Lordiphosa tibetica Katoh & Gao, 2018

Katoh, Takehiro K., Zhang, Guang, Toda, Masanori J., Zhang, Wen-Xia & Gao, Jian-Jun, 2018, The Lordiphosa denticeps species group (Diptera: Drosophilidae) in China, with redescriptions of four known species and descriptions of nine new species, Zootaxa 4471 (1), pp. 37-75 : 59-61

Lordiphosa tibetica Katoh & Gao , sp. nov.

(Pls 2A, 3I, 4I, 6A, 7I; Fig. 11 )

Diagnosis. Cercus ventrally tapered, with a fringe of ca. 9 spines on apicoventral margin ( Fig. 11C,F ). Paramere long, distally slender and slightly sinuated, apically obliquely truncated and with minute serration, proximally Ushaped, basally broad ( Fig. 11K,L ).

Description (characters commonly seen in L. yangi sp. nov. not repeated) (♂, ♀). Head (Pls 2A, 3I, 4I, 6A, 7I): Frontal vitta yellowish brown. Fronto-orbital plate darker at bases of orbital setae. Ocellar triangle dark brown, marginally paler. Antennal pedicel brown; arista with 4 dorsal and 1 ventral branches. Supracervical setulae ca. 11 per side; postocular setae 17–20 per side. Cibarium with 20–22 medial and 14–16 posterior sensilla per side. Prementum with 5 (1 proximal, 1 central, 2 lateral, and 1 distal) pairs of setae.

Thorax (Pl. 2A): Postpronotal lobe yellowish brown. Scutellum brown to dark brown, laterally paler. Thoracic pleura yellowish brown.

Legs (Pl. 2A, Fig. 11A,B ): Male foreleg with 4–6, 4, and 2 transverse sex-combs on 1st, 2nd, and 3rd tarsomeres, respectively; each row consisting of 2–4 teeth. Midleg 1 st tarsomere slightly longer than or as long as total length of 4 succeeding tarsomeres.

Abdomen (Pl. 2A): Tergites sometimes with dark brown, medially anteriad extended, caudal bands ca. 1/2 as wide as tergite.

Male terminalia ( Fig. 11C–L ): Epandrium with ca. 25 setae per side. Cercus with ca. 17 long setae. Surstylus with a row of ca. 9 prensisetae on caudodorsal margin and ca. 35 recurved setae on ventral portion of inner surface. Parameres nearly parallel with each other. Hypandrial caudolateral plates large, heavily pubescent.

Female terminalia ( Fig. 11M–O ): Tergite VIII caudodorsally with ca. 4 setae. Oviscapt valve apically somewhat rounded in lateral view, with ca. 16 marginal and ca. 44 minute, lateral ovisensilla. Spermathecal capsule slightly broader than long.

Measurements (in mm): BL = 2.50 in holotype (range in 4♂ / 4♀ paratypes: 2.40̄2.50/2.00̄2.53), ThL = 1.22 (1.18̄1.36/1.24̄1.28), WL = 3.32 (3.10̄3.56/3.32̄3.48), WW = 1.36 (1.27̄1.44/1.34̄1.40).

Indices: FW/HW = 0.49 (range in 4♂ and 4♀, or less if noted, paratypes: 0.46̄0.55), ch/o = 0.20 (0.19̄0.25), prorb = 0.71 (2♂, 2♀: 0.67̄0.79), rcorb = 0.29 (2♂, 3♀: 0.22̄0.33), vb = 0.46 (0.35̄0.53), orbito = 0.55 (0.31̄0.70), dcl = 0.68 (0.46̄0.71), sctl = 1.11 (1.07̄1.23), sterno = 0.54 (0.37̄0.52), dcp = 0.56 (0.48̄0.59), sctlp = 1.10 (1.05̄1.20), C = 3.33 (3.11̄3.76), 4c = 0.69 (0.58̄0.72), 4v = 1.69 (1.51̄1.79), 5x = 1.58 (1.44̄1.74), ac = 2.35 (2.24̄2.76), M = 0.49 (0.44̄0.53), C3F = 0.57 (0.45̄0.57).

Holotype. ♂ (06043), Mt. Duoxiongla , Linzhi, Xizang, China, 3,500–3,800 m a.s.l., 24.ix.2010, J.J. Gao ( KIZ).

Paratypes. CHINA: 4♂, 4♀ (#06024, #06026, #06028–32, #06038), same data as holotype ( KIZ).

Distribution. China (Xizang).

Etymology. Pertaining to the type locality, Tibet (Xizang).

Remarks. This species resembles L. yangi sp. nov. and L. curva , but can be distinguished from L. yangi by the apically not bifurcated paramere (bifurcated into unequal branches in L. yangi ) and from L. curva by the paramere sinuated distally and lacking a subapical spinule and the apically not indented spermathecal capsule (in curva : paramere distally gently curved ventrad and outward, subapically with spinule; spermathecal capsule apically indented).

Figures

FIGURE 11. Lordiphosa tibetica sp. nov. (A, B: paratype #06024; C−L: holotype #06043; M−O: paratype #06038). A, B, sex-combs on right foreleg (lateral and ventrolateral view, respectively); C, D, periphallic organs (caudal and caudolateral view, respectively); E, epandrial ventral lobe (lateral view); F, surstyli and ventral spines of cercus (caudal view); G, inner surface of surstylus (caudolateral view); H, 10th sternite (ventral view); I̅K, phallic organs (ventral, ventrolateral, and lateral view, respectively); L, apical shape of paramere (lateral view); M, N, oviscapt (ventral and lateral view, respectively); O, spermatheca.