Stegana (Steganina), Wheeler, 1960

Wang, Le, Gao, Jian-Jun & Chen, Hong-Wei, 2013, Ten new species of the subgenus Steganina (Diptera: Drosophilidae: Stegana) from southern China, Journal of Natural History (J. Nat. Hist.) 47 (29 - 30), pp. 1993-2013 : 1994-1995

publication ID	https://doi.org/ 10.1080/00222933.2012.763055
persistent identifier	https://treatment.plazi.org/id/038EBF77-FFD0-187C-FE78-9774C27FFC20
treatment provided by	Felipe
scientific name	Stegana (Steganina)
status

Treatment

Subgenus Steganina Wheeler View in CoL

Steganina Wheeler, 1960: 110 View in CoL . Type species: Musca coleoptrata Scopoli, 1763 .

Diagnosis

Eye roundish and longest axis oblique to body axis; face yellow, with black band(s); facial carina absent or present above; palpus mostly slender and yellow, sometimes black distally; surstylus anterodorsally separated from epandrium (modified from Bächli et al. 2004).

Description

Ocellar triangle black, with a pair of small setae above ocellar setae. Postvertical setae slightly behind vertex ridge. Frons and face rectangular in profile. Frons shiny, with sporadic minute setulae and one black band (horizontal) on lower part (above ptilinal fissure). Proclinate orbital setae distinctly nearer to ptilinal fissure than to inner vertical setae. Facial carina mostly narrow and developed on upper part [as in Stegana (Steganina) nigrifrons de Meijere, 1991 ( Okada 1971) ]. Palpus yellow, with four or five longer setae distally and several shorter setae basally. Gena yellow, broad (ch / o ≥ 0.15). Vibrissa prominent; other subvibrissal setae small. Occiput brown. Scutum flat, brownish yellow, white-yellow on prothorax. Postpronotal lobe white-yellow, with one or two longer and a few small setae. Acrostichal setulae in approximately 10 irregular rows. Pleura with one black longitudinal stripe above (running from propleuron to base of haltere), mostly yellowish. Prescutellar setae one pair. Scutellum usually black, yellow at tip; basal scutellar setae divergent; apical scutellars cruciate. Wing brown anteriorly, paler posteriorly, slightly dark on all crossveins, not paler at tip. Basal medial-cubital crossvein present; C 1 setae 2, less differentiated. Costal vein with six to eight minute spinules on ventral surface between R 2+3 and R 4+5. R 2+3 markedly curved to costa at tip; R 4+5 and M 1 convergent distally. Halteres grey-brown basally, white distally. Legs white to yellowish, dark brown at fore knee, distal half of mid and hind femora and basal half of mid and hind tibiae. Fore femur with one row of 4, 5 suberect setae on posterior surface and one row of five suberect setae on ventral surface. Mid tibia with strong apical seta. Preapical dorsal setae present on all tibiae. Mid tarsus with five strong, suberect setae on basal part of dorsal surface. Mid and hind tarsomeres with two and one rows of minute cuneiform setulae on ventral surface, respectively; fore and hind first tarsomeres slightly shorter than the rest combined; mid first tarsomere longer than the rest combined. Abdominal tergites and sternites mostly brown to black; sternites broadened, wider than length. Male terminalia: Epandrium pubescent except for anterior and ventral margins, with dense setae on dorsal to posterolateral portion of each body side ( Figures 1A View Figure 1 – 10A View Figure 10 ). Cercus setigerous, sometimes lacking pubescence ( Figures 1A View Figure 1 – 10A View Figure 10 ). Surstylus separated from epandrium, usually with numerous serrated, minute processes distally and one prensiseta on apical margin ( Figures 1A View Figure 1 – 10A View Figure 10 , 2B View Figure 2 , 6B View Figure 6 , 9B View Figure 9 ). Tenth sternite connected with surstyli basolaterally. Hypandrium broadened and connected with base of aedeagus by articulating plate on inner side ( Figures 1D View Figure 1 , 2E View Figure 2 , 3D View Figure 3 – 5D View Figure 5 , 6E View Figure 6 , 7D View Figure 7 , 8D View Figure 8 , 9E View Figure 9 , 10D View Figure 10 ). Gonopods strongly sclerotized, mostly with one dorsal projection apically ( Figures 1C, D View Figure 1 , 2F View Figure 2 , 3E, F View Figure 3 , 4C, D View Figure 4 , 5D, E View Figure 5 , 6F, G View Figure 6 , 7C, D View Figure 7 , 8D, E View Figure 8 , 9F, G View Figure 9 , 10E, F View Figure 10 ). Paramere fused with hypandrium ( Figures 1C, D View Figure 1 , 2D, E View Figure 2 , 3C, D View Figure 3 , 4C, D View Figure 4 , 5C, D View Figure 5 , 7C, D View Figure 7 , 8C, D View Figure 8 , 9D, E View Figure 9 , 10C, D View Figure 10 ), sometimes absent or undistinguishable ( Figure 6D, E View Figure 6 ). Aedeagus developed, basally fused with aedeagal apodeme ( Figures 1C, D View Figure 1 , 2D, E View Figure 2 , 3C, D View Figure 3 , 4C, D View Figure 4 , 5C, D View Figure 5 , 6D, E View Figure 6 , 7C, D View Figure 7 , 8C, D View Figure 8 , 9D, E View Figure 9 , 10C, D View Figure 10 ). Aedeagal apodeme usually strong ( Figures 1C, D View Figure 1 , 2D, E View Figure 2 , 3C, D View Figure 3 , 4C, D View Figure 4 , 5C, D View Figure 5 , 7C, D View Figure 7 , 8C, D View Figure 8 , 9D, E View Figure 9 , 10C, D View Figure 10 ).