Psilopini

Savaris, Marcoandre, Marinoni, Luciane & Mathis, Wayne N., 2016, Revision of the shore-fly genus Peltopsilopa Hendel (Diptera: Ephydridae), Zootaxa 4083 (1), pp. 83-98 : 85

Tribe Psilopini Cresson

Psilopini Cresson 1925: 241 (as Psilopinae ). Type genus: Psilopa Fallén 1823 .─ Mathis & Zatwarnicki 1995: 30 ‒50 [world catalog].

Heringinae Enderlein 1934: 191. Type genus: Heringium Enderlein 1934 (= Clanoneurum Becker 1903 ). Clanoneurinae Enderlein 1936: 168. Type genus: Clanoneurum Becker 1903 .

Diagnosis. The tribe Psilopini is distinguished from Discomyzini and other tribes of Ephydridae by the following combination of characters: Small to moderately small shore flies, body length 1.50‒2.50 mm; usually mostly black, shiny, investiture of microtomentum usually sparse, especially on frons and mesonotum. Head: Ocellar seta aligned behind anterior ocellus, sometimes only slightly so; reclinate fronto-orbital seta inserted behind or weakly developed, lateroclinate (sometimes well developed, divergent, and slightly proclinate), usually much less than 1/2 length of ocellar seta; arista with 7‒14 dorsal rays; conformation of face variable, usually mostly smooth, sometimes shallowly pitted or rugose; gena, including midportion, setulose, its posterior margin rounded. Thorax: Mesonotum generally sparsely microtomentose to bare, subshiny or shiny, although variable; supra-alar seta usually lacking, if present, well developed, subequal to postalar seta; arrangement of acrostichal setulae variable; prescutellar acrostichal setae usually present, widely set apart and aligned anterior of posteriormost dorsocentral setae; scutellum usually sparsely setulose; anterior and posterior notopleural setae inserted at about the same level.

Discussion. The tribe Psilopini is closely related to Discomyzini Acloque and these two tribes constitute the subfamily Discomyzinae Acloque ( Mathis & Zatwarnicki 1995). There are now six South American genera in Psilopini that can be distinguished by the following key.