Compression fossil Mymaridae (Hymenoptera) from Kishenehn oil shales, with description of two new genera and review of Tertiary amber genera Huber, John T. Greenwalt, Dale ZooKeys 2011 130 473 494 urn:lsid:zoobank.org:act:B96FABBE-964F-4D92-AF7A-D3DE8EBB780B Huber Insecta Mymaridae Eoeustochus GBIF Animalia Eoeustochus borchersi Hymenoptera 2 475 Arthropoda species borchersi   Typematerial. Holotype female (NMNH) labelled " Eoeustochus borchersiHuber Holotype female #543759" Paratype female (NMNH), labelled as for holotype but "paratype #543760".  Description. 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 xfunicle 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.  Figures 5-6. Eoeustochus borchersi, holotype 5 habitus lateral 6 head and antennae.  Figures 7-8. Eoeustochus borchersi, holotype 7 wings 8 mesosoma and base of wings.  Comments. This species differs from Eoeustochus kishenehnby the longer funicle segments (funicle 2.31 xclava length cf. 1.83 xin 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.