Difference between revisions of "Colocasiomyia hailini"

Latest revision as of 13:05, 30 April 2014

Taxonavigation

Ordo: Diptera
Familia: Drosophilidae
Genus: Colocasiomyia

Name

Colocasiomyia hailini Li & Gao sp. n. – Wikispecies link – ZooBank link – Pensoft Profile

Type material

Holotype ♂ (No. 001641): CHINA: Baihualing, Longyang, Baoshan, Yunnan, 1500 m (25°17.27'N, 98°48.7'E), ex Rhaphidophora decursiva inflorescence at Stage III, 29.vi.2006, JT Yin (KIZ).
Paratypes: same data as holotype (11♂, 27♀: Nos 001634–40, 42–49, 51–73); same but (25°17.19'N, 98°47.65'E) (2♂, 2♀: Nos 001674, 75, 1135, 1136), 19.vi.2011, JJ Gao; same but (25°17.19'N, 98°47.65'E) (4♂: Nos 000355–58), 12–15.vii.2011, JJ Gao; same but (25°17.19'N, 98°47.65'E) (2♂, 2♀: Nos 001298–301), from laboratory rearing of eggs in infructescences of Rhaphidophora decursiva collected on 3–9.viii.2012, JJ Gao, Z Fu, NN Li, JM Chen and SS Li; Yixiang, Simao, Pu’er, Yunnan (22°41.19'N, 101°7.77'E) (2♂, 1♀: Nos 001448, 50, 1517), from laboratory rearing of eggs in infructescences of Rhaphidophora decursiva collected on 12–13.xii.2012, JJ Gao and Z Fu (KIZ, SEHU).

Description

Adult male. Head: Supracervical setae approximately 7 per side. Dorsomedial arm of tentorial apodeme 1/3 as long as dorsolateral arm. Eye red, somewhat roundish, with very sparse interfacetal setulae. Frontal vitta mat black. First flagellomere concave on inner margin. Facial carina trapeziform, medially wider than twice width of first flagellomere, as long as pedicel and first flagellomere combined. Palpus convex on ventrodistal portion. Cibarial posterior sensilla minute, 1 per side (Fig. 37). Labellum with 11 pseudotracheae per side.
Thorax: Scutum and scutellum glossy, blackish brown to black; thoracic pleura glossy, blackish brown. Acrostichal setulae in 4 rows.
Wing: Veins yellow. Halter grayish brown except for grayish yellow stalk.
Legs: Foreleg second tarsomere with 6 pegs (Figs 7, 14). Foreleg coxa large, with approximately 15 long setae on underside near attachment to trochanter. Small preapical dorsal setae present only on tibiae of hindlegs.
Abdomen: Tergites glossy, entirely dark brown; II to VI+VII each bearing setulae and setae in approximately 3 transverse rows; setae of posteriormost row largest. Sternites pale brown to brown; VI posteriorly not bilobed.
Terminalia (Figs 38–42): Epandrium pubescent dorsomedially only, with 6 setae per side near posterior margin, 15–16 setae per side on ventral portion and 23–24 setae as thick as upper cercal ones along ventral margin of ventral lobe; apodeme well developed into distally tapering, triangular extension strongly projected anteriad, twice as long as epandrial width, broadly sclerotized along dorsal and ventral margins (Fig. 38); anteroventral portion of epandrium curved inward, apically articulated to lateral arm of hypandrium. Surstylus broad, basally narrowly fused to basal corner of epandrial ventral lobe, dorsally broadly sclerotized, with 1 short, trichoid seta on upper medial portion of outer surface and 3 large, peg-like prensisetae on distal margin; lowest prensiseta nearly as long as width of surstylus, curved inwards and slightly downwards, especially in distal 1/3, narrowly edged by caudoventral portion of surstylus only along its basal portion (Figs 38, 39). Cercus semilunar, narrower than 1/2 its (dorsoventral) height, pubescent on dorsal 2/3, with approximately 48 setae (including prominent one twice as long as others) all over and approximately 45 setulae on caudoventral, inner margin; ventral slightly incurved lobe 1/3–1/4 of cercal height (Fig. 38). Membrane between epandrium and cercus pubescent dorsally to laterally. Median piece of 10th sternite cordiform in posterior view, moderately sclerotized; lateral piece somewhat cuneiform, narrowing anteriad, connected to inner, basal corner of epandrial ventral lobe with membranous tissue. Hypandrium long, narrow, plate-like, anteriorly widened (Fig. 42). Parameres somewhat semilunar in ventral view, basally fused to each other, apically with 5 or 6 minute sensilla in small medioapical patch (Figs 40, 42). Aedeagus nearly entirely separated into a pair of lateral lobes, nearly straight, apically trilobed; lobes curved ventrad and connected with each other by tendon-like membranous structures (Figs 40, 41); apodeme rod-like, arched in lateral view, longer than aedeagus (Fig. 40).
Measurements (holotype / range in 10♂ paratypes, in mm): BL = 2.01 / 1.85−2.14, ThL = 0.86 / 0.76−0.94, WL = 1.79 / 1.59−1.89, WW = 0.79 / 0.72−0.85.
Indices (holotype / range in 10♂ paratypes): FW/HW = 0.54 / 0.53−0.56, ch/o = 0.48 / 0.46−0.55, prorb = broken / 1.08 (1♂), rcorb = 0.61 / 0.56−0.59 (6♂), orbito = 0.86 / 0.63−0.85, vb = 0.31 / 0.30−0.36, dcl = 0.52 / 0.54−0.62 (6♂), presctl = 0.38 / 0.30−0.39 (9♂), sctl = 0.75 / 0.59−0.77 (9♂), sterno = 0.75 / 0.72−0.94, mid katepisternal seta indistinguishable from other fine setae, dcp = 0.92 / 0.82−1.02, sctlp = 1.00 / 0.92−1.12, C = 1.90 / 1.72−2.12, 4c = 1.18 / 0.89−1.21, 4v = 1.79 / 1.28−1.75, 5x = 1.15 / 0.94−1.17, ac = 3.56 /3.04−3.59, M = 0.19 / 0.19−0.21, C3F = 0.48 / 0.35−0.53.
Female. Head, thorax, wing and legs as in male.
Terminalia: Tergite VII mid-dorsally not constricted; VIII pubescent nearly entirely, with 4–5 setae in a longitudinal row on unpubescent, discolored, posteroventral portion. Oviscapt distal elongation constricted dorsally at basal 1/3, apically somewhat truncate, with 6, 9 and 3 trichoid ovisensilla per side on distal 1/3 of dorsal margin, entire ventral margin, and at apex, respectively (Fig. 43).
Measurements (range in 10♀ paratypes, in mm): BL = 2.43−2.95, ThL = 0.89−1.22, WL = 1.90−2.48, WW = 0.85−1.07.
Indices (range in 10♀ paratypes): FW/HW = 0.55−0.59, ch/o = 0.50−0.62, prorb broken, rcorb = 0.40−0.52 (3♀), orbito = 0.68−0.91, vb = 0.29−0.35, dcl = 0.43−0.57 (6♀), presctl = 0.29−0.37 (7♀), sctl = 0.69−0.77 (9♀), sterno = 0.74−0.91, dcp = 0.90−1.09, sctlp = 1.00−1.12, C = 1.83−2.23, 4c = 1.00−1.14, 4v = 1.50−1.86, 5x = 0.87−1.19, ac = 3.28−4.00, M = 0.16−0.20, C3F = 0.38−0.59.

Distribution

China (Yunnan).

Etymology

The specific name “hailini” is a patronym in honor of the emeritus Professor Hai-lin Wang of the Southwest Forestry University, China.

Remarks

This species resembles the following species, Colocasiomyia yini sp. n., in overall outer morphology, but can be distinguished from the latter by 1) C3F < 2/3 (C3F ≥ 2/3 in yini sp. n.); 2) lowest, peg-like prensiseta on distal margin of surstylus curved inwards and slightly downwards, especially in distal 1/3, narrowly edged by caudoventral portion of surstylus only along its basal portion (Fig. 39) [in Colocasiomyia yini sp. n., lowest peg-like prensiseta strongly curved downwards in distal half, narrowly edged by caudoventral portion of surstylus along its whole length (Figs 46)]; 3) ventral slightly incurved lobe of cercus 1/3–1/4 of cercal height (Fig. 38) [in Colocasiomyia yini, ventral lobe of cercus approximately 1/2 of cercal height (Fig. 45)]; 4) distal, narrow part of oviscapt constricted dorsally at basal 1/3 (Fig. 43) [in Colocasiomyia yini sp. n., distal, narrow part of oviscapt almost even-edged (Fig. 50)].

Original Description

• Li, N; Toda, M; Fu, Z; Chen, J; Li, S; Gao, J; 2014: Taxonomy of the Colocasiomyia gigantea species group (Diptera, Drosophilidae), with descriptions of four new species from Yunnan, China ZooKeys, 406: 41-64. doi

Images

Figures 2–22. SEM photographs showing leg and oviscapt fine structures in the Colocasiomyia gigantea species group. Foreleg tarsomeres I and II (2–8), pegs on foreleg tarsomere II (9–15) and warts on basal part of lateral lobe or basal membrane of oviscapt (16–22) of Colocasiomyia gigantea (2, 9, 16), Colocasiomyia scindapsae (3, 10, 17), Colocasiomyia rhaphidophorae (4, 11, 18), Colocasiomyia longifilamentata sp. n. (5, 12, 19), Colocasiomyia longivalva sp. n. (6, 13, 20), Colocasiomyia hailini sp. n. (7, 14, 21) and Colocasiomyia yini sp. n. (8, 15, 22). Scale line = 0.1 mm in 2–8, 0.05 mm in 9–15. Figures 16–22 are in the same magnification, with the width corresponding to 30 µm.  Figures 37–50. Colocasiomyia hailini Li & Gao, sp. n. (37–43) and Colocasiomyia yini Li & Gao, sp. n. (44–50). Adult males and females (paratypes) from Baihualing, Yunnan, China: 37, 44 Cibarium and clypeus (dorsal view) 38, 45 periphallic organs (posterolateral view) 39, 46 surstylus 40, 47 phallic organs (lateral view) 41, 48 apical part of aedeagus (ventral view) 42, 49 hypandrium and parameres (ventral view) 43, 50 oviscapt (lateral view). Scale lines = 0.1 mm.