Japanagromyza browni, Sasakawa, Mitsuhiro, 2010

Sasakawa, Mitsuhiro, 2010, A review of the Oriental Japanagromyza Sasakawa (Diptera: Agromyzidae), with descriptions of four new species, Zootaxa 2485, pp. 16-32 : 19-21

Japanagromyza browni sp. nov.

(Figs. 1–3)

Diagnosis. This species has a coppery shining black thorax and abdomen, yellow halter, two long spines on antero-ventral margin of the epandrium, and two extremely long tubules of the distiphallus.

Description. MALE: Black; arista dark brown; thorax sparsely gray dusted, mesoscutum and scutellum with coppery sheen; abdomen strongly reddish-coppery shining. Wing with veins yellow at bases; calypter yellow, with pale brown fringe; halter yellow, with stalk brownish tinged.

FIGURES 1–7. Male genitalia of Japanagromyza browni sp. nov. (1–3, holotype) and J. cestra sp. nov. (4–7, holotype). 1, epandrium, surstylus, cercus, proctiger, anterior view; 2, 6, phallus, lateral view; 3, 7, ejaculatory apodeme; 4, surstylus, inner view; 5, cercus, proctiger, anterior view. Scale= 0.1 mm.

Frons as wide as eye; oc shorter than lower ori; lunule lower than semicircle; eye 1.3 times as high as wide; gena 1/11 as high as eye. Antenna with arista as long as eye height, microscopically pubescent.

Mesoscutum with about 10 rows of acr, prsc 1/2 length of posterior dc. Wing 2.0 mm long, costa with three sections in proportion of 3.3: 1: 0.9, r-m at basal 1/3 of discal cell, ultimate section of M1 2.3 times as long as penultimate, ultimate section of CuA1 about 2/3 as long as penultimate. Fore tibia with lateral bristle.

S6 1.7 times as wide as long, thrice as long as S5, 1.3 times as wide as S5. Genitalia: Epandrium with two long spines and a seta on anterior margin at middle; surstylus projected inwardly, pointed on tip; cercus 4/5 as high as epandrium, broad, with many rows of minute spinules in inner ventral part. Proctiger weakly sclerotized. Hypandrium 660 µm long, sidepieces narrow U–shaped, basal apodeme 1/6 length of sidepiece; postgonite narrow, semicircular. Phallapodeme 730 µm long; phallus 880 µm long; epiphallus prolonged ventrally; basiphallus bifurcate distally, hypophallus narrow but long, distiphallus 560 µm long, with two extremely long distal tubules, folded at middle, transparent distally, surrounded by membrane with sparse microscopic hairs at base. Ejaculatory apodeme 330 µm long, blade asymmetrically expanded, 180 µm in greatest width.

Body length 2.1 mm.

FEMALE and HOSTPLANT. Unknown.

Type material. Holotype 3( QSBG), Thailand, Phetchabun Prov., Khao Kho National Park, view point at Klump stream, 16º39.120΄N, 246 m, 5–12. IX. 2006, S. Chachumnan and S. Singtong, Malaise trap.

Distribution. Thailand.

Remarks. This new species closely resembles Japanagromyza cupreata Sasakawa in general appearance, but distinctly differs from it in structure of the male genitalia with the epandrial spinosity, spinulose cercus, simple hypophallus, and extremely long distiphallus in J. browni sp. nov. (genitalia of cupreata described below). Long distiphallic tubules of this species are similar to those of J. cercariae Sasakawa , but this new species is easily separable from it by its coppery-shining mesoscutum and abdomen, paler stalk of the halter, longer surstylus without apical spine, and longer hypophallus.

Etymology. The specific name is dedicated to a reader of TIGER project in Thailand, Dr. Brian V. Brown, Natural History Museum of Los Angeles County.