Stegana (Oxyphortica) aotsukai Chen & Wang 2004, new species
Creators: name: Chen, Hong-wei
name: Wang, Bao-cheng
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Stegana
Stegana aotsukai

description: Stegana (Oxyphortica) aotsukai, new species   
(Figs. 3-6)  
 Material examined. – Holotype male, CHINA: Mt. Wuyi, Fujian, 700 m, coll. H. - w. Chen, 17 Aug.2001 (KIZ).   
Paratypes - 2 males, 2 females, same data as holotype except for 15-19 Aug.2001 (SCAU).  
 Diagnosis. – Paramere narrowed distally, slightly hooked apically (Figs. 5, 6); aedeagus with 1 curved, lobe-shaped process basally (Fig. 5).   
 Description. – Thorax: Mesonotum yellow, with 3 black, longitudinal stripes per side: submedial and later stripes extend to prescutum; sublateral stripes short between scutal and scutellar sulci. Pleura yellow mostly, with 1 black, longitudinal stripe medially. Scutellum medially black, laterally yellow.   
Wing: Dark brown. Halter greyish black.  
Legs: Mid tibia basally with 2 long, strong postero-dorsal setae.  
Abdomen: Second to fourth tergites yellow to dark yellow on anterior margin, with laterally and medially protruded, black band on posterior margin; fifth and sixth nearly entirely black. Sternites yellow.  
Male terminalia: Epandrium not constricted mid-dorsally, with 1 row of long, strong setae and 2 rows of short setae along posterior margin (Fig. 3). Surstylus with several setae on distal margin, and 1 hole near posterior margin (Fig. 4). Aedeagus apically bifurcate (Fig. 6)  
For morphological terminology and index definitions, see Chen & Toda (2001) or Chen & Aotsuka (2003).  
Measurements: BL = 7.10 mm (holotype), paratypes range: 6.17 (male) to and 7.23 (female); ThL = 2.84 mm (2.64 male, 2.90 female); WL = 5.40 mm (5.33 male, 5.50 female); WW = 2.10 mm (2.00 male, 2.12 female).  
Indices: arb = 10/7 (10-11/6-7), avd = 0.85 (0.85), adf = 2.20 (2.30), flw = 2.60 (2.50-2.60), FW/HW = 0.40 (0.40-0.45), ch/o = 0.07 (0.07), prorb = 0.90 (0.90-0.95), rcorb = 0.55 (0.55), vb = 0.40 (0.40), dcl = 0.55 (0.55-0.60), sctl = 0.80 (0.80), sterno = 1.00 (1.00), orbito = 2.00 (1.90-2.00), dcp = 0.20 (0.20-0.23), presctl = 0.70 (0.70-0.75), sctlp = 1.20 (1.20-1.30), C = 2.58 (2.56-2.60), 4c = 0.73 (0.70-0.75), 4v = 1.22 (1.13-1.20), 5x = 0.53 (0.50-0.54), ac = 4.71 (4.70- 4.75), M = 0.18 (0.15-0.17), C3F = 1.00 (1.00).  
 Etymology. – The specific name is in honor of Dr. T. Aotsuka of the Department of Biology, Tokyo Metropolitan University, Japan (TMUJ).   
 Distribution. – China (Fujian).   
 Remarks. – This species resembles S. (O.) nigripennis in the many characters, but can be clearly distinguished from the latter by paramere distally narrowed and aedeagus basally with 1 curved process (paramere distally broad and aedeagus basally without curved process in nigripennis).
description: Published as part of Chen, Hong-wei & Wang, Bao-cheng, 2004, Stegana (Oxyphortica) Nigripennis Species-Group, With Descriptions Of Four New Species From Southeast Asia (Insecta: Diptera: Drosophilidae), pp. 29-36 in Raffles Bulletin of Zoology 52 (1) on pages 31-32, DOI: 10.5281/zenodo.4618889