Stegana (Steganina) melanostoma, 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 : 57-58

publication ID

https://doi.org/ 10.5281/zenodo.184336

DOI

https://doi.org/10.5281/zenodo.6231282

persistent identifier

https://treatment.plazi.org/id/9B2887D7-FF83-BB46-FF3D-BF60FDE0FDE4

treatment provided by

Plazi

scientific name

Stegana (Steganina) melanostoma
status

sp. nov.

Stegana (Steganina) melanostoma View in CoL sp. nov.

( Figs 1–6 View FIGURES 1 – 6 )

Specimens examined. Holotype ɗ (SCAU, No. 120293), CHINA – labeled “Shennongjia, Hubei, 31°29' N, 110°18' E, 1700 m a.s.l., 1.viii.2005, on tree trunk, H.W. Chen”.

Etymology. A combination of the Greek words “melas + stoma”, referring to the black clypeus. Diagnosis. Tenth sternite (decasternum) roundly protruded dorsally, with pubescence distally ( Fig. 3 View FIGURES 1 – 6 ); aedeagus with numerous furrows and serration processes distally ( Fig. 5 View FIGURES 1 – 6 ); gonopods roundly vaulted ( Fig. 6 View FIGURES 1 – 6 ).

Description. Male: Frons brown, shiny, with 1 black band and sporadic, minute setulae on lower part (above ptilinal fissure). Face black, with 1 yellow band medially; facial carina slight on upper part. First flagellomere almost yellow, black on distal 1/4. Clypeus almost black. Palpus yellow on basal 2/3, black on distal 1/3. Gena white-yellow. Scutum dark brown medially, brown laterally. Katepisternum entirely white. Scutellum entirely black. Wing dark grey-brown anteriorly, slightly paler posteriorly, not paler at tip. Legs white to yellowish, dark brown at fore knees, distal half of mid and hind femora and basal half of mid and hind tibiae. Fore femur with 4 strong suberect setae on distal part of ventral surface. Abdominal tergites dark brown. Male terminalia: Epandrium pubescent except for ventral margin, with ca. 26 setae on dorsal to posterolateral portion per side ( Fig. 1 View FIGURES 1 – 6 ). Surstylus distally with numerous setae on outer surface ( Fig. 2 View FIGURES 1 – 6 ). Tenth sternite strongly sclerotized basally ( Fig. 3 View FIGURES 1 – 6 ). Cercus setigerous, lacking pubescence ( Fig. 1 View FIGURES 1 – 6 ). Hypandrium anteromedially protruded and connected with base of aedeagus by articulating plate (median flaps, Figs. 4, 5 View FIGURES 1 – 6 ). Paramere reduced, with ca. 2 setulae ( Figs. 4, 5 View FIGURES 1 – 6 ). Aedeagus with thin tentacle-like setae along apical margin ( Figs. 4, 5 View FIGURES 1 – 6 ).

Measurements. BL = 2.79 mm; ThL = 1.58 mm; WL = 2.63 mm; WW = 1.13 mm. Indices: arb = 7/6, avd = 0.71, adf = 1.55, flw = 1.64, FW/HW = 0.45, ch/o = 0.15, prorb = 1.11, rcorb = 0.90, vb = 0.44, dcl = damaged, presctl = damaged, sctl = damaged, sterno = 0.80, orbito = 1.86, dcp = 0.21, sctlp = 1.86, C = 2.01, 4c = 1.34, 4v = 1.83, 5x = 0.85, ac = 15.50, M = 0.38, C3F = 0.70.

Distribution. China (Hubei).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Drosophilidae

Genus

Stegana

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