Osmylidia sp.

Makarkin, Vladimir N., Archibald, S. Bruce & Mathewes, Rolf W., 2021, New Protosmylinae (Neuroptera: Osmylidae) from the early Eocene of western North America, with taxonomic remarks, Zootaxa 4980 (1), pp. 142-156 : 149

Osmylidia sp.

Fig. 4

Material. Specimen RBCM P1567, collected by SBA July 23, 2001; deposited in RBCM. A poorly preserved incomplete hind wing on a piece of shale with a heteropteran (Hemiptera), a syrphid (Diptera), and two nematoceran pupae (Diptera).

Locality and horizon. Ootsa Group shale exposed at Driftwood Canyon Provincial Park, British Columbia, Canada; Eocene (mid-Ypresian).

Description. Hind wing 10.9 mm long as preserved (estimated complete length about 11.5 mm), ca. 5 mm wide (actual width probably less, wing deformed). Costal space relatively broad, with simple, relatively closely spaced subcostal veinlets. Sc fused with RA far from wing apex. Subcostal space incompletely preserved, narrow distally; crossveins not detected. RA space relatively narrow for most length, basally broadened, with three detected crossveins in proximal half. RP with 11 branches, all probably shallowly forked (their deep forks absent, distal portions not preserved). Fork of M not detected. MA probably deeply forked, MP probably pectinate (both fragmentarily preserved). Nearly all preserved crossveins in radial, radio-medial spaces arranged in intermediate, outer gradate series (both series incomplete) or single crossvein in position of proximal gradate series in other Protosmylinae ; one crossvein in intermediate series adventitiously forked. Two preserved crossveins between posterior branch of MA, MP. CuA strongly pectinately branched, with eight branches. CuP relatively short, forked twice distally.

Remarks. Although it differs from other species by its arrangement of crossveins between RA and RA, this incomplete specimen lacks many potentially diagnostic characters (e.g., the configuration of M), and we, therefore, do not name a species based on it.

Figures

FIGURE 4. Osmylidia sp., hind wing specimen RBCM P1567. A, photograph; B, drawing. Posterior branch of MA in red. Scale bar = 5 mm.