Colocasiomyia oligochaeta Zhang & Toda, 2023

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, Zootaxa 5278 (2), pp. 201-238 : 226-227

publication ID	https://doi.org/ 10.11646/zootaxa.5278.2.1
publication LSID	lsid:zoobank.org:pub:697AC989-141D-4A89-8F02-5A4644E303EA
DOI	https://doi.org/10.5281/zenodo.7907982
persistent identifier	https://treatment.plazi.org/id/03C687D9-FFCF-FFFA-A5C6-FCC7857DE5E9
treatment provided by	Plazi
scientific name	Colocasiomyia oligochaeta Zhang & Toda
status	sp. nov.

Treatment

4) Colocasiomyia oligochaeta Zhang & Toda View in CoL , sp. nov.

( Figs 2–12D View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 12 , 14D View FIGURE 14 )

Colocasiomyia sp.2 aff. nepalensis: Sultana et al., 2006: 694 View in CoL ; Fartyal et al., 2013: 768.

Diagnosis. Antennal arista approximately 1.8 times as long as first flagellomere ( Fig. 3D View FIGURE 3 ). Distance between antennal scapes as wide as scape diameter ( Fig. 2D 2 View FIGURE 2 ). Acrostichal setulae in 6 rows ( Fig. 6D View FIGURE 6 ). All legs entirely grayish yellow to yellow except for grayish brown tarsomere Vs ( Fig. 14D View FIGURE 14 ). 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 View FIGURE 12 ).

Description (♁ and ♀). Head. Antennal, first flagellomere approximately 1.7 times as long as pedicel ( Fig. 3D View FIGURE 3 ). Gena grayish yellow ( Fig. 14D View FIGURE 14 ). Supracervical setae 6–9 and postoculars 13–15 per side ( Fig. 4D View FIGURE 4 ). Cibarial projections at anterolateral corners shorter than width of anterior margin; medial sensilla in parallel rows wider than sensilla campaniformia ( Fig. 5D View FIGURE 5 2 View FIGURE 2 ). Prementum and neighboring lateral membrane with approximately 5 setae per side ( Fig. 5D View FIGURE 5 ).

Thorax. Scutum and scutellum glossy, blackish brown; pleura grayish brown ( Fig. 14D View FIGURE 14 ).

Legs. Fore tarsomere I as long as II+III ( Fig. 9D View FIGURE 9 1 View FIGURE 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 View FIGURE 12 1 View FIGURE 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.