Taxonomic notes on the genera Scatella and Scatophila (Diptera: Ephydridae) with a remark on Trixoscelis chilensis (Trixoscelididae) Author Zatwarnicki, Tadeusz Author Irwin, Anthony G. text Zootaxa 2018 2018-01-31 4377 1 91 109 journal article 30877 10.11646/zootaxa.4377.1.6 bf31986f-33c6-4a7b-8b58-736c352e54e4 1175-5326 1163298 CD3ED409-1877-4141-9AE3-ADAC1BE329BE Scatella ( Scatella ) lacustris ( Meigen, 1830 ) , revised status ( Fig. 8 ) Ephydra lacustris Meigen, 1830 : 118 . Scatella lacustris : Becker, 1902 : 310 (combination), synonymy with S. stagnalis ( Fallén, 1813 ) . Scatella tenuicosta Collin, 1930 : 136 , new synonym . Scatella thermarum Collin, 1930 : 138 , synonymized with S. tenuicosta Collin, 1930 by Olafsson, 1991 : 31 . Type material examined: one female lectotype of the senior synonym, herein designated, double mounted on a thin pin in a paper square, in good condition, but covered with some dust, right wing folded, labelled: “26.98 40" (rounded label), on the reverse “Meigen” (handwritten), “ lacustris ” (handwritten) preserved in MNHM; the male lectotype of the junior synonym, herein designated, in good condition labelled: "Pitsea 7/6/94 ", " Scatella tenuicosta Collin " - 1 ♂; paralectotypes: two females with the same labels (one with posterior margin of the right wing slightly torn); a male in good condition labelled: "Pitsea 7/6/94 ", " Scatella tenuicosta Collin Det. I. Lansbury 197"; a male with removed abdomen, labelled: "Walton-on-Naze 9. 6. 0 8 Col. Y.", its terminalia in Canada balsam on a celluloid square bearing a label: "Walton-on-NAZE 9. VI. 1908 Col. Yerbury", " Scatella tenuicosta Collin ", all preserved in OUMNH. According to Mathis and Zatwarnicki (1995) some type material is also present in NHMUK and MZLU. Other material examined: Numerous specimens from Austria , Belgium , Bulgaria , Czechia , Denmark , Finland , France , Germany , Great Britain , Greenland , Hungary , Iceland , Ireland , Italy , Netherlands , Norway , Poland , Portugal , Romania , Russia , Spain , Sweden , Switzerland , United Kingdom , United States ( Arizona , Illinois ). The type locality of senior synonym was not given, and the specimen was possibly collected in Central Europe ( France or Germany ) . Type locality of the junior synonym: Essex : Pitsea and Walton-on-Naze ; Dorset : Arne ; Glamorgan : Porthcawl ; Norfolk : Palling-on-sea; Suffolk : Aldeburgh , Felixstowe , Butley , Newmarket ( Great Britain ) . Diagnosis. The species is closely related to S. stagnalis (Fallén) , but is distinguished from other species by the wing with spot 3 (distal spot in R5) narrowest in middle; costal section II longer than III ( Fig. 8 ); female sternite 7 a single sclerite. Male terminalia illustrated by Olafsson (1991 ; figs 15d–h, page 30) and Beshovski (2009, fig. 147, pages 370–371) . Distribution. Afrotropical: Cape Verde Islands. Nearctic: Greenland , United States ( Arizona , Illinois , Oregon ). Palaearctic: Austria , Azores , Belgium , Bulgaria , Canary Islands , China , Cyprus , Czechia , Denmark , Egypt , Finland , France , Germany , Great Britain , Greece , Hungary , Iceland , Ireland , Italy , Jordan , Madeira Islands , Norway , Poland , Russia (European Territory), Serbia , Slovakia , Spain , Sweden , Switzerland , Tunisia , Turkey . Remarks. Characters of the lectotype : wing spot 3 narrowest in middle; costal section II longer than III; female sternite 7 a single sclerite, characterize S. tenuicosta and distinguish it from S. stagnalis (Fallén) . Becker (1902) had not realised there was a second species and incorrectly placed lacustris in synonymy with stagnalis .