Colocasiomyia matthewsi Takano & Gao & Hu & Li & Yafuso & Suwito & Repin & Pungga & Meleng & Kaliang & Chong & Toda 2021, sp. nov.
Creators: name: Takano, Kohei Takenaka
name: Gao, Jian-Jun
name: Hu, Yao-Guang
name: Li, Nan-Nan
name: Yafuso, Masako
name: Suwito, Awit
name: Repin, Rimi
name: Pungga, Runi Anak Sylvester
name: Meleng, Paulus Ak
name: Kaliang, Clement Het
name: Chong, Lucy
name: Toda, Masanori J.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Colocasiomyia
Colocasiomyia matthewsi

description: 8) Colocasiomyia matthewsi Toda, sp. nov.
(Figs 9H, 15H, 23)
Colocasiomyia sp. aff. cristata: Fartyal et al., 2013: 768.
Diagnosis. A pair of processes on male abdominal sternite VI long (> 0.05 mm), widely separated, strongly divergent, slightly curved inward (Fig. 9H). Epandrium pubescent except for anteroventral elongation and anterior, ventral and posteroventral margins, posteroventrally extended as ventral lobe somewhat pointed and bearing many small setae on apex, with 7–8 setae on lateral portion and 30–31 setae as thick as cercal setae on ventral lobe of each side (Fig. 23C). Phallal sheath apicoventrally narrowed and apically round in lateral view (Fig. 23D). Oviscapt very short, only twice as long as wide, somewhat oval, with 23–24 ovisensilla on nearly entire surface (Fig. 23F).
Description (♂ and ♀; not repeating characters common to C. kinabaluana sp. nov.). Head. Supracervical setae 5–8 per side, distally more or less curved, longer than inner occipital setae. Cibarial, medial sensilla 3–4 per side. Supralateral setae outside prementum 3–5 per side.
Thorax. Anterior dorsocentral setae behind transverse suture.
Abdomen. Male sternite III longer than wide, posteriorly slightly narrowing; IV wider than long (Fig. 23A). Female sternite V wider than long; VI wider than long, medially concaved on posterior margin (Fig. 23B).
Male terminalia. Cercus pubescent only on dorsal 2/5, with 56–57 setae, extended below, apically forming broad lobe marginally roundish and fringed with small setae (Fig. 23C). Phallapodeme sclerotized plate slightly oblique to phallal axis (Fig. 23D).
Female terminalia. Hypoproct medially with a small patch of pubescence (Fig. 23F).
Indices (range of 10♂ and 10♀ paratypes): FW/HW = 0.53–0.58, ch/o = 0.28–0.36, prorb = 0.86–1.14, rcorb = 0.33–0.56, vb = 0.26–0.47, dcl = 0.57–0.74, sctl = 0.74–0.98, sterno = 0.65–1.10, orbito = 0.45–0.82, dcp = 0.97–1.30, sctlp = 1.27–1.82, C = 1.74–2.12, 4c = 0.92–1.08, 4v = 1.42–1.60, 5x = 0.72–1.14, ac = 2.60–3.45, M = 0.28–0.40.
Holotype. ♂ (MPMP), “ Gandara, Samar, Philippines, 2.xii.2012, ex Alocasia macrorrhizos, P.J. Matthews, M. Medecilo & J.R. Castillo ”.
Paratypes. Philippines: 10♂, 10♀, same data as the holotype (MPMP, SEHU).
Distribution. Philippines (Samar).
Remarks. This species was placed as the basal branch sister to the clade (BP = 100) consisting of the remaining four species of the cristata complex (Fig. 13), lacking the following synapomorphies for the latter clade: anterior dorsocentral setae just beside transverse suture (ch.7-1), epandrium posteroventrally roundish (ch.30-1) and with setae thicker than cercal setae (ch.32-1), phallapodeme less sclerotized thin plate (ch.45-2) directed nearly perpendicular to axis of phallal sheath (ch.46-1), and hypoproct not pubescent (ch.48-1). In addition, within the latter clade, C. sulawesiana, C. kinabaluana sp. nov. and C. kotana sp. nov. formed a clade (BP = 75; Fig. 13) supported by an autapomorphy, the short (<0.05 mm) processes on the male sternite VI (ch.25-1; Fig. 9I–K). Furthermore, C. matthewsi sp. nov. somewhat resembles C. grandis sp. nov. in the morphology of periphallic organs (Figs 16D, 23C), but can be distinguished from it by their diagnostic characters.
Etymology. Patronym, dedicated to Prof. Peter J. Matthews, one of the three collectors of the specimens.
description: Published as part of Takano, Kohei Takenaka, Gao, Jian-Jun, Hu, Yao-Guang, Li, Nan-Nan, Yafuso, Masako, Suwito, Awit, Repin, Rimi, Pungga, Runi Anak Sylvester, Meleng, Paulus Ak, Kaliang, Clement Het, Chong, Lucy & Toda, Masanori J., 2021, Phylogeny, taxonomy and flower-breeding ecology of the Colocasiomyia cristata species group (Diptera: Drosophilidae), with descriptions of ten new species, pp. 1-70 in Zootaxa 5079 (1) on pages 34-37, DOI: 10.11646/zootaxa.5079.1.1, http://zenodo.org/record/5766402