Colocasiomyia besaris 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 besaris

description: 2) Colocasiomyia besaris Yafuso & Toda, sp. nov.
(Figs 2–12B, 14B)
Colocasiomyia sp.3 aff. nepalensis: Sultana et al., 2006: 694.
Diagnosis. Surstylus with 8–10 stout, longer, peg-like teeth; dorsalmost one thickest (Fig. 11-1B 2). Pregonites apically pointed, smooth on ventral margin (Fig. 11-1B 4). Epigynium with 26–28 small sensilla per side near lower posterior margin (Fig. 12B 1). Distal, narrow portion of hypogynial valve longer than basal, broad portion (Fig. 12B).
Description (♁ and ♀). Head. Antennal pedicel blackish brown; first flagellomere approximately 1.6 times as long as pedicel; arista approximately 2.1 times as long as first flagellomere (Fig. 3B). Distance between antennal scapes as wide as scape diameter (Fig. 2B 2). Facial carina wider than 1st flagellomere (Fig. 2B 2). Supracervical setae 8–10 and postoculars 18–20 per side (Fig. 4A). Cibarial projections at anterolateral corners as long as width of anterior margin; medial sensilla approximately 2–3 per side (Fig. 5B 2). Prementum and neighboring lateral membrane with 9–10 setae per side (Fig. 5B 2). Labellum with 11 pseudotracheae per side (Fig. 5B 1).
Thorax. Two katepisternal, prominent setae longer than acrostichal setulae (Fig. 7B).
Legs grayish brown, except for all tarsi pale grayish yellow (Fig. 14B). Fore tarsomere I slightly longer than tarsomeres II and III combined; mid I as long as II+III+IV; hind I slightly longer than II+III+IV (Fig. 9B). Fore tarsomere II with 1 large and 1 small pegs; latter 1/3 as long as former (Fig. 9B 1).
Abdomen. Tergites blackish brown (Fig. 14B). Male sternites III and IV as wide as long; V+VI distally deeply bilobed (Fig. 10B 1). Female sternites III–V as wide as long; VI wider than long; VII wider than long plate bilobed in distal half (Fig. 10B 2). Female tergite VII mid-dorsally separated into 2 lateral plates.
Male terminalia. Epandrium with 2–4 long setae only on lateral to ventral portion (Fig. 11-1B 1). Cercus nearly entirely pubescent except for roundish, ventral flap, with approximately 40 setae (Fig. 11-1B 1). Phallal sheath partly pubescent (Fig. 11-1B 4).
Female terminalia. Perineal membrane with patch of dense, distinct warts.
Measurements (holotype /range in 2♁ and 1♀ paratypes, in mm): BL = 1.51/♁ 1.35–1.55, ♀ 1.70; ThL = 0.67/♁ 0.72–0.73, ♀ 0.72; WL = 1.39/♁ 1.46–1.55, ♀ 1.47; WW = 0.66/♁ 0.72, ♀ 0.72.
Indices (holotype /range in 2♁ and 1♀, or less if noted, paratypes, in ratio): FW/HW = 0.54/0.53–0.56; ch/o = 0.38/0.32–0.40; prorb = 0.83/0.82–0.97; rcorb = 0.30/0.25–0.32; vb = 0.21/0.24–0.29; dcl = 0.51/0.52–0.54 (1♁ and 1♀); presctl = 0.30/0.35–0.41; sctl = 0.75/0.71–0.73 (1♁ and 1♀); sterno = 1.07/1.28–1.42; orbito = 0.35/0.38–0.45; dcp = 0.58/0.68–0.77; sctlp = 0.81/0.91–1.07; C = 2.10/1.82–2.18; 4c = 1.32/1.22–1.39; 4v = 2.54/2.33–2.61; 5x = 2.78/1.82–3.23; ac = 2.50/2.36–2.87; M = 0.99/0.91–1.02; C3F = 0.41/0.46–0.54.
Holotype. ♁ (MZB), “ Cibodas, West Java, Indonesia, 12.xii.2004, K. T. Takano / ex inflorescence of Pinanga coronata ”.
Paratypes. Indonesia: 12♁, 4♀, same data as the holotype (MZB, SEHU); 2♁ (#05200–01), 1♀ (#05226), same data as the holotype except for 24.xii.2003 (KIZ).
Distribution. Indonesia (West Java).
Remarks. This species resembles C. pinangae sp. nov., but can be distinguished from it by the diagnostic characters.
Etymology. The specific name derives from “besar” (meaning “large”) of Indonesian, referring to its larger body size among the members of the zeylanica group.
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 223-224, DOI: 10.11646/zootaxa.5278.2.1, http://zenodo.org/record/7905995