Colocasiomyia zeylanica

Colocasiomyia zeylanica species group Colocasiomyia zeylanica species group: Sultana et al., 2006: 694; Fartyal et al., 2013: 769. Diagnosis (modified from Fartyal et al. 2013). Pedicel with uniformly short, stout setae only, lacking prominently long one(s) (ch.2-1; Fig. 3, “ Fig. 6 ” in Grimaldi 1991). Two peg-like setae present only on fore tarsomere II (ch.36- 0, ch.38-0; Fig. 9A–E 1, “ Fig. 1C ” in Okada 1986, “ Fig. 9 ” in Grimaldi 1991). Hypandrium forming like tube surrounding phallus (ch.66-2; Fig. 11). Gonocoxites absent (ch.69-4; Fig. 11). Shared characters. Distance between antennal scapes wider than half of scape diameter (ch.1-1; Fig. 2A–E 2, “ Fig. 1A ” in Okada 1986, “ Fig. 6 ” in Grimaldi 1991). Antennal, first flagellomere grayish yellow, with small invaginated organ but no hollow organ (ch.3-0; Fig. 3, “ Fig. 6 ” in Grimaldi 1991); arista entirely densely pubescent, without branches (ch.5-1; Fig. 3, “ Fig. 1A, B ” in Okada 1986, “ Fig. 6 ” in Grimaldi 1991). Eye dark red (Fig. 14). Frons blackish brown; frontal vittae mat. Supracervical setae distally more or less curved, longer than inner, occipital setae (ch.11-0, ch.12-0; Fig. 4). Palpus pale grayish yellow, flat or convex in ventrodistal portion (ch.16-0; Fig. 5, “ Fig. 1B ” in Okada 1986, “ Fig. 7 ” in Grimaldi 1991). All cibarial sensilla very small or minute; anterior sensilla irregularly arranged in square or triangle (ch.18-1, ch.19-1; Fig. 5A–E 2, “ Fig. 7 ” in Grimaldi 1991). Proboscis without a pair of lateral, spherical bumps covered with numerous, short, stout setae (ch.22-0; Fig. 5, “ Fig. 7 ” in Grimaldi 1991). Additional, presutural, dorsocentral setae absent (Fig. 6, “ Fig. 1A ” in Okada 1986). Basal and apical, scutellar setae nearly parallel (Fig. 6). Halter grayish brown. Wing hyaline; veins yellow (Fig. 8). Fore tarsomere II slightly elongated below (ch.34-1; Fig. 9A–E 1, “ Fig. 1C ” in Okada 1986, “ Fig. 9 ” in Grimaldi 1991). Preapical setae absent on all tibiae (ch.41-1; Fig. 9, “ Fig. 1A ” in Okada 1986). Dorsomedian, terminal, down-curved seta on tarsomere Vs not longer than claw (ch.42-0; Fig. 9). Mid tibia apicoventrally with 2 (1 long and 1 small) stout setae (ch.39-0; Fig. 9A–E 2). Spiracles simple, small (ch.44-0). Male sternite VI pubescent entirely, without process (ch.48-0, ch.50-0; Fig. 10A–E 1). Epandrium anteroventrally much elongated, not fused to cercus, without peg-like, stout seta at posteroventral apex; apodeme narrow lobe on anteromedial to -dorsal margin or absent (ch.55- 1, ch.57-0, ch.58-0, ch.62-0; Figs 11-1A–C 1,2, 11-2D, E). Hypandrial setae absent (ch.67-1; Figs 11-1A–C 3,4, 11-2D, E). Postgonites fused to aedeagal sheath, forming together phallal-sheath tube distally more or less separated into a pair of lateral lobes (ch.71-1, ch.72-1, ch.73-0; Figs 11-1A–C 3,4, 11-2D, E). Phallapodeme mostly rod-like (ch.77-0; Figs 11-1A–C 3,4, 11-2D, E; “ Fig.10 ” in Grimaldi 1991). Phallal guide absent (ch.78-0; Figs 11-1A–C 4, 11-2D, E). Epiproct nearly entirely pubescent (ch.79-0; Fig. 12A–E 1). Epigynium pubescent only on dorsal portion (ch.82-0; Fig. 12A–E 1). Hypogynial, anteroventral bridge absent (ch.85-1; Fig. 12A–E 2); valves separated from each other, distally differentiated into more or less narrow process from basal, broad portion, with only trichoid sensilla (ch.86- 0, ch.87-1, ch.88-1; Fig. 12). Included taxa. Colocasiomyia zeylanica species subgroup; and C. oligochaeta subgroup. Key. The digital, multiple-entry key “ Colocasiomyia zeylanica species group” to all species of this group has been constructed partly based on the character matrix of Appendix 2, and is available from the following website: https://evolgen.biol.se.tmu.ac.jp/Classification/index.jsp (Biological Classification and Identification System).
Published as part of Zhang, Guang, Gao, Jian-Jun, Takano, Kohei Takenaka, Yafuso, Masako, Suwito, Awit, Meleng, Paulus Ak & Toda, Masanori J., 2023, Phylogenetic classification and palm-inflorescence anthophily of the Colocasiomyia zeylanica species group (Diptera: Drosophilidae), with descriptions of five new species, pp. 201-238 in Zootaxa 5278 (2) on page 221, DOI: 10.11646/zootaxa.5278.2.1, http://zenodo.org/record/7905995
{"references":["Sultana, F., Hu, Y. G., Toda, M. J., Takenaka, K. & Yafuso, M. (2006) Phylogeny and classification of Colocasiomyia (Diptera, Drosophilidae), and its evolution of pollination mutualism with aroid plants. Systematic Entomology, 31, 684 - 702. https: // doi. org / 10.1111 / j. 1365 - 3113.2006.00344. x","Fartyal, R. S., Gao, J. J., Toda, M. J., Hu, Y. G., Takano, K. T., Suwito, A., Katoh, T., Takigahira, T. & Yin, J. T. (2013) Colocasiomyia (Diptera: Drosophilidae) revised phylogenetically, with a new species group having peculiar lifecycles on monsteroid (Araceae) host plants. Systematic Entomology, 38, 763 - 782. https: // doi. org / 10.1111 / syen. 12027","Grimaldi, D. A. (1991) Systematics of the genus Colocasiomyia de Meijere (Diptera: Drosophilidae): cladistics, a new generic synonym, new record, and a new species from Nepal. Entomologica Scandinavica, 22, 417 - 426. https: // doi. org / 10.1163 / 187631291 X 00219","Okada, T. (1986) Taximetrical analyses of costal chaetotaxy of the genus Drosophilella Duda, with description of a new species from Sri Lanka (Diptera, Drosophilidae). Proceedings of the Japanese Society of Systematic Zoology, 34, 53 - 59."]}