Amiota (Amiota) arcuata Chen and Watabe, 2005

Chen, Hong-Wei, Watabe, Hide-Aki, Gao, Jian-Jun, Takamori, Hisaki, Zhang, Ya-Ping & Aotsuka, Tadashi, 2005, Species diversity of the subgenus Amiota (s. str.) Loew, 1862 (Diptera, Drosophilidae) in southern China, Journal of Natural History 39 (3), pp. 265-310 : 289-291

publication ID	https://doi.org/ 10.1080/00222930310001657883
persistent identifier	https://treatment.plazi.org/id/ED02879B-A066-7A5C-6742-FF0B6BBBFC74
treatment provided by	Carolina
scientific name	Amiota (Amiota) arcuata Chen and Watabe
status	sp. nov.

Treatment

Amiota (Amiota) arcuata Chen and Watabe View in CoL , sp. nov.

( Figure 13 View Figure 13 )

Diagnosis. Vertical lobe of gonopod large, broadened, width as long as height, much sclerotized on distal part ( Figure 13C View Figure 13 ).

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 View Figure 13 ). 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 View Figure 13 ). Anterior portion of hypandrium thin ( Figure 13C View Figure 13 ). Parameres with ca six or seven sensilla on medial mesal surface; apical process long, strongly sclerotized; lateral process pointed, slightly sclerotized ( Figure 13D, E View Figure 13 ). Ejaculatory apodeme: apical plate with ca four pits on each lateral margin; stalk thick, long ( Figure 13F View Figure 13 ).

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).

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 View Figure 14 )

Diagnosis. Vertical lobe of gonopod much sclerotized, separated medially ( Figure 14C View Figure 14 ).

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 View Figure 14 ). 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 View Figure 14 ). Anterior portion of hypandrium thin ( Figure 14C View Figure 14 ). 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 View Figure 14 ). Ejaculatory apodeme: apical plate with ca three pits on each lateral margin; stalk thick, long ( Figure 14F View Figure 14 ).

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.

Etymology. Referring to the vertical lobe of gonopod separated medially.