Chopralla fusina
General appearance
Body size small up to about 4mm long (excluding antennae & cerci)
Abdomen dorso-ventrally flattened to give a stout impression (cf. an elongated body shape of Labiobaetis)
Head
The details for mouthparts
illustrated in the following pictures
Thorax
No villiopore on femora
Presence of a row of long setae along tibiae & a transverse row of long setae across tibiaea
Claw with two rows of 3 denticles (cf. no denticle in Cloeodes longisetosus)
Dark brown marking on dorsum of fermora submedially, on tibiae & tarsi proximally
(see the picture below)
Abdomen
Gills I - VII single, tracheated, a pale coloration on tergum VIII
Terminal filament is not reduced -- 3 caudal filaments are shown clearly; cerci length is about less than half of body length
Legs |
Its mouthparts of labrum, mandibles, maxillae and labium are illustrated as follow (hypopharynx is excluded).
Labrum |
Maxillae |
Mandibles |
Labium |
Distribution:
In Hong Kong, specimens are recorded from Sam A Shui Tsuen (Lantau Island), Shing Mun,
Lam Tsuen River, Pak Tam Chung, Tai Shui Hang (Ma On Shan).
Reference:
Tong, X. & Dudgeon, D. (2003) First record of the genus Chopralla (Ephemeroptera, Baetidae) from China, and description of a new species. Raffles’ Bulletin of Zoology 51: 17-19.