Bentrovata Richards, 1973

Papp, László, 2021, New Species Of Apterobiroina L. Papp And Bentrovata Richards (Diptera, Sphaeroceridae) From Australia, Acta Zoologica Academiae Scientiarum Hungaricae 67 (2), pp. 101-117 : 109-110

Bentrovata Richards, 1973

Bentrovata Richards, 1973: 301 , 394.

Type species: Bentrovata regalis Richards, 1973: 395 .

The description of the genus was given by RICHARDS (1973). Some additional characters as well as a description of male and female genitalia are given below.

Head. Frons usually with 5 whitish or silvery stripes. Only 1 pair of ors. Head setae occe and occi though small, well-discernible. Arista about 3–4 times as long as antenna with short cilia only.

Thorax. Pleura anteriorly without any emargination; a large emargination present on distal 1/3 of thorax, which receives mid and hind femur when at rest. Prosternum linear, with a small triangular dilatation posteriorly (see RICHARDS 1973). Scutellum with distinctly curved posterior margin (in contrast to the straight margin in Monteithiana Richards, 1973 ). No wings or halteres, i.e. totally reduced (absent).

Legs. Similar to those of Apterobiroina , i.e. short and more or less thickened. Mid tibia with a strong va, no mid ventral seta. Antero-dorsal and postero-dorsal setae are paired at basal 1/3 and about apical 4/5. Hind tibia without dorsal preapical seta.

Abdomen. Strongly sclerotised, lateral margins of preabdominal tergites and sternites nearly meet laterally. Female postabdomen small, telescopized ( Fig. 38 ).

Male genitalia. Dorsal part of synsternite short ( Figs 24 , 30 , 46 ). Ventro-medial process of synsternite with unarranged ( Figs 21–22 ) thick setae or those are in 1 row ( Figs 31–32 , 44–45 ). Surstylus smaller, rounded (not divided), with 1 large thorn ( Figs 26 , 34–35 , 49–50 ). Postgonite slender, its apex narrow and proclinate ( Figs 27 , 37 , 48 ).

Female genitalia. Spermathecae less sclerotised, with a small bulb on initial section of duct ( Figs 28 , 39–40 , 53 ). Cercus shorter, with short setae ( Figs 29 , 41–42 , 51–52 ). Epiproct membranous, without a pair of dorsal setulae ( Figs 29 , 41–42 , 51–52 ).

Figures

Figs 38–42. Bentrovata nigrithorax L. Papp et Szappanos, sp. n., paratype female. 38 = habi- tus, lateral view (del. A. Szappanos); 39 = paired spermathecae; 40 = single spermatheca; 41 = cerci and hypoproct, dorsal view; 42 = same, ventral view. Scale: 0.1 mm for Figs 39–42

Figs 21–29. Bentrovata flavithorax sp. n., male and female paratypes, postabdomen and genitalia. 21–27: male: 21 = sternite 5 and ventral part of synsternite, ventral view; 22 = ventromedial part of synsternite, ventral view; 23 = pseudocerci and subepandrial sclerite, caudal view; 24 = synsternite, anterior view; 25 = hypandrium, ventral view; 26 = surstylus, broadest (sublateral-subventral) view; 27 = postgonite, phallus and phallapodeme, lateral view. 28–29: female: 28 = spermathecae; 29 = cerci, dorsal view. Scale: 0.4 mm for Fig. 24; 0.2 mm for Fig. 21; 0.1 mm for Figs 22–23, 25–29

Figs 30–37. Bentrovata minor sp. n., holotype male, terminalia and genitalia. 30 = dorsal part of synsternite, anterior view; 31 = sternite 5 and ventral part of synsternite, ventral view; 32 = ventro-medial part of synsternite, ventral view; 33 = ventral part of epandrium and subepandrial sclerite, caudal view; 34 = surstylus, lateral view; 35 = same, ventral view; 36= hypandrium, ventral view; 37 = left postgonite, phallus and phallapodeme, lateral view. Scale: 0.4 mm for Fig. 30; 0.2 mm for Figs 31, 33, 36; 0.1 mm for Figs 32, 34–35, 37

Figs 43–53. Bentrovata regalis Richards, 1973, male and female postabdomen and genitalia. 43–49: male: 43 = basal sternites, ventral view; 44 = sternite 5 and ventro-medial part of synsternite, ventral view; 45 = ventro-medial part of synsternite, ventral view, higher magnification; 46 = synsternite, anterior view; 47 = pseudocerci, caudal view; 48 = genital complex, lateral view; 49–50 = surstylus, in two, slightly different broadest views. 51–53: female: 51 = postabdomen, lateral view; 52 = same, ventral view; 53 = spermathecae. Scale: 0.4 mm for Fig. 43; 0.2 mm for Figs 44, 46; 0.1 mm for Figs 45, 47–53