Archibaldia aristovi, Makarkin, 2023

Makarkin, Vladimir N., 2023, Fossil Hemerobiidae (Neuroptera) from the Eocene Tadushi Formation, the Russian Far East, with description of a new genus, Zootaxa 5297 (1), pp. 115-123 : 117-118

Archibaldia aristovi gen. et sp. nov.

Fig. 2

Etymology. From the surname of Daniil S. Aristov (1979–2022), in recognition of his achievements in study of fossil insects.

Holotype. PIN 3364 /3746 (part and counterpart); a rather well preserved basal part of a forewing.

Type locality and horizon. Sadovaya [=Yushangou] River, a right tributary of Zerkal’naya [=Tadushi] River, Sikhote-Alin Mountains, Primorskii Krai, Russian Far East. Tadushi Formation; early/middle Eocene.

Diagnosis. This species may be distinguished from P. wehri by the presence of numerous small transverse brownish spots over radial to cubital spaces [absent in P. wehri ].

Description. Forewing 7.5 mm long as preserved (estimated complete length ca. 14 mm), 5.5 mm wide as preserved (estimated complete width ca. 6.5–7 mm). Costal space very broad basally. Humeral subcostal veinlet well developed, with eight branches (four simple, others forked once to twice). Three proximal-most subcostal veinlets forked three times; others incomplete. Basal subcostal crossvein located at level of origin of RP1. RA space (between RA and ORB3) narrow proximally. RP consists of three branches separately originating on RA. Posterior trace of ORB1 (RP1) sinuous proximally, deeply forked, with three anteriorly directed branches; ORB2 (RP2) sinuous proximally, originating close to origin of RP1, parallel to anterior branch of RP1; ORB3 (RP proper) originating very distant to origin of RP2, with three preserved basal parts of branches. M dichotomously forked opposite sc-ra1, with four long branches; medial space broadens distally. Cu dividing into CuA and CuP very close to wing base. CuA with five incompletely preserved branches; CuA1 originating at second gradate series of crossveins. Posterior trace of CuP nearly straight (slightly curved), with two deeply forked anteriorly directed branches. Two gradate series of crossveins partially preserved. In first (basal) series four crossveins detected: 1sc-r; 1r-m (long, connecting ORB1 at its origin and stem of M); 1cua-cup; 1icup. Second series consists of seven crossveins, from posterior trace of ORB1 (RP1) to posterior trace of CuP. Maculation: Second gradate series of crossveins broadly margined with dark brown; basal subcostal veinlets narrowly margined with brownish; numerous small transverse brownish spots over radial to cubital spaces (similar to that of extant Dilar Rambur, 1838 ).

Figures

FIGURE 2. Archibaldia aristovi gen. et sp. nov., holotype PIN 3364/3746 (dry). A, part; B, counterpart; C, forewing venation. Scale bars = 1 mm.