View Image Gallery of Tribe Geometrini

Berta zygophyxia Prout
Berta chrysolineata zygophyxia Prout, 1912, Genera Insectorum 124: 234.

Berta zygophyxia
(lectotype, Singapore)

Diagnosis. B. zygophyxia
has similar facies to copiosa but is perhaps a greyer green with the white patches less crisply defined. A male from Penang (slide 17309) is tentatively associated with zygophyxia, where the female is distinguished by a prominent pouch containing the ostium, which is shorter, broader, unsclerotised in comparison with hemisponsa and copiosa. This male has both sternite and tergite on the eighth segment modified with shallow, sclerotised processes; the valve lacks a process distal to the groove.

Taxonomic notes. B. zygophyxia was originally described as a subspecies of chrysolineata and based on two females from Singapore and two males from Bali. Prout later (1934, Gross-Schmett. Erde 12: 127) appeared to relate the concept of zygophyxia more strongly to the Singapore material, hence the female identified by slide 17322 is hereby designated LECTOTYPE. The Bali males (slide 17313) proved to be copiosa.

Geographical range. Peninsular Malaysia, Singapore, Borneo.

Habitat preference. A single female was taken at 1000m in lower montane forest on G. Mulu.

<<Back >>Forward <<Return to Contents page

Copyright © Southdene Sdn. Bhd. All rights reserved.