Atissini Cresson

Zatwarnicki, Tadeusz & Mathis, Wayne N., 2019, New discoveries in New World Atissini as revealed in revision of Pelignellus Sturtevant & Wheeler (Diptera: Ephydridae), Israel Journal of Entomology (Oxford, England) 49 (2), pp. 11-26 : 15

Key to genera of Atissini Cresson

1 Antenna in moderately to very deep cavities ................................................... 2

– Antenna at most in rather shallow depressions ................................................ 3

2 Foretibia bearing a large, black, blunt, peg-like seta at apex; antennae somewhat approximate, face between antennae a prominent triangle bearing numerous stout, black, setulae; scape greatly enlarged, height twice length; arista reduced to basal, slightly thickened portion ............................. Isgamera Giordani Soika

– Foretibia normal, not bearing a large, blunt, black seta at apex; antennae somewhat separate with face between bases a wide, blunt ridge lacking stout, black setulae; scape about as long as length; arista short but bearing dorsal branches ............. ............................................................................................... Asmeringa Becker

3 Posterior notopleural seta at level distinctly dorsad of anterior seta; face in lateral view concave or protrudent .............................................................................. 4

– Posterior notopleural seta at nearly same level as anterior seta, only slightly dorsad; face in lateral view mostly vertical, straight ........................................ 6

4 Gena moderately high to high, height greater than height of basal flagellomere; 1–2 pairs of interfrontal setae anterior of anterior ocellus ....................... ...................................................................... Pelignellus Sturtevant & Wheeler

– Gena shorter, height always less than height of basal flagellomere; frontal setae, when present, posterior to anterior ocellus....................................................... 5

5 Face in lateral view concave, most prominent at ventral facial margin, lacking dorsally curved setae ................................................................... Atissa Haliday

– Face convex in lateral view, protrudent, prominent just ventrad of antennal bases, bearing large, dorsally curved setae near facial prominence .............................. ............................................................................................ Ptilomyia Coquillett

6 Intrafrontal setae absent; ocellar setae moderately well developed, in ocellar triangle, sometimes just laterad of anterior ocellus; pseudopostocellar setae greatly reduced, hair-like .................................................................... Subpelignus Papp

– Intrafrontal setae well developed, proclinate; ocellar setae reduced, in ocellar triangle; pseudopostocellar setae moderately well developed, usually slightly divergent ........................................................................................................... 7

7 Gena comparatively low, less than ½ eye height. Acrostichal setulae in 2 rows .................................................................................................... Schema Becker

– Gena high, over ½ eye height. Acrostichals in 4 rows ......... Cerobothrium Frey