Cytocupes magnus Yan & Strelnikova, 2025

Yan, Evgeny V., Felker, Anastasia S. & Strelnikova, Olesya D., 2025, Early Triassic beetle fauna (Insecta: Coleoptera) from the Eastern Siberian locality Alisa quarry showing late Permian taxa composition, Zootaxa 5715 (1), pp. 494-518 : 504-505

Cytocupes magnus Yan & Strelnikova , sp. nov.

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( Fig. 3 )

Material. Holotype — PIN, No. 5890/10. Isolated elytron, left.

Locality and horizon. Alisa locality, Nidym Formation, Lower Triassic.

Diagnosis. Veins 4 and 5 are very closely spaced. Veins 2 and 3 are merging at the level of elytral distal 1/5. Veins 4 and 5 half as long as the elytron. Double rows of cells nearly touching each other’s borders, in the field III, IV and VI.

Description. Elongated elytron, 4 times as long as wide, carinated, apex symmetrical, rounded. Epipleural and sutural margins lacks cells or punctures. Humeral bulge weakly defined. Veins 2 and 3 are merging at the level of elytral distal 1/5. Veins 4 and 5 are close to each other, half as long as the elytron. Fields III, V and VI has straight double row of cells, field IV have 1–2 rows of cells. Field IV are expanded at the base and has up to 3 cells. Cells roundish, rarely oval-shaped, without encrusted maculae. Cells larger near humeral area, size decrease very slightly towards the apex.

Measurements (in mm). Elytron length 11.6, width 2.9.

Etymology. After Latin “ large ”, due to considerable elytron size.

Remarks. The specimen was attributed to the genus Cytocupes due to having veins 2 and 3 merging near elytral apex; having short vein 4 ( CuA sensu Ponomarenko 1969 ) near elytral base; lack of cells on epipleural margin.

Comparison. Differs from other congener species in large size; having elytral apex not elongated into tail-like extension; field IV being wider than V, having 3 cells in it instead of 6.

Figures

FIGURE 3. Cytocupes magnus Yan & Strelnikova, sp. nov., the holotype PIN, No. 5890/10 electron micrograph (A) and interpretative line drawing (B). Scale bars = 1 mm.