Trigonomiminae sensu Dikow 2009a
Holcocephala abdominalis , image © Michael Thomas.
Trigonomiminae
– anterior tentorial pits well developed and conspicuous anteroventrally located (44)
– apex of labella pointed (24)
– postocular setae formed by regular setae (no macrosetae) (66)
– prosternum and proepisternum fused, prosternum narrow above prothoracic coxae (74)
– supra-alar setae absent (90)
– female spermathecae occupying more than posterior three abdominal segments (182)
The monophyly of Trigonomiminae has not been questioned previously due to the distinct appearance of these flies that are often referred to as “goggle-eyed” robber flies.
Trigonomimini: Holcocephala, Rhipidocephala, Trigonomima
– setae on dorsal postpedicel present (55)
– apical scutellar setae absent (98)
– T1 divided medially by membraneous area (152)
Xenomyzini: Damalis
– postpedicel with proximal bulb and distal elongated part (54)
– antennal stylus reduced to apical “seta-like” sensory element, which is situated subapically in cavity on postpedicel (57, 58)
– postpronotal setae absent (73)
– metathoracic trochanter medially with posteriorly directed protuberance (115)
– short, stout, cone-shaped macrosetae ventrally on metathoracic femora (116)
– costa terminates at CuA2 and A1 (140)
– female with abdominal T10 lost or fused to cerci (172)
– male hypopygium rotated (195)
– male epandrium formed by a single sclerite (197)
– male lacking gonocoxal apodeme (204)