Clubiona riparia
L. Koch, 1866
Riparian Sac Spider
Clubiona riparia is a sac spider in the Clubionidae. It is known from a broad geographic range spanning northern Eurasia and North America. The specific epithet 'riparia' refers to its association with riparian . Like other Clubiona species, it constructs silken retreats rather than prey-capture webs and hunts actively.
Pronunciation
How to pronounce Clubiona riparia: /kluːˈbaɪə.nə rɪˈpɛə.rɪə/
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Identification
Can be distinguished from the similar Cheiracanthium (longlegged sac spiders) by the presence of a distinct groove in the center of the and a tuft of curved setae on the front edge of the . Cheiracanthium lacks both of these characters.
Images
Habitat
Riparian environments—associated with riverbanks, floodplains, and waterways, as indicated by its specific epithet.
Distribution
Russia (Urals to Far East), Mongolia, China, Japan, and North America. Canadian records include Alberta.
Behavior
Constructs silken sac-like retreats for shelter. Does not build webs for prey capture; hunts actively 'on foot.'
Similar Taxa
- CheiracanthiumFormerly classified in Clubionidae; lacks groove and abdominal setal tuft present in Clubiona; more frequently encountered indoors
- HibanaGhost spiders in Anyphaenidae; similar active-hunting and sac construction, but different family and morphological characters