Colocasiomyia xenalocasiae ( Okada, 1980 )

Takano, Kohei Takenaka, Gao, Jian-Jun, Hu, Yao-Guang, Li, Nan-Nan, Yafuso, Masako, Suwito, Awit, Repin, Rimi, Pungga, Runi Anak Sylvester, Meleng, Paulus Ak, Kaliang, Clement Het, Chong, Lucy & Toda, Masanori J., 2021, Phylogeny, taxonomy and flower-breeding ecology of the Colocasiomyia cristata species group (Diptera: Drosophilidae), with descriptions of ten new species, Zootaxa 5079 (1), pp. 1-70 : 40-42

12) Colocasiomyia xenalocasiae ( Okada, 1980)

( Figs 4A , 6A , 9O , 10F–H , 11D,E , 15K , 26 )

Drosophilella xenalocasiae Okada, 1980: 218 .

Colocasiomyia xenalocasiae: Okada, 1988: 36 .

Drosophilella colocasiae: Okada, 1975: 356 (nec Duda, 1924).

Diagnosis. A pair of processes on male abdominal sternite VI convergent ( Fig. 9O ).

Supplementary description. Supracervical setae 5–10 per side. Eye with stout, dense interfacetal setulae. Cibarial, medial sensilla approximately 3 per side; posterior sensillum 0–1 per side ( Fig. 4A ). Supralateral seta outside prementum 0–1 per side ( Fig. 26A ). Prescutellar acrostichal setae present; acrostichal setulae in 4 rows. Apical scutellar setae nearly equidistant from each other and from basal scutellar seta. Costal setae in middle row all apically blunt, heavy, peg-like ( Fig. 6A ). Mid tibia with approximately 3 apical, stout setae. Male abdominal sternites III and IV longer than wide, posteriorly slightly narrowing ( Fig. 26B ). Female abdominal sternites VI as wide as long, posteriorly dilated, medially notched on posterior margin ( Fig. 26C ). Epandrium pubescent except for anterior margin and anteroventral elongation, posteroventrally prominently extended, with approximately 1 seta on lateral portion and 11–12 setae on posteroventral portion of each side ( Fig. 10F ). Surstylus long, narrow plate with 3 recurved teeth apically and 1 minute seta subapically ( Fig. 10H ). Median piece of subepandrial sclerite medially and anteriorly bilobed into long lobes; lateral pieces long, narrow ( Fig. 10G ). Cercus pubescent except for anterior margin and ventral 1/3, with approximately 30 setae ( Fig. 10F ). Oviscapt about 8 times as long as wide, with 16–17 ovisensilla ( Fig. 26D ).

Specimens examined. Japan: 10♂, 10♀, Sembaru, Okinawa, Ryukyu , 29.iv.2007, ex Alocasia odora, M.J. Toda leg. ( SEHU) . China: 9♂, 11♀, Menglun, Xishuangbanna , Yunnan, 940 m a.s.l., 5.xii.2018, ex Colocasia esculenta, S. Ling leg .; 16♂, 24♀, ditto except for 5.xi.2018, ex Leucocasia gigantea (SEHU) . Philippines: 3♂, 5♀, B. Santiago, Iriga, Luzon , 29.xi.2012, ex C. esculenta, P.J. Matthews, M. Medecilo & J.R. Castillo leg. ( MPMP, SEHU) .

Distribution. Ryukyu Is., Philippines * (Luzon), China ( Taiwan, Guangdong, Guangxi, Yunnan), Vietnam. *

New record.

Figures

FIGURE 4. Characters 5 and 6 on the cibarium (dorsal view) of Colocasiomyia xenalocasiae (Okada) (A), C. cristata de Meijere (B) and C. sarawakana sp. nov. (C). Abbreviations: a s, anterior sensilla; m s, medial sensilla; p s, posterior sensillum; s c, sensilla campaniformia. Scale bars: 0.1 mm.

FIGURE 6. Character 12 of costal setae on the wing (anterodistal portion) of Colocasiomyia xenalocasiae (Okada) (A), C. colocasiae (Duda) (B) and C. cristata de Meijere (C). Scale bars: 0.1 mm.

FIGURE 9. Male abdominal sternite VIs of Colocasiomyia colocasiae (Duda) (B in anteroventral view, C in lateral view), C. stamenicola (Carson & Okada) (D in anterior view) and all species of the C. cristata subgroup (A in ventral view, E‒R in anterior view): A, C. ecornuta sp. nov.; E, C. grandis sp. nov.; F, C. vieti sp. nov.; G, C. cristata de Meijere; H, C. matthewsi sp. nov.; I, C. sulawesiana Okada & Yafuso; J, C. kinabaluana sp. nov.; K, C. kotana sp. nov.; L, C. sabahana sp. nov.; M, C. sarawakana sp. nov.; N, C. pistilicola (Carson & Okada); O, C. xenalocasiae (Okada); P, C. diconica (Toda & Okada); Q, C. sumatrana sp. nov.; and R, C. leucocasiae sp. nov. Scale bars: 0.1 mm.

FIGURE 10. Characters 30‒39 on the periphallic organs of Colocasiomyia colocasiae (Duda) (A, lateral view; B, anterior view), C. cristata de Meijere (C, lateral view; D, ventral view; E, surstylus) and C. xenalocasiae (Okada) (F, oblique lateral view; G, ventral view; H, surstylus). Abbreviations: cerc, cercus; epand, epandrium; sur, surstylus. Scale bars: 0.1 mm.

FIGURE 11. Characters 40‒47 on the phallic organs of Colocasiomyia colocasiae (Duda) (A, lateral view; B, ventral view; C, hypandrium and gonocoxites, oblique lateral view), C. xenalocasiae (Okada) (D, lateral view; E, ventral view), C. sabahana sp. nov. (F, lateral view; G, ventral view) and C. cristata de Meijere (H, lateral view; I, ventral view).Abbreviations: aed, aedeagus; goncx, gonocoxite; hypd, hypandrium; phap, phallapodeme; ph sh, phallal sheath. Scale bars: 0.1 mm.

FIGURE 15. Habitus (upper, lateral view; lower, dorsal view) of species of the Colocasiomyia cristata subgroup.A, C. ecornuta sp. nov. ♂; B, C. grandis sp. nov. ♂; C, C. vieti sp. nov. ♂; D, C. cristata de Meijere ♂; E, C. sulawesiana Okada & Yafuso ♂; F, C. kinabaluana sp. nov. ♂; G, C. kotana sp. nov. ♂; and H, C. matthewsi sp. nov. ♂. Scale bars: 1 mm.

FIGURE 26. Colocasiomyia xenalocasiae (Okada) (♂ and ♀ from Menglun, Xishuangbanna,Yunnan, China).A, Dorsal portion of proboscis (caudal view); B, male abdominal sternites (ventral view); C, female abdominal sternites (ventral view); D, female terminalia (lateral view). Scale bars: 0.1 mm.