Oligophlebiopsis, Khramov, Alexander V. & Makarkin, Vladimir N., 2015

Khramov, Alexander V. & Makarkin, Vladimir N., 2015, New fossil Osmylopsychopidae (Neuroptera) from the Early / Middle Jurassic of Kyrgyzstan, Central Asia, Zootaxa 4059 (1), pp. 115-132 : 117

Genus Oligophlebiopsis gen. nov.

Type and only species. Oligophlebiopsis biramosa sp. nov.

Diagnosis. Hind wing small, broad (ca. 8 mm long); MA, Rs1 both twice deeply forked; Sc, R1 distally fused; probably few radial crossveins; CuA pectinate.

Etymology. From the Greek oligos, few, scanty, little, phlebion, veinlet, and opsis, appearance, in reference to little number of veins and crossveins. Gender feminine.

Remarks. Although the genus Oligophlebiopsis gen. nov is only represented by an incomplete and poorlypreserved hind wing, we assign it to Osmylopsychopidae based on the forked MA and the distal fusion of Sc and R1.

The new genus somewhat resembles the late Early Jurassic genus Parhemerobius which was assigned to Osmylopsychopidae by Ponomarenko (1996) by its small size and wing shape. Oligophlebiopsis gen. nov. easily differs from Parhemerobius by the twice deeply forked MA and Rs1. However, the osmylopsychopid affinity of Parhemerobius seems quite doubtful (or at least questioned), because all species of Parhemerobius lack the deeply forked MA and possess the pectinate CuP in the forewing, both are not characteristic of typical Osmylopsychopidae .

Oligophlebiopsis biramosa sp. nov. Figs 1 , 2

Description. Hind wing broad, ca. 6.5 mm long as preserved (measured along R1; estimated complete length ca. 8 mm); ca. 5 mm wide (perpendicular to R1). Costal space fragmentarily preserved; approximately three times as wide as subcostal space in distal part. Subcostal veinlets almost not preserved. Sc, R1 fused distally. Sc+R1 veinlets poorly preserved, at least one forked. Subcostal space relatively narrow, poorly preserved. Space between R1, Rs relatively narrow, broadened distally. Rs with eight branches proximad fusion Sc, R1. Rs1 twice deeply forked; Rs2 once deeply forked; other branches of Rs shallowly forked. MA originated from Rs, twice deeply forked. Fork of MP not preserved. MP1, MP2 parallel before branching; MP1 shallowly dichotomous; MP2 few pectinate, with two branches. CuA concave, pectinate; with six rather long branches, mostly rather shallowly forked. CuP incomplete, possibly dichotomous. Anal veins not preserved. Crossveins poorly preserved; only four crossveins between R1 and Rs detected but others possible. Color pattern not preserved.

Material. Holotype PIN 2903 / 295 (part, counterpart), an incomplete, poorly-preserved hind wing, housed in PIN.

Type locality and horizon. Kyrgyzstan: Sogyuty; Early Jurassic (Sinemurian/Hettangian).

Etymology. From the Latin bis, double, and ramosus [- a, - um], branched, in references to the two-branched MA and Rs1.

Figures

FIGURE 1. Oligophlebiopsis biramosa gen. et sp. nov. Holotype PIN 2903 / 295. A, part. B, counterpart. Scale bars = 2 mm.

FIGURE 2. Oligophlebiopsis biramosa gen. et sp. nov. Hind wing venation of the holotype PIN 2903 / 295. Scale bar = 2 mm.