Stegana (Oxyphortica) zhulinae Wang and Chen, 2018

Huang, Jia, Wang, Nan-Nan, Zhang, Yuan & Chen, Hong-Wei, 2018, Stegana (Oxyphortica) convergens species group (Diptera: Drosophilidae) from the Oriental region, with morphological and molecular evidence, Journal of Natural History 52 (21 - 24), pp. 1473-1492 : 1487-1489

publication ID	https://doi.org/ 10.1080/00222933.2018.1478010
publication LSID	lsid:zoobank.org:pub:8AC2D398-96F2-4EE5-AE0D-16B8761BD55D
persistent identifier	https://treatment.plazi.org/id/7275CE77-FFA5-FFBD-D22F-FB02A9B7FAFE
treatment provided by	Felipe
scientific name	Stegana (Oxyphortica) zhulinae Wang and Chen
status	sp. nov.

Treatment

Stegana (Oxyphortica) zhulinae Wang and Chen , sp. nov.

( Figures 4 View Figure 4 (f – h) and 8)

Diagnosis

This species strongly resembles S. mediospinosa Cheng et al. 2010 in male terminalia and colour patterns of abdominal tergites, but can be distinguished from the latter by surstylus and gonopod; surstylus with 2 prensisetae submedially ( Figure 8 View Figure 8 (b)); dorsal process of gonopod slightly rounded in lateral view ( Figure 8 View Figure 8 (d)). In S. mediospinosa : surstylus with 1 prensiseta submedially (as in Cheng et al. 2010, fig. 2); dorsal process of gonopod acute in lateral view (as in Cheng et al. 2010, fig. 4).

Description

Male and female: Frons mostly brown. First flagellomere brown. Clypeus black. Palpus brownish. Mesoscutum yellow medially, greyish yellow laterally. Scutellum yellow basally, brownish distally. Pleura yellow below. Abdominal 2nd to 5th tergites yellow medially,

brownish to dark brown laterally, sometimes with caudal bands on 3rd to 5th tergites and protruded medially; 6th tergites yellow anteriorly, black posteriorly ( Figure 4 View Figure 4 (f – h)).

Measurements

BL = 2.87 mm in the holotype (in 5 male and 5 female paratypes: 2.17 – 3.07 mm in males, 2.67 – 3.91 mm in females), THL = 1.23 (0.93 – 1.47 in males, 1.20 – 1.67 in females), WL = 2.13 (1.83 – 2.47 in males, 2.06 – 2.97 in females), WW = 1.00 (0.80 – 1.10 in males, 0.93 – 1.33 in females), arb = 6/4 (5 – 7/3 – 5), avd = 0.82 (0.57 – 1.00), adf = 2.20 (1.57 – 2.60), flw = 2.20 (1.43 – 2.20), FW/HW = 0.41 (0.39 – 0.48), ch/o = 0.11 (0.10 – 0.19), prorb = 1.13 (1.00 – 1.38), rcorb = 0.75 (0.67 – 0.88), vb = 0.50 (0.33 – 0.60), dcl = 0.50 (0.36 – 0.58), presctl = 0.60 (0.44 – 0.67), sctl = 1.12 (0.94 – 1.31), sterno = 0.90 (0.64 – 1.00), orbito = 2.00 (1.67 – 2.00), dcp = 0.31 (0.19 – 0.31), sctlp = 1.00 (0.80 – 1.17), C = 2.86 (2.62 – 3.14), 4c = 0.78 (0.75 – 1.00), 4v = 1.72 (1.65 – 2.08), 5x = 1.14 (1.11 – 1.60), ac = 3.50 (3.50 – 4.50), M = 0.44 (0.40 – 0.62), C3F = 0.86 (0.75 – 0.90).

Type specimens

Holotype male ( SCAU, No. 124584), CHINA: Nabang, Yingjiang , Yunnan, 24.667°N, 97.583°E, altitude 700 m, 17 May 2016, swept over tussock, L Zhu GoogleMaps . Paratypes: 5 males, 1 female ( SCAU, Nos. 124585 – 90), 17 May 2016 and 19 August 2016, HW Chen, L Gong, J Huang, YQ Liu, YL Wang, L Zhu, other data same as holotype; 2 males ( SCAU, Nos. 124591, 92), Nanling, Lancang, Yunnan, 22.800°N, 99.917°E, altitude 1860 m, 18 August 2016, swept over tussock, HW Chen, L Gong; 20 males, 8 females ( KIZ, Nos. 0088099 – 126) and 26 males, 10 females ( SCAU, Nos. 124593 – 628), Xincheng, Yingjiang, Yunnan, 24.767°N, 98.183°E, altitude 960 m, 18 August 2016, swept over tussocks and tree trunks, HW Chen, L Gong, YQ Liu; 26 males, 10 females ( SCAU, Nos. 124629 – 64), Husa, Longchuan, Yunnan, 24.450°N, 97.750°E, altitude 1230 m, 20 August 2016, swept over tussocks and tree trunks, HW Chen, L Gong, YQ Liu; 8 males ( SCAU, Nos. 124665 – 70, 111475, 76), Botanic Garden Ruili, Yunnan, 24.017°N, 97.850° E, altitude 1170 m, 6 November 2011, 22 August 2016, swept over tussocks, HW Chen, L Gong, YQ Liu; 1 male ( SCAU, No. 111477), Moli Forest Park, Ruili , Yunnan, 24.125°N, 97.975°E, altitude 920 m, 5 November 2017, swept over tussock, L Gong GoogleMaps .

Etymology

Patronym after the collector Ms Lin Zhu (SCAU).

Distribution

China (Yunnan).

Key to all species of the Stegana (Oxyphortica) convergens View in CoL group

1. Surstylus dorsally to submedially with 1 or 2 sclerotised, pointed prensiseta(e) ( Figures 5 – 8 View Figure 5 View Figure 6 View Figure 7 View Figure 8 (b)); parameres small, fused with each other basally ( Figures 5 – 8 View Figure 5 View Figure 6 View Figure 7 View Figure 8 (c, d)); aedeagus with tentacle-like processes apically ( Figures 5 – 8 View Figure 5 View Figure 6 View Figure 7 View Figure 8 (c, d)); gonopods basally fused with each other, distally separated into 2 lobe-like processes: ventral process bearing dense hairs along margins; dorsal process curved dorsad, more or less pointed apically ( Figures 5 – 8 View Figure 5 View Figure 6 View Figure 7 View Figure 8 (c, d)) ( Cheng et al. 2010)......................... ............................................................ convergens View in CoL group ............................................................ 2

– Surstylus without sclerotised, pointed prensiseta or with small apically rounded prensiseta(e) dorsally; parameres absent or separated from each other; aedeagus without tentacle-like processes apically; gonopods almost entirely fused to each other or each of them distally protruding out a rod-like or lobe-like process lacking hair along margin. .............................................................................. other Oxyphortica View in CoL species

2. Surstylus with 2 pointed projections posteroventrally. ....................................................... 3

– Surstylus without projection posteroventrally......................................................................... 5

3. Surstylus with 2 strong prensisetae dorsally (as in Cheng et al. 2010, fig. 6). ............................ ................................................................................................ apicopubescens Cheng, Xu and Chen, 2010 View in CoL

– Surstylus with only 1 strong prensiseta dorsally ( Figure 6 View Figure 6 (b)) ........................................ 4

4. Surstylus with 2 separated projections posteroventrally ( Figure 6 View Figure 6 (b), prs); dorsal lobe of gonopod glabrous subapically.................................. gonglui Wang and Chen , sp. nov.

– Surstylus with 2 adjacent projections posteroventrally (as in Cheng et al. 2010, fig. 10); dorsal lobe of gonopod with several serrated processes subapically ............... .......................................................................................... apicosetosa Cheng, Xu and Chen, 2010 View in CoL

5. Surstylus with 1 prensiseta dorsally ( Figures 5 View Figure 5 (b) and 7(b)) ............................................ 6 Surstylus without prensiseta dorsally ( Figure 8 View Figure 8 (b)). .............................................................. 8

6. Dorsal prensiseta of surstyli strongly curved inward and interlaced reciprocally ( Figures 5 View Figure 5 (b) and 7(b)) ...................................................................................................................... 7

– Dorsal prensiseta of surstyli neither curved inward nor interlaced reciprocally (as in Zhang et al. 2014, fig. 1(B)) .................................................... convergens ( de Meijere, 1911) View in CoL

7. Gonopod deeply narrowed between the ventral and dorsal processes ( Figure 5 View Figure 5 (c,d)): ventral process with long hairs along apical margin.............. setifrons Sidorenko 1997 View in CoL

– Gonopod slightly concave between the ventral and dorsal processes ( Figure 7 View Figure 7 (c,d)): ventral process with sparse, short hairs along apical margin ................................................ ............................................................................................. xiaoyangae Zhang and Chen , sp. nov.

8. Surstylus with 1 prensiseta submedially (as in Cheng et al. 2010, fig. 2); dorsal process of gonopod acute in lateral view (as in Cheng et al. 2010, fig. 4) ..................... ...................................................................................... mediospinosa Cheng, Xu and Chen, 2010 View in CoL

– Surstylus with 2 prensisetae submedially ( Figure 8 View Figure 8 (b)); dorsal process of gonopod slightly rounded in lateral view ( Figure 8 View Figure 8 (d)) ....... ....... zhulinae Wang and Chen , sp. nov.