DRYXINI

Krivosheina, M. G. & OZerov, A. L., 2020, A new species of the shore-fly genus Paralimna Loew, 1862 (Diptera: Ephydridae) from Australia, Russian Entomological Journal 29 (2), pp. 222-226 : 223-224

KEY TO GENERA OF DRYXINI

1. Notopleuron bearing a single large seta; presutural supra-alar seta lacking; mid- and hindfemora moderately long to very long, length subequal to that of abdomen ...... 2

— Notopleuron bearing two setae; presutural supra-alar seta usually present; lacking in Papuama Mathis et Zatwarnicki and one species of Oedenops Becker ); mid- and hindfemora normally developed, length much shorter than that of abdomen ................................................... 5

2. Ocellar seta present, although short, inserted slightly in front of anterior ocellus; reclinate fronto-orbital seta present; anepisternum bearing one well-developed seta along posterior margin; vein R 1 bare along dorsum; R stem vein lacking setulae; crossvein dm–cu normally developed, nearly straight, forming acute inner angle with vein M (southern Afrotropical) .............................. ............................................ Corythophora Loew, 1862

— Ocellar seta lacking; reclinate fronto-orbital seta lacking; anepisternum bearing two to three thin, long, hair-like setae along posterior margin; vein R 1 bearing several setulae along dorsum; R stem vein basad of humeral crossvein bearing several pale thin setulae on ventral surface; crossvein dm–cu moderately long to long, sinuous ................................................................................ 3

3. Scutellum with apical tubercles bearing setae and lateral projections lacking setae; wings maculate; both vte and vti setae reduced ................. Dryxella Krivosheina, 2013

— Scutellum without apical tubercles bearing setae and without lateral projections; wings generally hyaline except in a few cases; both vte and vti setae or at least vte seta developed .............................................................. 4

4. Arista bearing seven to nine long, dorsal hairs; katepisternum lacking row of slender setae along dorsal margin and katepisternal seta reduced; crossvein dm–cu shallowly sinuous, generally forming angle with adjacent margin of wing; mid- and hindfemora normally developed, much shorter than length of abdomen ( India, Iran, Oman) .................. Omyxa Mathis et Zatwarnicki, 2002

— Arista bearing 12 or more long, dorsal hairs; katepisternum bearing a row of slender setae near dorsal margin and katepisternal seta usually well developed (secondarily reduced or absent in some species); crossvein dm– cu sinuous, long, generally running parallel with adjacent margin of wing; mid- and hindfemora elongate, subequal to length of abdomen (Afrotropical, Australian, Oriental) ........... Dryxo Robineau-Desvoidy, 1830

5. Katepisternal seta absent or very weakly developed ..... 6

— Katepisternal seta present, usually well developed (sometimes pale) ..................................................................... 7

6. Arista bearing three to five dorsal rays (Afrotropical, Australian [Queensland], Nearctic [southern], Neotropical, Oriental, Palearctic [ Egypt, Israel, Japan]) ............. ................................................. Oedenops Becker, 1903

— Arista bearing eight or more dorsal rays (Australasian, Oriental) .......... Papuama Mathis et Zatwarnicki, 2002

7. R stem vein usually bearing one to three setulae on dorsum (usually two; lacking in Oedenopiforma javana (Wulp)) . Two to three long facial setae, length subequal to combined length of pedicel and basal flagellomere, if two setae, these well separated, dorsal seta at about midheight, ventral seta closer to oral margin than to dorsal seta (Afrotropical, Australian, Oriental) ............. ........................................ Oedenopiforma Cogan, 1968

— R stem vein without setulae. One to four long facial seta (if longer setae present they are not as long or as separat- ed as above, usually arranged in a somewhat vertical series of short setulae) ................................................. 8

8. Forefemur lacking row of closely set, very short, somewhat blunt, toothlike spines along anteroventral surface; anterior proclinate fronto-orbital seta larger than posterior seta; face, gena, anepisternum, anterior surface of tibiae, and basolateral surface of scutellum not silvery microtomentose as in combination below (Pantropical with occasional extensions into temperate) ................... ................................................... Paralimna Loew, 1862

— Forefemur bearing anteroventral row of very short, stout, toothlike setae; proclinate fronto-orbital setae greatly reduced and subequal, setulalike; face, gena, anepisternum, anterior surface of tibiae, and basolateral surface of scutellum densely, silvery microtomentose (Afrotropical) .......................................... Afrolimna Cogan, 1968