Hirtodrosophila zouae Chen, Katoh & Gao, 2019

Chen, Yu, Katoh, Takehiro K. & Gao, Jian-Jun, 2019, The Hirtodrosophila melanderi species group (Diptera: Drosophilidae) from the Huanglong National Nature Reserve, Sichuan, China, Zootaxa 4623 (1), pp. 113-131 : 127

Hirtodrosophila zouae Chen, Katoh & Gao , sp. nov.

( Figs 3 E–H, 5G–L, 9)

Diagnosis. Cercus ventrally with numerous black, thick spines including ca. four long, inner marginal ones ( Fig. 9D ). Aedeagus apically with large membranous process which tapering distally in lateral view, subapically swollen dorsally, with a pair of lateral processes, with a pair of lateral processes and a series of small acute projections ventrally ( Fig. 9 I–M); lateral processes small, flat, finely serrate on dorsal margin ( Fig. 9I, L, M ).

Description (characters commonly seen in H. zhangae sp. nov. not repeated) (♂). Head ( Figs 3E, F , 5 G–L): Gena yellowish brown to brown, anteriorly dark brown. First flagellomere grayish yellow; arista with five dorsal branches. Supracervical setae 13–16 per side; postocular setae 26–29 per side. Cibarium with ca. seven medial and ca. 18 posterior sensilla per side.

Thorax ( Fig. 3E, F ): Postpronotal lobe yellowish brown. Mesonotum yellowish brown to brown; stripes sometimes very indistinct.

Male terminalia ( Fig. 9 ): Epandrium with ca. 38 long setae per side. Cercus with ca. 36 long setae. Surstylus ventrally tapered with upper row of ca. eight prensisetae, and lower row of 7−8 prensisetae; inner surface with ca. 24 long setae; anterior margin with ca. seven short setulae. Paramere apically with ca. five minute sensilla. Aedeagal apodeme slightly curved, about 1/2 length of aedeagus.

Measurements (in mm): BL = 3.06 in holotype (range in 2♂ paratypes: 2.56–3.00), ThL = 1.24 (1.14–1.22), WL = 3.24 (2.94–3.24), WW = 1.40 (1.28–1.38).

Indices: FW/HW = 0.52 (range in 2♂ paratypes: 0.49–0.52), ch/o = 0.22 (0.15–0.19), prorb = 0.74 (0.79–0.83), rcorb = 0.32 (0.32–0.39), vb = 0.41 (0.38–0.43), orbito = 0.75 (0.54–0.64), dcl = 0.64 (0.52–0.56), sctl = 1.08 (1.06–1.08), sterno = 0.72 (0.64–0.66), dcp = 0.42 (0.46–0.49), sctlp = 1.35 (1.11–1.18), C = 3.42 (3.33), 4c = 0.67 (0.67–0.69), 4v = 1.44 (1.44–1.47), 5x = 1.28 (1.30–1.36), ac = 2.08 (2.45–2.50), M = 0.41 (0.38–0.42), C3F = 0.35 (0.33–0.37).

Holotype. ♂ (#06468), CHINA: Danyunxia Station, Huanglong Nature Reserve, Ngawa , Sichuan, 32°43'36" N, 104°02'55" E, 2,140 m, 16.ix.2018, ex banana trap, J.J. Gao, W.F. Zhang, and Y.F. Zou.

Paratypes. CHINA: 2♂ (#06469, #06471), same data as holotype .

Distribution. China (Sichuan).

Etymology. Patronym, in honor of Ms. Yu-Fang Zou (IBCAS) for help in field collection.

Figures

FIGURE 3. Left lateral habitus, head and thorax (dorsal view), wing (left ventral or right dorsal view), and abdomen (dorsal view). A−D, H. zhangae sp. nov. (holotype #06470); E−H, H. zouae sp. nov. (holotype #06468); I−L, H. nigrispina sp. nov. (holotype #06472).

FIGURE 5. Head (anterior view), postocciput (posterior view), cibarium (dorsal and lateral view), and prementum (ventral and lateral view). A−F, H. zhangae sp. nov. (holotype #06474); G−L, H. zouae sp. nov. (holotype #06471); M−R, H. nigrispina sp. nov. (paratype #06473).

FIGURE 9. Hirtodrosophila zouae sp. nov. (A−M: holotype #06468). A, B, periphallic organs (posterior and posterolateral view, respectively); C, ventral lobe of epandrium (lateral view); D, cerci (ventral view); E, dorsal part of surstylus (posterolateral view); F, inner surface of surstylus (posterolateral view); G, H, 10th sternite (anterior and dorsal view, respectively); I−K, phallic organs (ventral, ventrolateral, and lateral view, respectively); L, aedeagus and sensilla of paramere (ventral view); M, aedeagus (lateral view; red arrows point at lateral process and ventral small projections).