Pseudocimbex clavatus Rohwer, 1908

Archibald, S. Bruce & Rasnitsyn, Alexandr P., 2023, Cimbicidae (Hymenoptera, ‘ Symphyta’) in the Paleogene: revision, the new subfamily Cenocimbicinae, and new taxa from the Eocene Okanagan Highlands, Zootaxa 5278 (1), pp. 1-38 : 32

Pseudocimbex clavatus Rohwer, 1908

Fig. 28 .

Pseudocimbex clavatus Rohwer, 1908, p. 527 , Fig. 1a, e .

Holotype. UCM 18614 , Rohwer (1908). An almost complete specimen missing most of the legs, one antenna.

Diagnosis. As for genus.

Description. Holotype, female. Body: length 17.6 mm as preserved; head, thorax darker than abdomen. Surface sculpture not discernible. Structure of head, thorax obscure. Antenna very short (flagellum 1.8 mm long, less than half head width), capitate, apparently 11-segmented, scape and pedicel very short, with funicle of four segments gradually shortening distally from twice as long as wide up to strongly transverse and almost round club of possibly five segments, four very short and apical one longer. Hind tibia 4.6 mm long, other leg segments incompletely or not preserved. Forewing length 12.9 mm, maximum width 5.5 mm, length/width 2.4; membrane lightly infuscate, more so toward base; pterostigma dark, narrow, short, wedge-shaped; C, R basal to pterostigma thin, widely separated, slightly more so distally, with crossvein-like Sc between; pterostigma small, wedge-shaped; 1-M at or very close to Rs+M on R; 1r-rs short, 2r-rs lost; Rs+M very short; 2-Rs (separating cells 1r and 2rm) possibly detected (as dotted line in Fig. 28 ); Rs distal of 1r smoothly curved, meeting R 1 at wing margin; 2r-rs absent; 2r-m, 3r-m present, well spaced, straight, near 0.4 and 0.7 length of cell 3r; M notably angled at 1m-cu; 1m-cu short, just more than half length of 1-M, diverging with 1-M toward anterior margin, 1m-cu and 2m-cu join cells 2rm and 3rm, respectively; 1m-cu converging to 1-M forward; 2m-cu slightly curved toward base; cu-a interstitial; anal cells incompletely preserved: cell 1a apparently open posteriorly, distally (2+3A not reaching a1-a2 crossveins), cell 2a closed basally, not preserved distally (distal portion of 2+3A obscured by fore margin of hind wing). Hind wing partially known, with unusual venation; uniformly infuscate as forewing; 1r-m about its length distant from Rs base; with Rs, M+Cu, M, Cu, cu-a and 1A detected, M+Cu forking far basally of RS base, with fork narrow, M and Cu both almost aligned with M+Cu; cu-a slightly reclival, long, placed slightly basal of Rs base; 2r-m, m-cu not evident; 1A evident, with at least short free end preserved. Abdomen moderately narrow, with few details discernible; ovipositor short (length 0.65 mm), barely exceeding abdomen apex.

Material. Holotype.

Locality and age. Florissant Formation, Priabonian.

Figures

FIGURE 1. Forewing and hind wing of Corynis crassicornis (Rossi) (Corynidinae) with veins (roman font) and cells (italic font) labelled. Drawn from Vilhelmsen (2019) figure 15B. Scale = 2 mm.

FIGURE 28. Pseudocimbex clavatus Rohwer holotype, UCM-18614, Tenthredinoidea incertae sedis, from the Florissant Formation:A, photograph; B, drawing; C, drawing of right forewing; D, drawing of left forewing; E, drawing of left hind wing. Scale bars A–B, 5 mm; C–D, 3 mm.