Stegana (Steganina) saigusai, Chen & Gao & Chen, 2009

Chen, Xi-Peng, Gao, Jian-Jun & Chen, Hong-Wei, 2009, The Stegana shirozui species group (Diptera, Drosophilidae) from East Asia, Journal of Natural History 43 (31 - 32), pp. 1909-1927 : 1919-1921

Stegana (Steganina) saigusai sp. nov.

( Figures 42–48 )

Diagnosis

Surstylus with five prensisetae submedially ( Figure 43 ). Aedeagus slightly broadened apically in ventral view, glabrous on surface ( Figures 45, 46 ).

Description

Male terminalia: epandrium slightly protruded ventrally ( Figure 42 ). Tenth sternite slightly broadened distally, deeply separated basally ( Figure 44 ). Paramere with ca. three sensilla ( Figures 45, 46 ). Dorsal projection of gonopods rod-like, strongly dorsad protruded in lateral view ( Figure 48 ).

Measurements. BL = 2.69 mm in holotype (2.78 mm in / paratype), ThL = 1.44 mm (1.52 mm), WL = 2.47 mm (2.53 mm), WW = 1.03 mm (1.06 mm).

Indices. arb = 10/6 (9/5); avd = damaged (0.77); adf = damaged (1.86); flw = 2.00 (1.86); FW/HW = 0.41 (0.42); ch/o = 0.14 (0.14); prorb = damaged (0.86); rcorb = damage (0.50); vb = 0.44 (0.47); dcl = 0.49 (0.49); sctl = damaged (damaged); sterno = damaged (0.74); orbito = 1.83 (1.80); dcp = 0.21 (0.22); sctlp = 1.82 (1.63); C = 2.16 (2.30); 4c = 1.10 (1.03); 4v = 1.72 (1.56); 5x = 1.30 (1.60); ac = 16.00 (16.50); M = 0.45 (0.50); C3F = 0.70 (0.71).

Type material

Holotype: Ƌ, Japan: Kumamoto, Kyushu , 32°37′ N, 130°51′ E, altitude 1100m, 17 August 2002, HW Chen ( SCAU, No. 120317) . Paratype: one ♀, same data as holotype ( SCAU, No. 120586) .

Distribution

Japan (Kyushu).

Etymology

Patronym, in honour of Prof. T. Saigusa (Kyushu University, Japan).

Figures

Figures 42–48. Stegana (Steganina) saigusai sp. nov., Ƌ. (42) Epandrium, surstylus and cercus; (43) surstylus; (44) tenth sternite; (45, 46) hypandrium, aedeagus and aedeagal apodeme; (47, 48) gonopods. For orientation and organization see Figures 8–14. Scale bars: 0.1 mm.