Sarginae, Walker, 1834

Lessard, Bryan D., Yeates, David K. & Woodley, Norman E., 2020, Review of Australian Sarginae Soldier Fly Genera (Diptera: Stratiomyidae), with First Records of Cephalochrysa, Formosargus and Microchrysa, Records of the Australian Museum 72 (2), pp. 23-43: 26-27

publication ID

http://doi.org/ 10.3853/j.2201-4349.72.2020.1683

publication LSID

lsid:zoobank.org:pub:184539DF-E8DD-4A48-8E38-70B7860D6134

DOI

http://doi.org/10.5281/zenodo.4654258

persistent identifier

http://treatment.plazi.org/id/0386879A-FFC6-EE5F-FB81-FC14FAA3FD57

treatment provided by

Felipe

scientific name

Sarginae
status

 

Key to Australian Sarginae  genera

1 Wings with R 2+3 arising proximal to or above r-m; membranous strap-like lobe absent at base of wings; yellowish brown flies, usually not metallic ................................................................................................................... 2

—— Wings with R 2+3 arising distal to r-m, usually beyond discal cell; membranous strap-like lobe present at base of wings; metallic flies .............................................................................................................................. 3

2 Frons wide and almost parallel in females; face slightly anteroventrally produced to form a small beak-like protuberance visible in profile view; scutum with a distinct black medial vitta; wings with vein M weak and nearly unpigmented between cells br and bm, M 1 and M 3 very weakly developed, M 4 connected to discal cell (i.e. dM 3+4 absent); alula reduced, almost linear ( Fig. 4View Figure 4) ..................................................................................... Formosargus James, 1939 

—— Upper frons converging ventrally in females; face evenly rounded in profile view; scutum concolorous yellowish brown ( Figs 9View Figure 9, 10View Figure 10) or dully metallic ( P. longipes  ; Figs 7View Figure 7, 8View Figure 8), without any distinct markings; wings with vein M noticeably pigmented between cells br and bm, M 1 and M 3 well developed, M 4 separated from discal cell at least slightly by dM 3+4; alula large and apically expanded ............................................................................... Ptecticus Loew, 1855 

3 Head anteriorly produced in dorsal view, more circular and less than 1.5 times as wide as high in frontal view; occiput narrowly visible in dorsal view, with a prominent, posteriorly projecting fringe of hair-like setae; frons extremely narrow in females (index> 4), narrowly dichoptic in males by width of anterior ocellus; frontal ocellus distant from posterior ocelli, forming an elongated triangle; wings with all medial veins strong; CuA strongly curved, petiole vein CuA+CuP relatively long; apical half of alula set with microtrichia; abdomen slender elongate, about twice as long as wide ( Figs 11–15View Figure 11View Figure 12View Figure 13View Figure 14View Figure 15) .............................................. Sargus Fabricius, 1798  —— Head anteroventrally compressed in dorsal view, more than twice as wide as high in frontal view; occiput well developed and visible in dorsal view in females, both sexes without an obvious posteriorly projecting fringe of hair-like setae; frons wide in females (index <2), holoptic in males; ocelli forming an equilateral triangle; wings with at least some faint medial veins; CuA relatively straight, petiole vein CuA+CuP short; surface of alula bare of microtrichia; abdomen short, broad and ovoid, about 1.2–1.4 times as long as wide .......................................................................................... 4

4 Small species (length <6 mm); head more rounded in anterior view, about 0.75 times as high as wide; lower frons without distinct triangular callus; wing cell r 1 stained yellow; all medial veins faint ( Figs 5View Figure 5, 6View Figure 6) ........................................................................... Microchrysa Loew, 1855 

—— Medium sized species (length ≥ 6 mm); head dorsoventrally compressed in anterior view, about 0.6 times as high as wide; lower frons with a distinct triangular callus diverging ventrally towards base of antennae; wing cell r 1 stained brown; veins M 2 and M 4 strong ( Fig. 3View Figure 3) ................................................................... Cephalochrysa Kertész, 1912