Paegoniodes cupulatus

General appearance
Body color reddish brown; size large up to 14mm long (excluding antennae & cerci)
3 cerci slightly longer than body length

Head
The details for mouthparts illustrated in the following pictures

Thorax
* Pronotum not expanded laterally
The details for legs illustrated in the following pictures

Abdomen
Gills I - VII: Gill I greatly reduced to small plate; Gills II - VII well tracheated; all gills with fibrilliform portion
Minute spines on posterior margin on all terga

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 Mui Tsz Lam, Wang Shan Keuk (Tai Po), Tai Po Kau Forest Stream, Shing Mun, Tsuen Lung, Ng Tung Chai, Lam Tsuen River, Wu Kau Tang, Pak Tam Chung, Ho Chung (Sai Chung) and Tai Lam Chung, Pui O, Wang Lung Hang, Wang Shan Keuk and Sam A Shui Tsuen (Lantau Island).