Phenacoperga coloradensis ( Cockerell, 1907 )

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 : 29

Phenacoperga coloradensis ( Cockerell, 1907)

Fig. 26 .

Perga coloradensis Cockerell, 1907, p. 446 .

Phenacoperga coloradensis Cockerell, 1908, p. 113 –114, new combination.

Holotype. UCM 4537 A rather complete female specimen missing most of the legs and the right wings. “ Perga ” coloradensis of Cockerell (1907) and see Phenacoperga of Cockerell (1908) and Rohwer (1908).

Diagnosis. As for genus.

Description. Holotype, female. Body: length ca. 27.7 mm; head, thorax, abdomen dark; antennae short, ca. 6.7 mm, 1.2 × head width (5.7 mm), dark, subclavate (very gradually widening apicad), with basal fragellomeres short (ratios of five apical segment lengths from base to apex, 1: 1.1: 0.8: 0.7: 1.7), apical one longer than two preapical combined; labrum large (ca. half as wide as separation of compound eyes); median longitudinal mesonotal sulcus, notauli present, well-developed. Forewing: membrane hyaline, length ca. 20.7 mm, maximum width estimated ca. 6.5 mm, length/width: ca. 3.3; pterostigma narrow, tapering, similar to width of C-R before pterostigma; R+M about same length as 1-M; maximum length of cell 2r shorter than 3r; 2r-rs longer than Rs between 2r-m, 2r-rs, joining Rs just basal to middle of cell 3rm; 2r-m nearly straight, short, joins M at 2m-cu; 1-M straight; cell 1mcu with M, 1m-cu divergent toward anterior margin; 3r-m straight; cell 2mcu with M longer than 1m-cu; 2m-cu apparently straight (faint); cu-a at branching of M, Cu; 2A complete, anal cells separated by crossvein 1a. Hind wing with m-cu much closer to 3r-m than to cu-a. Hind coxae small, apparently contiguous, hind femur and tibia thin. First abdominal tergum apparently not split medially, with hind margin rounded. Abdomen much wider than thorax, almost as long as forewing, ovipositor comparatively long (about one third as long as abdomen).

Locality and age. Florissant Formation, Priabonian.

Figures

FIGURE 26. Phenacoperga coloradensis Cockerell holotype, UCM-4537, Cimbicinae, from the Florissant Formation: A, photograph; B, drawing; C, drawing of right forewing; D, drawing of left forewing. Scale bars A–B, 5 mm; C–D, 5 mm.