Colocasiomyia diconica ( Toda & Okada, 1983 )

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 : 42-43

13) Colocasiomyia diconica ( Toda & Okada, 1983)

( Figs 5D , 9P , 15L , 27 )

Drosophilella diconica Toda & Okada, 1983: 172 .

Colocasiomyia diconica: Okada, 1988: 36 .

Diagnosis. Acrostichal setulae in 2 rows ( Fig. 5D ). A pair of processes on male abdominal sternite VI shorter than 0.1 mm, proximally parallel, distally divergent ( Fig. 9P ).

Supplementary description (not repeating characters common to C. xenalocasiae ). Supracervical setae 3–5 per side. Eye with fine, sparse interfacetal setulae. Cibarial, medial sensilla 2–3 per side; posterior sensilla 1–2 per side. Supralateral seta outside prementum 1 per side. Prescutellar acrostichal setae absent ( Fig. 5D ). Costal setae in middle row all weak, trichoid. Mid tibia with approximately 2 apical, stout setae. Male abdominal sternite III longer than wide, rectangular; IV as wide as long ( Fig. 27A ). Epandrium pubescent except for anterior margin and anteroventral elongation, posteroventrally less extended, with 13–14 setae on ventral portion of each side ( Fig. 27C ). Surstylus long, distally tapering, apically truncate plate with 3 recurved teeth apically and 1 minute seta subapically ( Fig. 27C ). Cercus pubescent except for anterior margin and ventral 1/4 ( Fig. 27C ). Oviscapt about 4 times as long as wide, with 11–14 ovisensilla ( Fig. 27F ).

Specimens examined. Thailand: 1♂, 2♀, near Chao Phraya River, Taykoa , Bangkok, 14°07’25”N 100°31’18”E, 16.i.2020, ex Colocasia esculenta, P.J. Matthews leg. ( SEHU) . Malaysia: 28♂, 37♀, Ulu Gombak , Selangor, 8.xii.2013, ex C. esculenta, M.J. Toda leg. ( SEHU, UMKL) ; 12♂, 10♀, Sampadi , Sarawak, 9.viii.2012, ex C. esculenta, A.M. Paulus & K.T. Takano leg. ( RDID) .

Distribution. Borneo (Sabah, Sarawak *, West Kalimantan), Sulawesi?, Java, Sumatra, Peninsular Malaysia *, Vietnam, Thailand, Myanmar, Sri Lanka?.

Figures

FIGURE 5. Characters 7‒11 on the thorax (A‒D, dorsal view; E‒G, lateral view) of Colocasiomyia colocasiae (Duda) (A, E), C. grandis sp. nov. (B), C. cristata de Meijere (C, F), C. diconica (Toda & Okada) (D) and C. ecornuta sp. nov. (G). Abbreviations: a dc s, anterior dorsocentral setae; ap sctl s, apical scutellar seta; b sctl s, basal scutellar seta; p kepst s, posterior katepisternal seta; pprn s, postpronotal seta; trn sut, transverse suture. Scale bars: 0.5 mm in A‒D, 0.1 mm in E‒G.

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 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 27. Colocasiomyia diconica (Toda & Okada) (♂ and ♀ from Taykoa, Bangkok, Thailand).A, Male abdominal sternites (ventral view); B, female abdominal sternites (ventral view); C, periphallic organs (lateral view); D, phallic organs (lateral view); E, ditto (ventral view); F, female terminalia (lateral view). Scale bars: 0.1 mm.