Stegana (Steganina) alianya, Wang & Lu & Zhang & Chen, 2021, Wang & Lu & Zhang & Chen, 2021

Wang, Ya-Lian, Lu, Jin-Ming, Zhang, Yuan & Chen, Hong-Wei, 2021, Molecular phylogeny, species delimitation and biogeographic history of the Stegana (Steganina) shirozui species group (Diptera: Drosophilidae) from East Asia, Zoological Journal of the Linnean Society 192, pp. 998-1016 : 1004-1006

STEGANA (STEGANINA) ALIANYA ZHANG & CHEN

( FIGS 4A, B , 5 )

Zoobank registration: u r n: l s i d: z o o b a n k. org:act: D4C1DA35-F9E7-4689-B6CD-FEC34B144A97

Holotype: ♂ ( SCAU, No. 124703), China: Wangtianshu Forest Park, Mengla , Yunnan, 21.615°N, 101.593°E, 660 m a.s.l. (above sea level), 9.v.2012, tree trunks, H.W. Chen.

Paratype: China: 1♀ ( SCAU, No. 124704), same data as holotype .

Etymology: The name alianya mean ‘sky tree’ in the language of the Dai People, referring to the tall rainforest trees that seem to touch the sky in the type locality of this species. It is a noun in apposition.

Diagnosis: This species resembles S. jianfenglingensis Chen et al., 2009 in male terminalia ( Fig. 5 ), but can be distinguished from the latter by aedeagus slightly broadened in ventral view, ventrally with a few finely serrated processes ( Fig. 5C, D ), and gonopods apically slightly protruded in ventral view ( Fig. 5E ). In S. jianfenglingensis : gonopods are apically pointed and the opening of aedeagus quadrate in ventral view, distally with numerous finely serrated processes (as figs 18, 19 in Chen et al., 2009).

Measurements: Body length (BL) = 3.13 mm in holotype (3.33 in paratype), thorax length (ThL) = 1.50 mm (1.70), wing length (WL) = 2.83 mm (3.27), wing width (WW) = 1.27 mm (1.40), dorsal branches/ventral branches of arista (arb) = 10/5 (8/5), longest ventral branch/longest dorsal branch of arista in length (avd) = 0.93 (0.85), longest dorsal branch of arista/width of first flagellomere (adf) = 2.00 (1.63), length/width of first flagellomere (flw) = 2.14 (2.13), frontal width/head width (FW/ HW) = 0.46 (0.46), maximum width of gena/maximum diameter of eye (ch/o) = 0.19 (0.18), proclinate orbital/ posterior reclinate orbital in length (prorb) = 1.06 (1.05), anterior reclinate orbital/posterior reclinate orbital in length (rcorb) = 0.74 (0.79), subvibrissal/vibrissa in length (vb) = 0.47 (0.47), anterior dorsocentral/posterior dorsocentral in length (dcl) = 0.52 (0.52), prescutellar/ posterior dorsocentral in length (presctl) = 0.61 (0.55), basal scutellar/apical scutellar in length (sct1) = 1.52 (in ♂ not counted due to damage), anterior katepisternal/ posterior katepisternal in length (sterno) = 0.91 (0.95), distance between proclinate and posterior reclinate orbitals/distance between inner vertical and posterior reclinate orbital (orbito) = 2.20 (1.83), distance between ipsilateral dorsocentrals/cross distance between anterior dorsocentrals (dcp) = 0.25 (0.24), distance between ipsilateral scutellars/cross distance between apical scutellars (sct1p) = 1.67 (1.53), second costal section between subcostal break and R 2 + 3 /third costal section between R 2 + 3 and R 4 + 5 (C) = 2.00 (2.13), third costal section between R 2 + 3 and R 4 + 5 /M 1 between r-m and dm-cu (4c) = 1.11 (1.15), M 1 between dm-cu and wing margin/M 1 between r-m and dm-cu (4v) = 1.84 (1.90), CuA 1 between dm-cu and wing margin / dm-cu between M 1 and CuA 1 (5×) = 1.57 (1.38), third costal section between R 2 + 3 and R 4 + 5 / distance between distal ends of R 4 + 5 and M 1 (ac) = 10.50 (11.50), CuA 1 between dm-cu and wing margin/ M 1 between r-m and dm-cu (M) = 0.58 (0.55), length of the strongly setose portion of the third costal section/length of whole third costal section (C3F) = 0.71 (0.61).

Description

Male and female. Head: Frons brown, with a black band below. First flagellomere black basally, yellow distally. Clypeus black medially, yellow laterally. Palpus yellow, slightly grayish apically. Thorax ( Fig. 4A , B): Mesoscutum brown (male) to dark brown (female), medially and laterally with yellow longitudinal strips. Scutellum brown (male) to dark brown (female).

Male terminalia ( Fig. 5 ): Epandrium ventrally slightly protruded. Cercus lacking pubescence. Surstylus submedially with ca. six prensisetae. Paramere lacking sensilla. Aedeagus with apically forked setae on opening. Gonopods dorsomedially with small glabrous projection.

Figures

Figure 4. Habitus ofholotypes.A,B.Stegana (Steganina) alianya sp. nov.; C, D. Stegana (Steganina) diodonta sp. nov.; E, F. Stegana (Steganina) zebromyia sp. nov.; G, H. Stegana (Steganina) zopheria sp. nov.

Figure 5. Stegana (Steganina) alianya sp. nov. A. epandrium (epan), cercus (cerc) and surstylus (sur, lateral view); B. surstylus (ventral view); C, D. hypandrium (hypd), parameres, aedeagus (aed) and aedeagal apodeme (aed a, ventral and lateral views); E, F. gonopods (gon, ventral and lateral views). Scale bars: 0.1 mm.