Belmophenopterum rasnitsyni Storozhenko et Aristov, 2021

Storozhenko, S. Yu. & Aristov, D. S., 2021, The latest record of the genus Belmophenopterum (Eoblattida: Mesorthopteridae) from the Middle Triassic of Kyrgyzstan, Far Eastern Entomologist 437, pp. 31-36 : 33-35

Belmophenopterum rasnitsyni Storozhenko et Aristov , sp. n.

http://zoobank.org/NomenclaturalActs/ 3E09BFC1-9A90-4E57-942E-D58F8E19B8D2

Figs 3–5

MATERIAL. Holotype – PIN no. 2555/820, counterpart of a forewing shorten as a result of enclosing rock deformation; Kyrgyzstan: Osh Region, Batken District, Madygen Stow ,

Madygen locality; Middle Triassic, Ladinian-Carnian Stage, Madygen Formation.

DESCRIPTION. Forewing medium size. Anterior margin of wing convex. Costal area near origin of RS slightly wider than subcostal one. SC reaching anterior margin of wing before distal third of wing, with 12 usually simple or rare Y-shaped veinlets. RS originated from R before the middle of wing, with 3 or more branches directed to apex and posterior margin of wing. M divided into MA and MP in the basal quarter of wing; MA with 3 branches;

MP desclerotized at the middle of wing, with 3 branches. CuA with 5 branches directed to posterior margin of wing. Area between CuP and A 1 very wide. A 1 with 3 weak apical branches; A 2 disappear within veinlets.

MEASUREMENTS. Length of forewing about 18 mm.

DIAGNOSIS. The new species is similar to B. pectinatum but differs from latter by RS

originated from R before the middle of wing and by both MA and MP forked before the distal quarter of wing (in B. pectinatum RS originated from R in basal quarter of wing and both MA and MP simple before the distal quarter of wing).

ETYMOLOGY. The new species is named in honor of the famous Russian paleoentomo-

logist Prof. Alexandr P. Rasnitsyn.

Figures

Figs 3–5. Belmophenopterum rasnitsyni sp. n. (holotype, PIN no. 2555/820, forewing; Kyrgyzstan: Osh Region, Batken District, Madygen Stow, Madygen locality; Middle Triassic, Ladinian-Carnian Stage, Madygen Formation): 3 – photograph; 4 – drawing; 5 – reconstruction.