Colocasiomyia oligochaeta Zhang & Gao & Takano & Yafuso & Suwito & Meleng & Toda 2023, sp. nov.
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 oligochaeta

description: 4) Colocasiomyia oligochaeta Zhang & Toda, sp. nov.
(Figs 2–12D, 14D)
Colocasiomyia sp.2 aff. nepalensis: Sultana et al., 2006: 694; Fartyal et al., 2013: 768.
Diagnosis. Antennal arista approximately 1.8 times as long as first flagellomere (Fig. 3D). Distance between antennal scapes as wide as scape diameter (Fig. 2D 2). Acrostichal setulae in 6 rows (Fig. 6D). All legs entirely grayish yellow to yellow except for grayish brown tarsomere Vs (Fig. 14D). Cercus slightly projected at apicoventral corner (Fig. 11-2D). Long, tube-like, membranous aedeagus ornamented with relatively sparse and weak spinules (Fig. 11-2D). Hypogynial valves with dorsal flaps fused into small, ligulate plate at distal end of basal portion (Fig. 12D).
Description (♁ and ♀). Head. Antennal, first flagellomere approximately 1.7 times as long as pedicel (Fig. 3D). Gena grayish yellow (Fig. 14D). Supracervical setae 6–9 and postoculars 13–15 per side (Fig. 4D). Cibarial projections at anterolateral corners shorter than width of anterior margin; medial sensilla in parallel rows wider than sensilla campaniformia (Fig. 5D 2). Prementum and neighboring lateral membrane with approximately 5 setae per side (Fig. 5D).
Thorax. Scutum and scutellum glossy, blackish brown; pleura grayish brown (Fig. 14D).
Legs. Fore tarsomere I as long as II+III (Fig. 9D 1).
Abdomen. Sternites grayish brown.
Male terminalia. Cercus pubescent except for anterior to ventral margin, with approximately 32 setae.
Female terminalia. Epigynium with 5–6 sensilla per side near lower posterior margin (Fig. 12D 1).
Measurements (holotype /range in 5♁ and 5♀, or less if noted, paratypes, in mm): BL = 1.51/♁ 1.30–1.62, ♀ 1.42–1.64 (4♀); ThL = 0.69/♁ 0.59–0.75, ♀ 0.59–0.71; WL = 1.35/♁ 1.20–1.44, ♀ 1.14–1.38; WW = 0.66/♁ 0.62–0.76, ♀ 0.54–0.72.
Indices (holotype /range in 5♁ and 5♀, or less if noted, paratypes, in ratio): FW/HW = 0.56/0.56–0.62; ch/o = 0.34/0.34–0.39; rcorb = 0.44/0.47–0.60 (4♁ and 3♀); vb = 0.33/0.27–0.38; sctl = 0.62/0.61–0.74 (4♁ and 5♀); sctlp = 1.10/0.89–1.17; C = 1.44/1.28–1.47; 4c = 1.74/1.69–2.13; 4v = 2.57/2.60–3.15; 5x = 4.61/4.02–5.11; ac = 3.05/2.72–3.57; M = 1.15/1.10–1.34.
Holotype. ♁ (MZB), “ Cibodas, West Java, Indonesia, 12.xii.2004, K. T. Takano / ex inflorescence of Pinanga coronata ”.
Paratypes. Indonesia: 5♁, 10♀, same data as the holotype, 7 ♁, 20♀, same data as the holotype except for 24.xii.2003 (MZB, SEHU); 10 ♁, 10♀ (#05180–99), same data as the holotype except for 24.xii.2003 (KIZ).
Distribution. Indonesia (West Java).
Etymology. Referring to the lack of some setae from the head and thorax.
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 pages 226-227, DOI: 10.11646/zootaxa.5278.2.1, http://zenodo.org/record/7905995