Phylogeny, taxonomy and flower-breeding ecology of the Colocasiomyia cristata species group (Diptera: Drosophilidae), with descriptions of ten new species Author Takano, Kohei Takenaka Author Gao, Jian-Jun Author Hu, Yao-Guang Author Li, Nan-Nan Author Yafuso, Masako Author Suwito, Awit Author Repin, Rimi Author Pungga, Runi Anak Sylvester Author Meleng, Paulus Ak Author Kaliang, Clement Het Author Chong, Lucy Author Toda, Masanori J. text Zootaxa 2021 2021-12-08 5079 1 1 70 journal article 2931 10.11646/zootaxa.5079.1.1 010695ef-a142-42ad-81d7-2e7ed1f7e89e 1175-5326 5766402 2B118B81-7353-4A2C-A892-5466DFC83230 3) Colocasiomyia vieti Toda , sp. nov. ( Figs 9F , 15C , 18 ) Colocasiomyia sp.2 aff. diconica : Sultana et al ., 2006: 694 . Diagnosis. Male abdominal sternite VI with a pair of long processes nearly straight and divergent ( Fig. 9F ). Description ( ♂ and ♀ ; not repeating characters common to C . grandis sp. nov. ). Head. Supracervical setae 4–6 per side. Thorax. Anterior dorsocentral setae behind transverse suture. Prescutellar acrostichal setae absent; acrostichal setulae in 2 or 4 rows. Apical scutellar setae slightly more distant to each other than to basal scutellar seta. Legs. Patch covered with only minute pubescence absent on anterodorsal portion of fore tarsomere I. Abdomen. Male: sternites III and IV wider than long. Female: sternites III–V longer than wide; VI as wide as long, posteriorly dilated, medially notched on posterior margin. Male terminalia. Epandrium pubescent except for narrow anterior to ventral margin and anteroventral elongation, roundish on posteroventral margin ( Fig. 18A ). Surstylus long, moderately broad plate with 5–6 recurved teeth apically and 1 trichoid seta ventrosubapically ( Fig. 18A ). Median piece of subepandrial sclerite medially and anteriorly bilobed into long lobes. Cercus pubescent except for anterior margin and apical portion, slightly constricted ventrosubapically, with 34–36 setae all over and small setae on apicoventral margin ( Fig. 18A ). Phallal sheath apically broadly round in lateral view ( Fig. 18B ). FIGURE 18. Colocasiomyia vieti Toda , sp. nov. (♂ holotype, ♀ paratype, and puparium from Cuc Phuong, Nho Quan District, Vietnam). A, Periphallic organs (lateral view; inset: surstylus distal portion); B, phallic organs (lateral view); C, ditto (ventral view); D, female terminalia (lateral view); E, puparium (ventral habitus); F, caudal-most portion of puparium (ventral view); G, anterior spiracles of puparium (dorsal view); H, mouth hook; I, cephalopharyngeal skeleton. Scale bars: 0.1 mm in A–D and I, 1.0 mm in E. Female terminalia. Oviscapt with 16–18 ovisensilla ( Fig. 18D ). Indices (range of holotype and 3♂ and 3♀ paratypes ): FW/HW = 0.54–0.57, ch/o = 0.43–0.56, prorb = 0.86– 1.03, rcorb = 0.44–0.52, vb = 0.34–0.47, dcl = 0.50–0.73, sctl = 0.65–0.83, sterno = 0.58–0.78, orbito = 0.64–0.89, dcp = 0.63–0.94, sctlp = 0.62–0.95, C = 2.08–2.39, 4c = 0.89–1.04, 4v = 1.46–1.70, 5x = 0.90–1.13, ac = 2.81–3.14, M = 0.36–0.47. Puparium (3rd instar larva). Anterior spiracle with stalk ending in a whorl of 9–11 branches; stalk longer than longest branch; caudal segments elongate, ending in Y-shaped posterior spiracles ( Fig. 18E–G ). Mouth hook: distal blade as long as basal portion, apically pointed, gently curved downward, with small, acute teeth ( Fig. 18H ). Holotype . ♂ ( SEHU ), “ Cuc Phuong , Nho Quan District , Vietnam , 2.iv.2000 , ex Alocasia atropurpurea , M. Yafuso ”. Paratypes . Vietnam : 3♂ , 3♀ , same data as the holotype ( SEHU ) . Distribution. Vietnam . Remarks. This species resembles C . grandis sp. nov. in many characters, but can be distinguished from it by the diagnostic character and the absence of patch covered with only minute pubescence on anterodorsal portion of fore tarsomere I. Etymology. Patronym, dedicated to Dr. B. T. Viet who helped MY with field work in Vietnam .