Sciomyzidae, Fallen, 1820

Murphy, William L., González, Christian R. & Elgueta, Mario, 2022, A catalog of the Sciomyzidae of Chile, with a key to genera (Diptera: Sciomyzoidea), Zootaxa 5099 (2), pp. 261-278 : 274-275

Key to Chilean genera of the Sciomyzidae

1 Proepisternal seta present, strong (Tribe Sciomyzini , plus Eutrichomelina , Perilimnia , and Shannonia of Tribe Tetanocerini ; proepisternal seta short and fine in Shannonia meridionalis ) [ Calliscia , Ditaeniella , Eutrichomelina , Parectinocera , Perilimnia , Pherbellia , Shannonia ]............................................................................. 2

- Proepisternal seta absent, only setulae present (Tribe Tetanocerini , plus Pseudomelina of Tribe Sciomyzini ) [ Euthycerina , Protodictya , Pseudomelina , Tetanoceroides ]................................................................... 8

2 Vein CuA+CuP not reaching margin of wing. Vein R 1 not exceeding level of crossvein r-m. Two dorsocentral setae (anterior dorsocentral seta at suture, very strong). Arista short, pubescent. Palpus with one strong apical seta. Gena very narrow. Tiny, shiny black, brown, or yellowish species.................................................. Parectinocera Becker

- Vein CuA+CuP reaching margin of wing, although weakly in some species. Without above combination of characters [ Calliscia , Ditaeniella , Eutrichomelina , Perilimnia , Pherbellia , Shannonia ].......................................... 3

3 Four dorsocentral setae (one presutural, three postsutural). Frontal vitta very short, tomentose. Vein R 1 exceeding level of crossvein r-m.......................................................................... Eutrichomelina Steyskal

- Two or three dorsocentral setae (all postsutural). Frontal vitta short and tomentose or elongate and subshiny. Vein R 1 exceeding level of crossvein r-m or not [ Calliscia , Ditaeniella , Perilimnia , Pherbellia , Shannonia ]............................. 4

4 Three dorsocentral setae. Anepisternal seta present, katepisternal setae absent. Frontal vitta extending scarcely beyond ocellar triangle. One fronto-orbital seta. Wing without pattern, hyaline.................................... Calliscia Steyskal

- Two or three dorsocentral setae. Both anepisternal and katepisternal setae present or both absent or only katepisternal setae present. Frontal vitta short or elongate. One or two fronto-orbital setae. Wing with or without pattern [ Ditaeniella , Perilimnia , Pherbellia , Shannonia ]................................................................................. 5

5 Frontal vitta usually reaching anterior margin of frons, subshiny. One fronto-orbital seta. Prosternum with a few setulae. Katepisternum without setae. Hind coxa with setulae on inner posterodorsal margin. Wing without pattern. Anterior surstylus vestigial................................................................................. Ditaeniella Sack

- Without above combination of characters [ Perilimnia , Pherbellia , Shannonia ]..................................... 6

6 Frontal vitta short, triangular, pollinose. Postpedicel almost as long as wide or slightly longer than wide. Anepisternum without setae, with or without setulae. Anterior surstylus well developed. Wing patterned or not..... Pherbellia Robineau-Desvoidy

- Frontal vitta elongated, parallel sided, subshiny. Postpedicel 1–5 times longer than wide. Anepisternal setae present or absent, anepisternum setulose. Anterior surstylus vestigial. Wing not patterned [ Perilimnia , Shannonia ]....................... 7

7 Anterior fronto-orbital seta much shorter than posterior fronto-orbital seta, occasionally absent. Postpedicel elongate, tapering toward blunt apex. Anepisternum with one seta and several setulae. Male fourth abdominal sternite with short, dense, black spinules on posterior margin............................................................... Perilimnia Becker

- Anterior fronto-orbital seta almost as long as posterior fronto-orbital seta. Postpedicel rather short, more or less rounded apically. Anepisternum without setae, with setulae on posterior portion only. Male fourth abdominal sternite without short, dense, black spinules on posterior margin......................................................... Shannonia Malloch

8 Postpedicel broadly rounded apically. Anepimeron with one or two setae. Hind coxa without hairlike setulae on inner posterodorsal margin. Two postsutural dorsocentral setae....................................... Pseudomelina Malloch

- Without above combination of characters [ Euthycerina , Protodictya , Tetanoceroides ]............................... 9

9 Face with black central spot.Arista white, densely pubescent. Lunule broadly exposed. Hind coxa with hairlike setulae on inner posterodorsal margin................................................................... Protodictya Malloch

- Face without black central spot and without above combination of other characters [ Euthycerina , Tetanoceroides ]....... 10

10 Arista with black pubescence or hairs. Katepisternum with two strong setae..................... Tetanoceroides Malloch

- Arista with white pubescence or hairs. Katepisternum without setae, with setulae only............... Euthycerina Malloch