is named for the famous English palaeontomologist E.A. Jarzembowski.

Locality and horizon. The locality Khutel-Khara, East Gobi Aimag, Mongolia; Lower Tsagan Tsab Subformation, Tsagan Tsab Formation, Lower Cretaceous.

Description. Forewing rather narrow, 2.6 times as long as wide. Wing apex broadly rounded. Wing at middle of third quarter of wing length, proximal to CuA 2 apex. SC area narrow, R long, slightly curved at the apex. DC cell closed by straight transverse crossvein rs 1+2 - rs 3+4. Fork F 2 pedunculate, 1.2 times as long as its trunk. RS branching slightly proximal to middle of second quarter of wing length. M branching significantly distal to that of RS, slightly proximal to midwing. RS branches slightly proximal to middle of second quarter of wing length. Cross vein rs 3+4 -m 1+2 straight, located proximal to apex of the F 3 fork. MC cell closed by straight transverse crossvein m 2 -m 3+4. F 3 trunk 1.8 times shorter than its bifurcation. F 3 fork long and wide. F 5 fork long, with apex at wing mid-length. CuP and A 1 ending at wing posterior margin close to each other, slightly distal to wing mid-length. Crossvein cua 2 -cup rather long, straight. A 1 2.7 times as long as A 2. A 3 very short.

Measurements. Holotype, almost complete forewing, length 9.7 mm, width 3.7 mm.

Remarks. The basal part of the F 2 fork is well preserved, but due to the deformation of the wing, it is impossible to trace the RS 3 vein to the wing margin.

Key to genera of the family Baissoferidae (by forewing venation):

1(2) CuP does not form a bend before flowing into the hind wing margin......................... Baissoferus Sukatsheva, 1968 (Middle and Upper Jurassic and Lower Cretaceous of Transbaikalia and Mongolia)

2(1) CuP forms a bend before flowing into the hind wing margin.

3(4) CuP bend sharp..... Pardoperus Sukatsheva & Aristov, 2022 (Upper Jurassic–Lower Cretaceous of Transbaikalia)

4(3) CuR bend smooth.................................................................. ................ Khutelia Sukatsheva & Sinitshenkova , gen. nov. (Lower Cretaceous of Mongolia, Khutel-Khara)

Figures

FIGURE 1. Khutelia jarzembowskii gen. et sp. nov. A, Photograph, B, Forewing. Holotype PIN no. 3965/324, locality Khutel- Khara, East Gobi Aimag, Mongolia; Lower Cretaceous, Tsagan Tsab Formation, Lower Tsagan Tsab Subformation.