Colocasiomyia luciphila 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 : 224-225

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.7907980
persistent identifier	https://treatment.plazi.org/id/03C687D9-FFC1-FFF8-A5C6-FAA9820BE1F9
treatment provided by	Plazi
scientific name	Colocasiomyia luciphila Zhang & Toda
status	sp. nov.

Treatment

3) Colocasiomyia luciphila Zhang & Toda View in CoL , sp. nov.

( Figs 2–12C 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 , 14C View FIGURE 14 )

Colocasiomyia sp.5 aff. nepalensis: Fartyal et al., 2013: 769 View in CoL .

Diagnosis. Antennal, first flagellomere approximately 2.4 times as long as pedicel; arista approximately 1.6 times as long as first flagellomere ( Fig. 3C View FIGURE 3 ). Fore tarsomere II with 2 pegs; smaller peg slightly longer than 1/2 of larger one ( Fig. 9C View FIGURE 9 1 View FIGURE 1 ). Male sternites III and IV longer than wide; V+VI concave on distal margin ( Fig. 10C View FIGURE 10 1 View FIGURE 1 ). Female sternites III–VI longer than wide; VII much wider than long, slightly convex on distal margin ( Fig. 10C View FIGURE 10 2 View FIGURE 2 ). Surstylus with 6–7 stout, longer, peg-like teeth nearly uniform in thickness (Fig. 11-1C 1,2). Pregonites apically roundish, smooth on ventral margin (Fig. 11-1C 4a). Epigynium with 2–6 small sensilla per side near lower posterior margin ( Fig. 12C View FIGURE 12 1 View FIGURE 1 ). Distal, narrow portion of hypogynial valve half as long as basal, broad portion ( Fig. 12C View FIGURE 12 ).

Description (♁ and ♀). Head. Antennal pedicel grayish brown. Distance between antennal scapes as wide as scape diameter ( Fig. 2C 2 View FIGURE 2 ). Facial carina narrower than 1st flagellomere ( Fig. 2C 2 View FIGURE 2 ). Supracervical setae 6–8 and postoculars 13–18 per side ( Fig. 4C View FIGURE 4 ). Cibarial projections at anterolateral corners slightly longer than width of anterior margin; medial sensilla approximately 3–4 per side ( Fig. 5C View FIGURE 5 2 View FIGURE 2 ). Prementum and neighboring lateral membrane with 7–8 setae per side ( Fig. 5C View FIGURE 5 2 View FIGURE 2 ). Labellum with 11–13 pseudotracheae per side ( Fig. 5C View FIGURE 5 1 View FIGURE 1 ).

Thorax. Prescutellar, acrostichal setae only slightly longer than acrostichal setulae ( Fig. 6C View FIGURE 6 ). Only one prominent katepisternal seta longer than acrostichal setulae ( Fig. 7C View FIGURE 7 ).

Legs grayish brown, except for all tarsi pale grayish yellow ( Fig. 14C View FIGURE 14 ). Fore, mid and hind tarsomere Is as long as II+III, II+III+IV and II+III+IV+V, respectively ( Fig. 9C View FIGURE 9 ).

Abdomen. Tergites dark grayish brown ( Fig. 14C View FIGURE 14 ). Female tergite VII mid-dorsally separated into 2 lateral plates.

Male terminalia. Epandrium with approximately 4 long setae only on lateral to ventral portion (Fig. 11-1C 1). Cercus entirely pubescent, round on ventral margin, with 28–29 setae (Fig. 11-1C 1). Phallal sheath partly pubescent (Fig. 11-1C 4,b).

Female terminalia. Perineal membrane without patch of dense, distinct warts.

Measurements (holotype /range in 1♁ and 3♀ paratypes, in mm): BL = 1.51/♁ 1.59, ♀ 1.40–1.92; ThL = 0.60/♁ 0.60, ♀ 0.48–0.75; WL = 1.22/♁ 1.23, ♀ 1.06–1.55; WW = 0.57/♁ 0.61, ♀ 0.50–0.73.

Indices (holotype /range in 1♁ and 3♀, or less if noted, paratypes, in ratio): FW/HW = 0.48/0.49–0.55; ch/o = 0.29/0.33–0.38; prorb = 0.86/0.82–1.08; rcorb = 0.32/0.29–0.40; vb = 0.17/0.18–0.25 (3♀); dcl = 0.39/0.35– 0.40 (1♁ and 2♀); presctl = 0.20/0.21–0.25 (1♁ and 2♀); sctl = 0.56/0.52–0.60; orbito = 0.45/0.33–0.47; dcp = 0.54/0.49–0.59; sctlp = 0.93/0.88–1.03; C = 1.57/1.49–1.64; 4c = 1.61/1.39–1.64; 4v = 2.39/2.20–2.63; 5x = 2.61/2.62–2.75; ac = 3.27/2.49–3.09; M = 0.90/0.78–0.92; C3F = 0.60/0.49–0.72.

Holotype. ♁ ( RDID), “ Lambir Hills National Park , Sarawak, Malaysia, 25–26.i.2012, ex light trap (LT-35), M.J. Toda ”.

Paratypes. Malaysia: 5♀, same data as the holotype ( SEHU) ; 1♀, same except for 26–27.i.2012, 1♀, same except for 23.i.2012, ex florescent light, 1♀, same except for 25.i.2012, ex florescent light ( RDID) ; 1♁ (#05225), same data as the holotype , 1♀ (#05223), same except for 23–24.i.2012 (Lot #229), 1♀ (#05224), same except for 24–25.i.2012 (Lot #230) ( KIZ) .

Distribution. Malaysia ( Sarawak).

Remarks. This species resembles C. nepalensis in having only one prominent, katepisternal seta and two pegs less different in length on the fore tarsomere II, but can be distinguished from it by the arista 1.6 times as long as first flagellomere (in C. nepalensis : “2.5× the length of flagellomere I”; Grimaldi 1991), cibarial medial sensilla in parallel rows as wide as sensilla campaniformia (narrower than the latter; “ Fig. 7 View FIGURE 7 ” in Grimaldi 1991), the facial carina narrower than 1st flagellomere (wider than the latter; “ Fig. 6 View FIGURE 6 ” in Grimaldi 1991), and the absence of membranous aedeagus (“Distiphallus fusiform, apically with fine spicules, covered with membrane”). On the other hand, the following characters suggest some relatedness to the oligochaeta species subgroup described below: only one prominent, katepisternal seta; prescutellar, acrostichal setae less differentiated; and male sternites III and IV and female III–VI longer than wide.

Etymology. Referring to its nature of being attracted to light.