Eustrophinae Gistel 1856
Creators: name: Pollock, Darren
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Tetratomidae

description: Identification key to Nearctic genera and Canadian species of Eustrophinae 1 Outer faces of meso- and metathoracic tibiae with numerous oblique, comblike ridges (as in Fig. 16)............................................................................. 2 – Outer faces of meso- and metathoracic tibiae with scattered spines but without oblique ridges (Fig. 15)......................................................................... 4 2(1) Prothoracic episterna with distinct, transverse suture; dorsal surface dark piceous to black, without brownish iridescence (<i>Eustrophopsis</i> Champion).....3 – Prothoracic episterna without transverse suture; dorsal surface distinctly brown, slightly iridescent....................................... <i>Eustrophus tomentosus</i> Say 3(2) Innermost margins of eyes widely separated by distance greater than length of first antennomere (Fig. 13); entire body dark brown to black, without distinctly contrasting lighter color ventrally or on antennae.................................................................................................. <i>Eustrophopsis confinis</i> (LeConte) – Innermost margins of eyes more narrowly separated (Fig. 12), in some specimens virtually contiguous; if slightly separated, then gap less than length of first antennomere; body dark dorsally, with legs, much of venter and antennomere 11 distinctly contrasting................... <i>Eustrophopsis bicolor</i> (Fabricius) 4(1) Prosternal process narrowed distally, not extending posteriad of prothoracic coxae; elytral punctation coarse, forming distinct striae (Fig. 7).............................................................................................. <i>Synstrophus repandus</i> (Horn) – Prosternal process widened distally, separating prothoracic coxae; elytral punctation fine to coarse, not forming distinct striae (Holostrophini).........5 5(4) Eyes distinctly emarginate (Fig. 10); prosternal process longer, protruding behind posterior edge of prothoracic coxae; elytra dark in color, with 4 subquadrate, lighter colored maculae (Fig. 3)......... <i>Holostrophus bifasciatus</i> (Say) – Eyes only indistinctly emarginate (Figs 8-9); prosternal process at most slightly projecting behind posterior edge of prothoracic coxae; elytra uniformly rufous to piceous, without distinctly delimited lighter areas (<i>Pseudoholostrophus</i> Nikitsky)..................................................................................................... 6 6(5) Dorsal surface finely punctate (Fig. 1), setae short and adpressed against surface; impressions along posterior pronotal margin linear, parallel, distinctly impressed; anterior margin of pronotum not elevated shelf-like above level of head; known only from western North America (in Canada, only British Columbia)................................... <i>Pseudoholostrophus impressicollis</i> (LeConte) – Dorsal surface more coarsely punctate (Fig. 2), setae more distinct and at least partly erect; impressions along posterior pronotal margin indistinct; anterior margin of pronotum distinctly elevated above level of head; known only from eastern North America (in Canada, only southern Quebec)........................................................................................... <i>Pseudoholostrophus discolor</i> (Horn)
description: Published as part of <i>Pollock, Darren, 2008, Review of the Canadian Eustrophinae (Coleoptera, Tetratomidae), pp. 261-290 in ZooKeys 2 (2)</i> on pages 264-267, DOI: 10.3897/zookeys.2.30, http://zenodo.org/record/576400