Stegana (Steganina) psilolobosa, Chen, Xi-Peng & Chen, Hong-Wei, 2008

Chen, Xi-Peng & Chen, Hong-Wei, 2008, The Stegana coleoptrata species group (Diptera: Drosophilidae) from mainland China, Zootaxa 1891, pp. 55-65 : 60

Stegana (Steganina) psilolobosa sp. nov.

( Figs 19–24 )

Specimens examined. Holotype ɗ (SCAU, No. 120292): CHINA – labeled “Shennongjia, Hubei, 1700 m, 1.viii.2005, on tree trunk, H.W. Chen”.

Etymology. A combination of the Greek words “psilos + lobos”, referring to the medial flaps of hypandrium lacking pubescence.

Diagnosis. Gonopods distinctly widely protruded dorso-medially ( Fig. 24 ); aedeagus with 1 pair of expanded lobe-like process ventrobasally ( Figs. 22, 23 ).

Description. Some characters commonly seen in S. melanostoma sp. nov. are not referred to in the following description. Male: First flagellomere yellow on basal half, black on distal half. Clypeus almost yellow. Palpus entirely yellow. Legs white to yellowish, dark brown on fore knees, distal half of mid femur and basal half of mid tibia, distal 1/3 of hind femur and basal 1/3 of hind tibia. Fore femur with 4 long suberect setae on distal part of ventral surface. Male terminalia: Epandrium with ca. 27 setae on dorsal to posterolateral portion per side ( Fig. 19 ). Tenth sternite protruded posteromedially, with 1 small projection ventrally ( Fig. 21 ). Paramere with ca. 3 setulae ( Figs. 22, 23 ).

Measurements. BL = 2.74 mm; ThL = 1.55 mm; WL = 2.44 mm; WW = 0.92 mm. Indices: arb = 7/6, avd = 0.77, adf = 1.30, flw = 1.80, FW/HW = 0.45, ch/o = 0.12, prorb = 1.11, rcorb =?, vb = 0.44, dcl = 0.38, presctl = 0.44, sctl = 1.95, sterno = 0.95, orbito = 1.83, dcp = 0.20, sctlp = 2.00, C = 1.88, 4c = 1.13, 4v = 1.65, 5x = 0.90, ac = 17.33, M = 0.37, C3F = 0.71.

Distribution. China (Hubei).

Figures

FIGURES 19 – 24. Stegana (Steganina) psillobosa sp. nov., male genitalia: 19. epandrium, surstylus and cercus; 20. surstylus; 21. 10 th sternite; 22. hypandrium, paramere, aedeagus and aedeagal apodeme; 23. ditto; 24. gonopods (For orientation, abbreviations and scale lines see Figs. 1 – 6).