Nine new species of the subgenus Stegana (Oxyphortica) from the Oriental region, with morphological and molecular evidence based on Chinese species (Diptera: Drosophilidae) Author Wang, Nannan Author Zhang, Yuan Author Cheng, Yu Author Chen, Hongwei text Journal of Natural History 2017 2017-09-14 51 33 - 34 1943 1970 http://dx.doi.org/10.1080/00222933.2017.1360960 journal article 10.1080/00222933.2017.1360960 1464-5262 5182851 2FA403F6-5535-40A4-9FD0-ADB9913EDE83 Stegana ( Oxyphortica ) maichouensis Sidorenko (Figures 2(e), 4(a), 5(f) and 7) Stegana ( Oxyphortica ) maichouensis Sidorenko, 1998: 289 . Diagnosis Surstylus with two long prensisetae (one each basally and apically) ( Figure 7 (a, b)); gonopods with three strongly sclerotized, suberect processes dorsoapically, the median bifurcate ( Figure 7 (e)). The 8.4% interspecific genetic distance to S . ( O ). triodonta sp. nov. is one of the smallest interspecific distances ascertained within this subgenus; see under that species. Description Clypeus brown. Palpus yellow. Mesoscutum yellow anteromedially, yellowish brown laterally and posteriorly ( Figure 4 (a)). Scutellum yellowish brown, yellow at tip ( Figure 4 (a)). Katepisternum yellow. Wing yellowish, brownish anterodistally (Figure 2 (e)). Abdominal tergites: 1st yellow; 2nd yellow submedially, with one brownish patch medially, dark brown on lateral and posterior margins; 3rd to 5th yellow on anterior margin, dark brown on posterior margins; 6th yellow medially, dark brown laterally ( Figure 5 (f)). Male terminalia: Epandrium undeveloped on posterolateral corners, with 1.13, rcorb = 0.47–0.73, vb = 0.36–0.70, dcl = 0.34–0.52, presctl = 0.39–0.56, sctl = 1.10– 1.33, sterno = 0.71–0.95, orbito = 1.43–2.00, dcp = 0.20–0.32, sctlp = 0.80–0.93, C = 2.50– 3.27, 4c = 0.71–0.94, 4v = 1.77–2.39, 5x = 1.36–1.82, ac = 4.80–6.20, M = 0.50–0.70, C3F = 1.00. Figure 2 . Wing ( same in male and female ) . ( a ) Stegana ( Oxyphortica ) acutipenis Xu , Gao and Chen , 2007 ; ( b ) S . ( O . ) adentata Toda and Peng , 1992 ; ( c ) S . ( O . ) hirtipenis Xu , Gao and Chen , 2007 ; ( d ) S . ( O . ) latipenis Xu , Gao and Chen , 2007 ; ( e ) S . ( O . ) maichouensis Sidorenko , 1998 ; ( f ) S . ( O . ) chuanjiangi Zhang and Chen , sp . nov . ; ( g ) S . ( O . ) dainuo Wang and Chen , sp . nov . ; ( h ) S . ( O . ) dawa Zhang and Chen , sp . nov . dense pubescence and setae ( Figure 7 ( a )) . Cercus lacking pubescence ( Figure 7 ( a )) . Surstylus small , lobe-shaped , with several small setae distally ( Figure 7 ( a , b )) . Parameres absent ( Figure 7 ( c , d )) . Aedeagus strongly broadened mediolaterally and sclerotized except peristome , haired along peristome ( Figure 7 ( c , d )) . Measurements BL = 2.67 – 2.93 mm in fi ve males , 2.83 – 3.53 mm in fi ve females , ThL = 1.30 – 1.47 mm in males , 1.20 – 1.57 mm in females , WL = 2.10 – 2.30 mm in males , 2.07 – 2.60 mm in females , WW = 0.97 – 1.07 mm in males , 0.93 – 1.20 mm in females , arb = 5 – 7 / 3 – 5 , avd = 0.67 – 0.87 , adf = 2.60 – 3.25 , fl w = 2.00 – 2.80 , FW / HW = 0.36 – 0.47 , ch / o = 0.09 – 0.13 , prorb = 0.95 – Figure 3. (a – d) Wing (same in male and female). (a) Stegana (Oxyphortica) laohlie Zhang and Chen , sp. nov. ; (b) S. (O.) luchun Wang and Chen , sp. nov. ; (c ) S. (O.) mengwan Wang and Chen , sp. nov. ; (d) S. (O.) triodonta Cheng and Chen , sp. nov. (e – h) Dorsal view of thorax (same in male and female): (e) S. (O.) acutipenis Xu, Gao and Chen, 2007 ; (f) S. (O.) adentata Toda and Peng, 1992 ; (g) S. (O.) hirtipenis Xu, Gao and Chen, 2007 ; (h) S. (O.) latipenis Xu, Gao and Chen, 2007 . Figure 4. Dorsal view of thorax (same in male and female): (a) Stegana (Oxyphortica) maichouensis Sidorenko, 1998 ; (b) S. (O.) chuanjiangi Zhang and Chen , sp. nov. ; (c) S. (O.) dainuo Wang and Chen , sp. nov. ; (d) S. (O.) dawa Zhang and Chen , sp. nov. ; (e) S. (O.) laohlie Zhang and Chen , sp. nov. ; (f) S. (O.) luchun Wang and Chen , sp. nov. ; (g) S. (O.) mengwan Wang and Chen , sp. nov. ; (h) S. (O.) triodonta Cheng and Chen , sp. nov. Figure 5. Abdominal tergites patterns (same in male and female): (a, b) Stegana (Oxyphortica) acutipenis Xu, Gao and Chen, 2007 ; (c) S. (O.) adentata Toda and Peng, 1992 ; (d) S. (O.) hirtipenis Xu, Gao and Chen, 2007 ; (e) S. (O.) latipenis Xu, Gao and Chen, 2007 ; (f) S. (O.) maichouensis Sidorenko, 1998 ; (g) S. (O.) chuanjiangi Zhang and Chen , sp. nov. ; (h) S. (O.) dainuo Wang and Chen , sp. nov. ; (i) S. (O.) dawa Zhang and Chen , sp. nov. Figure 6. Abdominal tergites patterns (same in male and female): (a) Stegana (Oxyphortica) laohlie Zhang and Chen , sp. nov. ; (b) S. (O.) luchun Wang and Zhang , sp. nov. ; (c) S. (O.) mengwan Wang and Zhang , sp. nov. ; (d) S. (O.) triodonta Cheng and Chen , sp. nov. ; (e) colour legend. Specimens examined China : nine males , two females ( SCAU , Nos. 121460–70), Menglun , Mengla , Yunnan , 21°41 ʹ N , 101°25 ʹ E , altitude 680 m , 6 September 2002 , 17 April 2007 , 10 April 2010 , ex tree trunks and tussock, HW Chen , JJ Gao , YR Su ; 23 males , 20 females ( five males , five females in KIZ , Nos. 0088127–36; 18 males , 15 females SCAU , 124670–702), Mengyuan , Mengla , Yunnan , 21° 47 ʹ 29 ʹ ’N, 101°22 ʹ 59 ʹ ’E, altitude 990 m , 6–7 August 2016 , ex tree trunks and tussock, HW Chen , L Gong , YQ Liu . Distribution China ( Yunnan ); Vietnam .