Hirtodrosophila lambda 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: 120-121

publication ID

https://doi.org/10.11646/zootaxa.4623.1.7

publication LSID

lsid:zoobank.org:pub:E1160BF1-423B-4BD0-B778-D96810ACCB94

persistent identifier

http://treatment.plazi.org/id/E30A87F6-9B09-FF93-9FB1-F8E9FC87961A

treatment provided by

Plazi

scientific name

Hirtodrosophila lambda Chen, Katoh & Gao
status

sp. nov.

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

( Figs 2View FIGURE 2 E–H, 4G–L, 7)

Diagnosis. Cercus caudoventrally narrow and elongated anteriad in ventral view, with ca. three black, stout, peglike spines, lacking a patch of short, thick spines ( Fig. 7DView FIGURE 7). Fork of aedeagus with branches pointed apically and broadened basally, and finely serrate on apex to lateral margin ( Fig. 7View FIGURE 7 I–K, M).

Description (characters commonly seen in H. minshanensis  sp. nov. not repeated) (♂). Head ( Figs 2E, FView FIGURE 2, 4View FIGURE 4 G– L) nearly entirely blackish brown, except for red eyes. Frontal vitta and fronto-orbital plate posteriorly paler. Ocellar triangle brown along margin of triangle made by ocelli. Arista with 4–5 dorsal branches. Supracervical setae 12–13 per side; postocular setae ca. 37 per side. Cibarium with 6–7medial and ca. 19 posterior sensilla per side. Prementum with five (one proximal, two lateral, and two distal) pairs of setae. Labellum with seven pseudotracheae per side.

Thorax ( Fig. 2E, FView FIGURE 2): Postpronotal lobe dark brown, ventrally paler, with ca. three prominent setae, middle one longer.

Legs ( Fig. 2EView FIGURE 2) yellowish brown to dark grayish brown; foreleg darker in color than others. First tarsomeres of all legs shorter than total length of four succeeding tarsomeres.

Male terminalia ( Fig. 7View FIGURE 7): Epandrium with ca. 25 long setae per side. Cercus ventrally concaved in posterior view, with ca. 44 setae including ventral thick ones. Surstylus with upper and lower, straight rows of ca. eight prensisetae in each; inner surface with ca. 27 setae, dorsal ones longer and trichoid-like, ventral ones shorter and thicker. Tenth sternite anteriorly broadened, anteromedially notched. Paramere with ca. three sensilla slightly shorter than paramedian setae.

Measurements (in mm): BL = 2.43 in holotype (in 1♂ paratype: 2.45), ThL = 1.25 (1.20), WL = 3.24 (3.22), WW = 1.38 (1.30).

Indices: FW/HW = 0.53 (in 1♂ paratype: 0.51), ch/o = 0.26 (0.32), prorb = 0.81 (0.70), rcorb = 0.44 (0.35), vb = 0.35 (0.50), orbito = 0.67 (0.82), dcl = 0.54 (0.54), sctl = 1.11 (1.03), sterno = 0.68 (0.69), dcp = 0.53 (0.59), sctlp = 1.44 (1.33), C = 3.04 (3.19), 4c = 0.67 (0.64), 4v = 1.35 (1.32), 5x = 1.55 (1.36), ac = 2.55 (2.84), M = 0.41 (0.36), C3F = 0.48 (0.50).

Holotype. ♂ (#06453), CHINA: Huanglong scenic area, Huanglong Nature Reserve, Ngawa , Sichuan, 32°45'07" N, 103°49'18" E, 3,200 m, 13−14.xi.2018, by net sweeping, J.J. Gao.GoogleMaps 

Paratype. CHINA: 1♂ (#06455), same data as holotypeGoogleMaps  .

Distribution. China (Sichuan).

Etymology. Referring to the bifurcated, lambda-shaped tenth sternite.

Remarks. This species resembles H. seticlasper Katoh & Gao, 2018  , H. spinicerca Katoh & Gao  , and foregoing new species H. minshanensis  , but can clearly be distinguished from them by cercus narrowly elongated with three distinctly long spines, and lacking a patch of short spines.