Argyrochlamys hajiesmaeiliani, Grichanov & Gilasian, 2023

Grichanov, I. Ya. & Gilasian, E., 2023, Three new species of the genus Argyrochlamys Lamb, 1922 (Diptera: Dolichopodidae) from mangroves of Iran and Oman, Russian Entomological Journal 32 (2), pp. 210-220 : 211

KEY TO ARGYROCHLAMYS SPECIES FROM INDIAN OCEAN COAST AND ISLANDS

1. Distal section of M 1+ 2 in middle with nearly right-angular curvation; female postpedicel about as long as high, with distinctly dorsal stylus ................................................. 2

— Distal section of M 1+ 2 in middle with gentle (about 45°) curvation; female postpedicel 1.5–1.7 times longer than high, with nearly apical stylus ..................................... 5

2. Distal section of M 1+2 without stublike vein; costal section between R 1 and R 2+3 distinctly shorter than costal section between R 2+3 and R 4+5 (3/4 to 9/10) ............................. 3

— Distal section of M 1+2 with short stublike vein; costal section between R 1 and R 2+3 at least as long as costal section between R 2+3 and R 4+5 ...................................... 4

3. Abdomen blackish green, with only posterior margins of tergites narrowly yellow; thorax entirely dark; mid coxa yellow, brownish at base; 4.4–4.8 mm ...... A. impudicus

— Abdominal tergite 1 mostly yellow and tergite 2 entirely yellow, other segments with posterior margins of tergites yellow; thorax with yellow metapleuron and scutellum; mid coxa mostly black, yellow at apex; 3 mm .... ....................................................................... A. decolor

4. Abdomen with tergites 1 and 2 yellow, tergite 3 entirely yellow or with small brown or blackish spot dorsally, and tergites 4 and 5 mostly black; maximal face width 1.4–1.6 times as postpedicel height; distal section of M 4 2.2–2.5 times longer than dm-m; fore tarsus 1.2 times as long as fore tibia; male postpedicel 1.7–1.9 times longer than high; 3.3–3.8 mm .................... A. hajiesmaeiliani sp.n.

— Abdomen with only tergite 2 mostly yellow, with small black spot dorsally and other tergites mostly black; maximal face width 1.8 times as postpedicel height; distal section of M 4 3.1 times longer than dm-m; fore tarsus 1.5 times as long as fore tibia; male postpedicel 1.5 times longer than high; 3.5 mm .............................. ........................................................ A. nigrescens sp.n.

5. Mesonotum entirely orange-yellow; fore coxa with either yellow or black cilia .................................................... 6

— Mesonotum mostly dark; fore coxa with black cilia ... 7

6. Coxae with yellow cilia and bristles; female arista-like stylus as long as postpedicel; costal section between R 1 and R 2+3 3.2 times longer than costal section between R 2+3 and R

4+5

; 3.5 mm (females only) ............... A. marshalli

— Coxae with black cilia and bristles; female arista-like stylus distinctly shorter than postpedicel (20/25); costal section between R 1 and R 2+3 2.8 times longer than costal section between R 2+3 and R 4+5 ......... A. tomkovichi sp.n.

7. Arista-like stylus distinctly longer than postpedicel; mid tibia without ventral setae; 3.7 mm (females only) ..... .................................................................... A. erythreus

— Arista-like stylus 2 times shorter than postpedicel in male and slightly shorter than that in female; mid tibia with 2 ventral setae; 3.75 mm ................................. A. cavicola