Colocasiomyia zeylanica
Creators: name: Zhang, Guang
name: Gao, Jian-Jun
name: Takano, Kohei Takenaka
name: Yafuso, Masako
name: Suwito, Awit
name: Meleng, Paulus Ak
name: Toda, Masanori J.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Colocasiomyia
Colocasiomyia zeylanica

description: 1. Colocasiomyia zeylanica species subgroup, new
Diagnosis. Male sternites V and VI fused to each other (ch.46-1; Fig. 10A–C 1). Hypandrial phragma vertical plate-like (ch.68-1; Fig. 11-1A–C 3,4).
Shared characters. Antennal arista distally narrowing (ch.4-0; Fig. 3A–C, “ Fig. 1A, B ” in Okada 1986, “ Fig. 6 ” in Grimaldi 1991). Eye with stout, dense, interfacetal setulae (ch.7-1; Fig. 2A–C 1). Proclinate, orbital setae present (ch.8-0; Fig. 2A–C 2, “ Fig. 1A, B ” in Okada 1986, “ Fig. 6 ” in Grimaldi 1991). Inner, vertical setae longest on head, in line with ipsilateral orbitals (Fig. 2A–C 2). Outer, vertical setae present (ch.9-0; Fig. 4A–C, “ Fig. 1A, B ” in Okada 1986, “ Fig. 6 ” in Grimaldi 1991). Facial carina shorter than pedicel + 1st flagellomere (Fig. 2A– C 2). Gena blackish brown. Upper, postocular setae down-curved, except uppermost ones (ch.10-0; Fig. 4A–C). Patch of supracervical setae present between dorsomedial and -lateral, tentorial apodemes (ch.13-0; Fig. 4A–C). Dorsomedial, tentorial apodeme reaching 1/4 to vertex; dorsolateral apodemes divergent, nearly straight or distally slightly curved outward (ch.14-0; Fig. 4A–C). Palpus apically with single, prominent seta (ch.17-1; Fig. 5A–C 1). Clypeus not thicker than 1/2 length of cibarium (Fig. 5A–C 1). Cibarial, medial sensilla in parallel rows as wide as sensilla campaniformia; posterior sensillum 1 per side (ch.20-0, ch.21-2; Fig. 5A–C 2). Thorax glossy, blackish brown (Fig. 14A–C). Postpronotal lobe with 2 prominent setae subequal in length (ch.25-0; Fig. 6A–C). Anterior, dorsocentral setae situated posteriorly to transverse suture (ch.26-0; Fig. 6A–C). A pair of prescutellar, acrostichal setae present (ch.27-0; Fig. 6A–C). Acrostichal setulae in 6 rows (ch.28-1; Fig. 6A–C). Costal setae in middle row from 2nd costal section to proximal portion of 3rd section all apically blunt, heavy, peg-like; sparse setae in upper row small, weak, trichoid (ch.30-0, ch.31-0; Fig. 8A–C 1). Patch covered with only minute pubescence absent on anterodorsal portion of fore tarsomere I (ch.33-0; Fig. 9A–C 1). Hind tibia without apicoventral, stout setae (ch.40-0; Fig. 9A–C 3). Claws shorter than tarsomere V (ch.43-0; Fig. 9A–C). Abdominal sternites grayish brown; I narrow, transverse plate more or less protruded or expanded posteromedially (ch.45-1; Fig. 10A–C). Epandrium largely pubescent on dorsal to lateral portion; ventral lobe not differentiated (ch.53-0, ch.56-0; Fig. 11-1A–C 1). Surstylus plate-like, fused to epandrium but not to cercus (ch.59-0, ch.60-1, ch.63-0; Fig. 11-1A–C 1,2). Membranous aedeagus absent (ch.70-2; Fig. 11-1A–C 3,4). Phallapodeme fused to phallal sheath (ch.75-1; Fig. 11-1A–C 4). Hypoproct nearly entirely pubescent (ch.80-0; Fig. 12A–C 1). Epigynium dorsally neither constricted nor separated (ch.81-0; Fig. 12A–C 1). Hypogynial valves with trichoid sensilla on both basal and distal portions (Fig. 12A–C).
Included species. Colocasiomyia zeylanica *, C. nepalensis *, C. pinangae sp. nov., C. besaris sp. nov., and C. luciphila sp. nov. *Two known species were assigned to this species subgroup based on their original descriptions and illustrations (Okada 1986; Grimaldi 1991); although the two diagnostic characters are not confirmed for them, they share the following homoplastic synapomorphies with the other members of this subgroup: eye with stout, interfacetal setulae (ch.7-1); and claws shorter than tarsomere V (ch.43-0; “ Fig. 1A, C ” in Okada 1986).
description: 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 222, DOI: 10.11646/zootaxa.5278.2.1, http://zenodo.org/record/7905995