Species diversity of the subgenus Amiota (s. str.) Loew, 1862 (Diptera, Drosophilidae) in southern China Author Chen, Hong-Wei Author Watabe, Hide-Aki Author Gao, Jian-Jun Author Takamori, Hisaki Author Zhang, Ya-Ping Author Aotsuka, Tadashi text Journal of Natural History 2005 2007-02-21 39 3 265 310 http://dx.doi.org/10.1080/00222930310001657883 journal article 10.1080/00222930310001657883 1464-5262 4657896 Amiota ( Amiota ) arcuata Chen and Watabe , sp. nov. ( Figure 13 ) Diagnosis. Vertical lobe of gonopod large, broadened, width as long as height, much sclerotized on distal part ( Figure 13C ). Description Wing. Wing with ca 21–22 minute, peg-like spinules on ventral surface of costal vein between R 2+3 and R 4+5 . Leg. Hind femur with six or seven long setae postero-ventrally; hind tibia with eight or nine setae ventrally. Male terminalia. Epandrium entirely separated laterally at mid-dorsal portion, with ca 15– 16 setae near posterior to ventral margins ( Figure 13A ). Surstylus pubescent medially, not expanded at postero-ventral corner, with several tiny setae on medial mesal surface, five prensisetae on distal margin, several thin setae on distal margin to inner surface ( Figure 13B ). Anterior portion of hypandrium thin ( Figure 13C ). Parameres with ca six or seven sensilla on medial mesal surface; apical process long, strongly sclerotized; lateral process pointed, slightly sclerotized ( Figure 13D, E ). Ejaculatory apodeme: apical plate with ca four pits on each lateral margin; stalk thick, long ( Figure 13F ). Measurements. BL 53.30 mm in holotype (2 „ paratypes : 3.10–3.33); ThL 51.30 mm (1.20–1.24); WL53.00 mm (2.77–2.85); WW 51.33 mm (1.25–1.50). Figure 13. Amiota ( Amiota ) arcuata Chen and Watabe , sp. nov. „ (see Figure 12 for further explanation). Indices. arb54/3 (3–5/3–5), avd50.35 (0.30–0.35), adf51.20 (1.10), flw51.20 (1.20), FW/HW50.35 (0.35), ch/ o50.06 (0.07), prorb51.00 (?), rcorb50.70 (0.65), vb50.30 (0.30–0.35), dcl50.55 (0.55), presctl50.65 (0.60–0.65), sctl51.10 (1.10), sterno50.90 (0.90–0.95), orbito52.20 (2.00–2.20), dcp50.25 (0.28), sctlp51.10 (1.10), C52.14 (2.07–2.10), 4c51.38 (1.58–2.00), 4v52.48 (3.00–3.80), 5x51.00 (1.27–1.50), ac53.22 (3.33–3.75), M50.57 (0.74–1.00), C3F50.50 (0.61–0.63). HOLOTYPE : „ , Yunnan : Lake Lugu , 23 July 2001 , H. Watabe leg. ( KIZ ). PARATYPES : 2 „ , same data as the holotype except for J.-J. Gao and L.-P. He leg. ( DBSU and SEHU ) . Distribution. China ( Yunnan ). Relationship. This species resembles A. ( A. ) watabei in the shape of the vertical lobe of gonopod, but differs from it by the paramere with distinct lateral process (very small in watabei ). Etymology. Referring to the shape of the vertical lobe of gonopod. Amiota ( Amiota ) dehiscentia Chen and Watabe , sp. nov. ( Figure 14 ) Diagnosis. Vertical lobe of gonopod much sclerotized, separated medially ( Figure 14C ). Description Wing. Wing with ca 21–22 minute, peg-like spinules on ventral surface of costal vein between R 2+3 and R 4+5 . Leg. Hind femur with six long setae postero-ventrally; hind tibia with eight setae ventrally. Male terminalia. Epandrium entirely separated laterally at mid-dorsal portion, with ca 14 setae near posterior to ventral margins ( Figure 14A ). Surstylus glabrous on medial mesal surface, not expanded at postero-ventral corner, with five prensisetae on distal margin, and several thin setae on outer to inner surface ( Figure 14B ). Anterior portion of hypandrium thin ( Figure 14C ). Parameres lobe-shaped, separated from each other, apically with much-sclerotized, pointed process, laterally with less-sclerotized process, medially with ca six sensilla on mesal surface. Aedeagus separated into one pair of small rods, each fused to base of paramere; outer membrane undeveloped ( Figure 14E, D ). Ejaculatory apodeme: apical plate with ca three pits on each lateral margin; stalk thick, long ( Figure 14F ). Measurements. BL53.00 mm; ThL 51.26 mm ; WL 52.60 mm ; WW 51.13 mm . Indices. arb54/4, avd50.25, adf51.20, flw51.10, FW/HW50.35, ch/ o50.06 , prorb51.00, rcorb50.65, vb50.40, dcl50.60, presctl50.70, sctl51.10, sterno50.90, orbito52.20, dcp50.23, sctlp51.10, C51.93, 4c51.67,4v52.72, 5x51.20,ac53.75, M50.67, C3F50.63. HOLOTYPE : „ , Yunnan : Mt Jizu , 18 August 2000 , H.-W. Chen leg. ( KIZ ). Distribution. China ( Yunnan ). Relationship. This species surely belongs to the alboguttata species-group, but is very characteristic in having the vertical lobe of gonopod medially separated. Figure 14. Amiota ( Amiota ) dehiscentia Chen and Watabe , sp. nov. „ (see Figure 12 for further explanation). Etymology. Referring to the vertical lobe of gonopod separated medially.