Lordiphosa medogensis 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 : 61-63

Lordiphosa medogensis Katoh & Gao , sp. nov.

(Pls 2B, 3J, 4J, 6B, 7J; Fig. 12 )

Diagnosis. Sex-comb absent ( Fig. 12A,B ). Cercus ventrally neither tapered nor truncated, with a tuft of ca. 8 small setae but no stout spines around ventral apex ( Fig. 12C,D,F ). Paramere apically horizontally flattened and slightly pointed ( Fig. 12K,L ), subbasally with 2 sensilla ( Fig. 12M ). Gonopods dorsomedially with large, roundish expansion in lateral view ( Fig. 12K ). Aedeagus completely fused to gonopods, ventrally nearly entirely pubescent ( Fig. 12I –K ). Oviscapt valve apically triangular in lateral view and narrowing in ventral view, with ca. 8 marginal and 2 lateral, large, peg-like ovisensilla on apical margin and subapical surface, respectively, in addition to ca. 35 minute, lateral ovisensilla ( Fig. 12N,O ).

Description (characters commonly seen in L. yangi sp. nov. not repeated) (♂, ♀). Head (Pls 2B, 3J, 4J, 6B, 7J): Frontal vitta yellowish brown. Fronto-orbital plate yellowish brown, paler surrounding orbital setae. Ocellar triangle brown. Face and facial carina brown; carina undeveloped. Occiput brown, ventrally dark brown. Postgena brown. Arista with 4 dorsal and 1 ventral, long branches and large terminal bifurcation. Supracervical setulae 14¯17 per side; postocular setae 18–19 per side. Clypeus yellowish brown, dorsally somewhat grayish. Cibarium with ca. 12 medial and ca. 11 posterior sensilla per side; 1 pair of medial sensilla situated outside rows, just anterior to sensilla campaniformia (Pl. 6B). Prementum with 5–6 (1 proximal, 2 lateral, and 2–3 distal) pairs of setae. Labellum with 6 pseudotracheae per side.

Thorax (Pl. 2B) entirely yellowish brown; mesonotum without stripe; thoracic pleura paler than mesonotum.

Legs (Pl. 2B, Fig. 12A,B ): Foreleg 1 st tarsomere as long as or slightly shorter than total length of 4 succeeding tarsomeres. Midleg 1 st tarsomere as long as total length of 4 succeeding tarsomeres.

Abdomen (Pl. 2B): Tergites yellowish brown, lacking caudal bands.

Male terminalia ( Fig. 12C–M ): Epandrium entirely pubescent, with ca. 6 and ca. 18 long setae per side on dorsal and ventral portions, respectively. Cercus dorsally to subventrally with ca. 17 long setae. Surstylus with ca. 47 setae scattered on caudal margin and inner surface but no distinct row of prensisetae; setae on inner surface long. Parameres distally strongly divergent from each other. Hypandrial caudolateral plates unpubescent. Aedeagal apodeme longer than aedeagus.

Female terminalia ( Fig. 12N–P ): Tergite VIII yellowish brown, caudodorsally not swollen and without setae. Epiproct and hypoproct yellowish brown. Sclerotized structure inside oviscapt short, broad, not rod-shaped in lateral view. Spermathecal capsule slightly broader than long; introvert about 2/3 height of capsule, horizontally wrinkled.

Measurements (in mm): BL = 3.00 in holotype (in 1♀ paratype: 3.16), ThL = 1.60 (1.54), WL = 3.27 (3.23), WW = 1.26 (1.28).

Indices: FW/HW = 0.49 (in 1♀ paratype: 0.51), ch/o = 0.15 (0.11), prorb = 0.88 (0.77), rcorb = 0.26 (0.23), vb = 0.40 (0.37), orbito = 0.60 (0.40), dcl = 0.53 (0.73), sctl = 1.21 (1.17), sterno = 0.53 (0.63), dcp = 0.59 (0.49), sctlp = 1.27 (1.36), C = 4.00 (3.44), 4c = 0.54 (0.68), 4v = 1.35 (1.51), 5x = 1.27 (1.30), ac = 1.73 (2.08), M = 0.34 (0.41), C3F = 0.57 (0.56).

Holotype. ♂ (#06006), near the 108K station, Motuo (Medog) Country, Xizang, China, 4,5. x.2010, ex Impatiens sp. (with yellow flowers), J.J. Gao ( KIZ).

Paratype. 1♀ (#06007), same data as holotype ( KIZ).

Ecological notes. The two specimens were found visiting yellow Impatiens flowers and collected directly from the flowers using an aspirator.

Distribution. China (Xizang).

Etymology. Pertaining to the type locality.

Remarks. This species certainly belongs to the L. denticeps group based on the overall morphology and genital structures, but is unique among the members in lacking ventral, stout spines on the cercus, which is one of the diagnostic characters of this species group.

Figures

FIGURE 12. Lordiphosa medogensis sp. nov. (A−M: holotype #06006; N−P: paratype #06007). A, B, 1st and 2nd tarsomeres of 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 portion 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, distal shape of parameres (caudodorsal view); M, sensilla on parameres (ventral view); N, O, oviscapt (ventral and lateral view, respectively); P, spermatheca.