Schistostoma Becker, 1902

Brooks, Scott E., Cumming, Jeffrey M. & Grimaldi, David A., 2019, Remarkable new fossil species of Schistostoma Becker (Diptera: Dolichopodidae Microphorinae) from mid-Cretaceous Burmese amber, Zootaxa 4624 (1), pp. 121-131 : 122

Genus Schistostoma Becker

Schistostoma Becker, 1902: 46 . Type species: Schistostoma eremita Becker , by monotypy.

Diagnosis. Schistostoma is distinguished from other known microphorine genera by the following combination of features: cell dm of wing present and emitting three branches, anal lobe of wing well-developed and right-angled, scutellum usually with 1–2 pairs of setae, male genitalia with medial hypandrial prolongation, female terminalia with tergite 10 divided and bearing acanthophorous spines or setae.

Remarks. Shamshev & Sinclair (2006) provided key characters to distinguish Schistostoma from Microphor , the other extant genus of Microphorinae . Two of the features they listed for Schistostoma , 1–2 pairs of scutellar setae and female terminalia with acanthophorous spines, are now known to exhibit more variation than they indicated, and this is reflected in the diagnosis of the genus above.