Isometopus, Fieber, 1860

Yeshwanth, H. M., Chérot, F. & Henry, T. J., 2021, The Isometopinae (Hemiptera: Heteroptera: Miridae) of India and Sri Lanka: A Review of the Subfamily, with Descriptions of Six New Species, Zootaxa 4903 (2), pp. 151-193 : 158

Key to Indian and Sri Lankan species of the genus Isometopus

1. Large species (total length about 3.5 mm), almost evenly yellowish brown dorsally ( Fig. 2A ); the clavii and base of scutellum slightly darker. Pronotal anterior angles pointed, partially wrapping the eyes. Sri Lanka....... Isometopus cuneatus (Distant)

– Smaller species (total length between 2.0 and 2.5 mm), with a more complex dorsal pattern, including different colours. Pronotal anterior angles never pointed and partially wrapping the eyes.................................................2

2. Scutellum yellowish, with an elongate, apically pointed, dark patch medially ( Fig. 2B ). Pronotum and hemelytra yellowish white, with apical areas of coria black............................................... Isometopus mahal (Distant)

– Pronotum, scutellum, and hemelytra differently coloured...................................................... 3

3. Scutellum almost evenly dark brown, the apex barely lighter ( Fig. 2D )........................ Isometopus wolskii , n. sp.

– Scutellum never evenly coloured......................................................................... 4

4. Pronotal disk dark brown, with the narrow lateral margins pale brown to slightly orange on inner parts ( Fig. 2C ).......................................................................................... Isometopus webbi , n. sp.

– Pronotal disk dark brown, with anterior angles and broad posterior margin yellowish. Apex of scutellum yellowish ( Fig. 2E )................................................................. ... Isometopus yoshizawai Yasunaga & Duwal

Figures

FIGURES 2. Indian Isometopinae: Isometopini. Habitus in dorsal view.A. Isometopus cuneatus (Distant, 1904). B. Isometopus mahal Distant, 1911. C. Isometopus webbi, n. sp. D. Isometopus wolskii, n. sp. E. Isometopus yoshizawai Yasunaga and Duwal, 2006. F. Paloniella feana (Distant, 1904).