Clubiona mixta

Emerton, 1890

Mixed Sac Spider

Clubiona mixta is a sac spider in the Clubionidae, described by Emerton in 1890. It is one of many in the Clubiona, which are characterized by having a distinct groove in the center of the and a tuft of curved setae on the front edge of the . These features help distinguish Clubiona from the superficially similar genus Cheiracanthium (longlegged sac spiders), which lacks both characters. Sac spiders in this family are active hunters that do not build webs to capture prey.

Pronunciation

How to pronounce Clubiona mixta: /kluːˈbaɪ.ə.nə ˈmɪks.tə/

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Identification

Clubiona can be distinguished from the similar longlegged sac spiders (Cheiracanthium, Eutichuridae) by two key characters: a distinct groove in the center of the , and a tuft of curved setae (hairs) on the front edge of the . Cheiracanthium lacks both of these features. Within Clubiona, species-level identification typically requires examination of genitalia and other subtle morphological features.

Distribution

Recorded from Canada (Alberta, Manitoba, Ontario) and the United States. The broader Clubiona occurs in forested across North America.

Behavior

Sac spiders in the Clubionidae are active hunters that do not construct webs to capture prey. They spin silken retreats for resting and for depositing sacs.

Ecological Role

Sac spiders are of small insects and other arthropods. They serve as prey for spider wasps (Pompilidae); the Clubiona obesa has been documented as a for the spider wasp Priocnemis minorata.

Human Relevance

Clubiona are not commonly encountered indoors, unlike the related longlegged sac spiders (Cheiracanthium). They pose minimal direct interaction with humans.

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