Eoeustochus borchersi Huber

Huber, John T. & Greenwalt, Dale, 2011, Compression fossil Mymaridae (Hymenoptera) from Kishenehn oil shales, with description of two new genera and review of Tertiary amber genera, ZooKeys 130, pp. 473-494: 475-476

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Eoeustochus borchersi Huber

sp. n.

Eoeustochus borchersi Huber   ZBK   sp. n. Figs 58

Type material.

Holotype female (NMNH ) labelled " Eoeustochus borchersi   Huber Holotype female #543759"

Paratype female (NMNH), labelled as for holotype but "paratype #543760".


Female. Colour dark brown, fore wing thinly margined with brown. Holotype (Fig. 5) measurements as follows. Body length 1094. Antenna (Fig. 6) with total funicle length 432; scape -, pedicel 58, fl1 69, fl2 78, fl3 71, fl4 64, fl5 56, fl6 54; clava 186, 0.47 × funicle length. Fl2 distinctly the longest segment and fl6 the shortest. Fore wing (Fig. 7) length 948, width 312, length/width 2.72, longest marginal setae 188, venation (Fig. 8) length 395. Hind wing length 781, width 32. Ovipositor length 292, not exserted beyond apex of gaster.


This species differs from Eoeustochus kishenehn   by the longer funicle segments (funicle 2.31 × clava length cf. 1.83 × in Eoeustochus kishenehn   ) and slightly wider fore wing (length/width at most 3.49 instead of at least 3.64 in Eoeustochus kishenehn   ).

Derivation of species name.

Named after Harold Borchers, professor of entomology and early mentor to the junior author at Bemidji State University, Bemidji, Minnesota.