Lordiphosa tripartita ( Okada, 1966 )

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 : 50-51

Lordiphosa tripartita ( Okada, 1966)

(Pls 1D, 3¯5D, 7D; Fig. 6 )

Drosophila (Hirtodrosophila) tripartita Okada, 1966: 78 .

Drosophila (Lordiphosa) tripartita: Okada, 1990: 154 .

Lordiphosa tripartita: Zhang, 1993: 145 .

Diagnosis. Cercus ventrally elongated, with a tuft of ca. 6 spines around ventral apex ( Fig. 6C,D,F ). Hypandrial caudolateral lobes unpubescent ( Fig. 6I ̄K). Paramere broad, flat, apically pointed, gently curved ventrad, bowshaped in lateral view ( Fig. 6K,L ). Gonopods rounded around caudoventral corners, dorsomedially roundly concaved in lateral view ( Fig. 6L ).

Description (characters commonly seen in L. denticeps not repeated) (♂). Head (Pls 1D, 3̄5D, 7D): Frontal vitta yellowish brown to brown. Fronto-orbital yellowish brown. Ocellar triangle brown. Occiput brown, dorsally yellowish brown. Postgena yellowish brown, brown near occiput. Antennal 1 st flagellomere pale yellow; arista with 4 dorsal and 2 ventral branches. Supracervical setulae 13¯15 per side; postocular setae 13–16 per side. Clypeus brown. Cibarium with 25–28 medial and ca. 15 posterior sensilla per side. Prementum with 5 (1 proximal, 2 lateral, and 2 distal) pairs of setae.

Thorax (Pl. 1D): Postpronotal lobe anteriorly grayish. Mesonotum medially with 1 brown, longitudinal, caudally broadened stripe. Scutellum brown, laterally paler. Acrostichal setulae in ca. 6 irregular rows. Mid katepisternal seta distinctly longer than those below it.

Legs (Pl. 1D, Fig. 6A,B ): Male foreleg with 1–2, 1–2, and 1 transverse sex-combs on 1st, 2nd, and 3rd tarsomeres, respectively; each transverse row consisting of 2–4 brown, not so thick teeth. Foreleg 1 st tarsomere slightly shorter than total length of 4 succeeding tarsomeres.

Abdomen (Pl. 1D): Tergites pale grayish brown, glossy, caudally without bands.

Male terminalia ( Fig. 6C–L ): Epandrium with ca. 24 long setae per side; ventral lobe apically not rounded. Cercus laterally strongly sclerotized, pubescent except for lateral margin, with ca. 19 long setae. Surstylus with a row of ca. 14 prensisetae on caudodorsal margin and ca. 34 recurved setae on ventral portion of inner surface. Aedeagus basally membranous, submedially to basally sheathed by gonopods; apodeme rod-shaped, not dilated apically, much shorter than aedeagus.

Measurements (in mm): BL = 2.32 (1♂), ThL = 1.00, WL = 2.80, WW = 1.14.

Indices: FW/HW = 0.53, ch/o = 0.14, prorb = 0.82, rcorb = 0.29, vb = 0.50, orbito = 0.50, dcl = 0.57, sctl = 1.40, sterno = 0.48, dcp = 0.57, sctlp = 1.25, C = 3.62, 4c = 0.62, 4v = 1.47, 5x = 1.63, ac = 2.00, M = 0.46, C3F = 0.45.

Specimen examined. CHINA: 1♂ (#06049), Mt. Duoxiongla, Linzhi , Xizang, 3,500–3,800 m a.s.l., 24.ix.2010, J.J. Gao ( KIZ).

Distribution. Nepal, India (Uttarakhand), China * (Xizang).

Figures

FIGURE 6. Lordiphosa tripartita (Okada, 1966) (A−L: #06049). 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 and gonopods (lateral view).