Hirtodrosophila nigrispina Chen, Katoh & Gao,

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: 127-130

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Hirtodrosophila nigrispina Chen, Katoh & Gao

sp. nov.

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

( Figs 3View FIGURE 3 I–L, 5M–R, 10)

Diagnosis. Epandrial ventral lobe with apical acute projection ( Fig. 10DView FIGURE 10). Cercus ventrally with numerous black, thick spines nearly the same in size ( Fig. 10EView FIGURE 10). Aedeagus apically broadened, medial margin flat in ventral view, with a pair of lateral processes and medial membranous protrusion ( Fig. 10View FIGURE 10 J–L); lateral processes distally parallel with each other in ventral view, finely serrate on dorsal margin ( Fig. 10J, NView FIGURE 10).

Description (characters commonly seen in H. zhangae  sp. nov. not repeated) (♂, ♀). Head ( Figs 3I, JView FIGURE 3, 5View FIGURE 5 M–R): Frontal vitta brown. Fronto-orbital plate dark brown, anteriorly paler. Ocellar setae inserted slightly inside triangle made by ocelli. Face and facial carina brown, ventrally darker. Gena yellowish brown, anteriorly darker. First flagellomere dark grayish brown. Supracervical setae ca. 10 per side; postocular setae 23–26 per side. Clypeus brown to dark brown. Palpus pale grayish yellow, with one apical and 1–2 subapical, prominent setae. Cibarium with ca. seven medial and 23–25 posterior sensilla per side.

Legs ( Fig. 3IView FIGURE 3): Foreleg 1st tarsomere shorter than total length of four succeeding tarsomeres. Mid- and hindleg 1st tarsomeres slightly shorter than or as long as total length of four succeeding tarsomeres.

Abdomen ( Fig. 3I, LView FIGURE 3): Caudal bands medially often narrowed or interrupted.

Male terminalia ( Fig. 10View FIGURE 10 A–N): Epandrium with ca. 28 long setae per side. Cercus with 37–41 long setae, ventral ones thicker. Surstylus ventrally tapered and vent posteriad, with upper row of ca. six prensisetae, and lower row of ca. seven prensisetae; inner surface with ca. 18 long setae, anterior ones longer and thinner; anterior margin with ca. four short setulae. Tenth sternite anteromedially concaved, somewhat heart-shaped in ventral view. Paramere with ca. five minute sensilla along apical to dorsosubapical margin. Aedeagal apodeme straight, thin, much shorter than and fused to aedeagus.

Female terminalia ( Fig. 10View FIGURE 10 O–Q): Tergite VIII grayish brown to dark grayish brown, pubescent dorsally to caudolaterally. Oviscapt valve distally somewhat quadrate in lateral view, with ca. four lateral and ca. 16 marginal, peg-like ovisensilla. Spermathecal capsule slightly broader than long, with introvert about 4/5 height of capsule; introvert only scarcely wrinkled.

Measurements (in mm): BL = 2.88 in holotype (range in 4♀ paratypes: 2.94–3.45), ThL = 1.22 (1.24–1.29), WL = 3.34 (3.24–3.46), WW = 1.40 (1.38–1.52).

Indices: FW/HW = 0.52 (range in 4♀ paratypes: 0.49–0.50), ch/o = 0.26 (0.17–0.20), prorb = 0.74 (0.66–0.84), rcorb = 0.32 (0.27–0.44), vb = 0.40 (0.33–0.40), orbito = 0.64 (0.55–0.65), dcl = 0.60 (0.53–0.58), sctl = 1.18 (1.08–1.20), sterno = 0.40 (0.55–0.84), dcp = 0.47 (0.39–0.48), sctlp = 1.44 (1.12–1.16), C = 3.44 (3.15–3.38), 4c = 0.66 (0.66–0.73), 4v = 1.47 (1.43–1.55), 5x = 1.52 (1.61–1.83), ac = 2.48 (2.42–2.87), M = 0.43 (0.45–0.49), C3F = 0.37 (0.34–0.42).

Holotype. ♂ (#06472), 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.GoogleMaps 

Paratypes. CHINA: 4♀ (#06473, #06475−77), same data as holotypeGoogleMaps  .

Distribution. China (Sichuan).

Etymology. Referring to the black, thick spines on ventral portion of cercus.

Remarks. The paratype female specimens were identified as conspecific with the holotype male specimen #06472 by morphological similarity, though the body color pattern of #06472 rather indistinct than females. Considering the insufficiency of evidence of species-level divergence between the holotype and paratype specimens, we tentatively describe them as of the same species.