Colocasiomyia cristata, de Meijere, 1914

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 : 21-22

2. Colocasiomyia cristata species subgroup, new

Diagnosis. Phallapodeme shorter than 1/2 of phallal sheath (ch.47-1; Fig. 11D,F,H ). Distal portion of oviscapt not distinctly differentiated from basal portion (ch.50-1; Fig. 12C ).

Shared characters. All coxae and femora dark brown to black at least partly, except for Colocasiomia sumatrana sp. nov.; all tibiae distally dark brown to black; all tarsi brownish yellow, with darker tarsomere V ( Fig. 15 ). Fore tarsomere II with 4 pegs (ch.14-2; Fig. 7B ). Male abdominal sternite V wider than long (ch.18-0; Fig. 8A ). Epandrium without seta as long as width of epandrium on posteroventral margin (ch.31-1; Fig. 10C,F ). Cercus narrower than 1/2 cercal length; ventral/apical portion more or less differentiated from upper portion (ch.38,39-0; Fig. 10C,F ). Phallal sheath apically not bilobed (ch.42-0; Fig. 11D,F,H ).

Included taxa. Colocasiomyia ecornuta sp. nov., C. grandis sp. nov., C. vieti sp. nov., C. cristata species complex, C. sabahana species complex and C. xenalocasiae species complex.

Key. The digital, multiple-entry key “ Colocasiomyia cristata species subgroup” to all species of this subgroup has been constructed largely based on the character matrix of Appendix 6, and is available from the following website: https://evolgen.biol.se.tmu.ac.jp/Classification/index.jsp (Biological Classification and Identification System).

2.1. Species not assigned to any species complex

Figures

FIGURE 7. Characters 13‒15 on the fore (A, B, distal portion of tibia and tarsus) and mid (C, D, ditto) legs of Colocasiomyia colocasiae (Duda) (A, C) and C. cristata de Meijere (B, D). Scale bars: 0.1 mm.

FIGURE 8. Characters 16‒22 on the male (A, C) and female (B, D) abdominal sternites (s) of Colocasiomyia gigantea (Okada) (A, B) and C. colocasiae (Duda) (C, D). 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 12. Characters 48‒51 on the female terminalia of Colocasiomyia colocasiae (Duda) (A, lateral view; B, hypoproct in ventral view) and C. cristata de Meijere (C, lateral view; D, hypoproct in ventral view). Abbreviations: epiprct, epiproct; hyprct, hypoproct; ov, oviscapt; t-VIII, tergite VIII. 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.