Kamopanorpa aristovi Sukatsheva & Sinitshenkova, 2023

SUKATSHEVA, IRINA D. & SINITSHENKOVA, NINA D., 2023, A new caddisfly species Kamopanorpa aristovi sp. nov. of the family Microptysmatidae (Insecta, Trichoptera) from the Middle Permian of Udmurtya, Russia, Palaeoentomology 6 (2), pp. 120-123 : 120-121

Kamopanorpa aristovi Sukatsheva & Sinitshenkova sp. nov.

( Fig. 1 )

Holotype. PIN, no 3695/141, part and counterpart of the caddisfly fore wing of good preservation.

Etymology. The new species is named in memory of the late palaeoentomologist Daniil S. Aristov.

Diagnosis. The fore wing of K. aristovi sp. nov. is of medium size, RS and M branching almost at the same level, the fork on R is absent, RS seven-branched.

Locality and horizon. The Kostovaty site, Middle Urals, Udmurtya, right bank of the Kama River, 1.3 km upstream of the Kostovaty village and 6.4 km downstream of the Galevo pier. The deposits of Ilyinskaya Member in Lower Urzhum Formation of Urzhum Horizon are dated to the Middle Permian.

Description. Fore wing rather narrow, length almost three times width, with greatest width at level of SC entering anterior wing margin. Anterior margin straight, apex broadly rounded. SC long, straight, ending in middle of third quarter of wing length. Costal area at wing base twice as wide as at wing apex, crossed by four crossveins. Subcostal area wide in its middle part, R straight, long, with very slight scooplike bend at apex. RS 1 simple, with straight crossvein r-rs 1+2. RS base at beginning of second quarter of wing length, RS seven-branched. RS 1+2 stem 2.6× as long as RS 3+4 stem. F 1 three-branched, F 2 four-branched. Additional fork on RS 2 of medium size, shorter than that on RS 4 and significantly longer than that on RS 3. F 1 fork 0,6× as long as F 2 fork. Cells DC and MC open. M with five branches, forks slightly distal to RS fork almost at the middle of wing. M 2, M 3 and M 4 simple. M 1 bifurcation short, almost equal in length to its trunk. CuA fork of same size as M 1 fork. Long arcuate cross vein m 3+4 -cua 1+2 present. Y-shaped vein not visible. CuP simple, short, entering wing trailing margin separately from A 1. A 2 long, 0.76× as long as A 1 and 2.6× so as A 3. Anal field narrow. Wing membrane with no coloration. Wing length 8.0 mm, width 3.5 mm.

Remarks. According to the type of branching of RS and M (almost at the same level), the size of the forewing, the absence of a fork on R the described new species is closest to K. grossa Novokshonov, 1993 from the same locality of Kostovaty, differing from it in the much longer stems of R 1+4 and M 1 +3 and an open DC. The new species differs from all other species of the genus Kamopanorpa , including K. grossa , by its seven-branched RS ( Martynov, 1933; Sukatsheva, 1976: Novokshonov, 1992, 1993; Sukatsheva & Aristov, 2017).

Figures

FIGURE 1. Kamopanorpa aristovi sp. nov., holotype PIN, no 3695/141, locality Kostovaty (Middle Ural, Udmurtya, Russia; Middle Permian, Lower Urzhum Formation, Urzhum Horizon). A, Photograph. B, Fore wing. Scale bars = 2.0 mm.