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Cheiracanthium

This genus is known for its sac spiders. There are more than 200 spiders under this genus.

Cheiracanthium Spider

Spider Belonging to this Genus

Yellow Sac (Cheiracanthium inclusum)  

Physical Description and Identification

Adults

Size: Both male and female spiders grow to be 0.20-0.39 in (0.5-0.99 cm).

Color: Usually, their bodies are pale, and their abdomens can be beige or yellow, or some shades in between.

Other Characteristic Features: The cymbium of male spiders is directed backward. The tarsi are also not outward, neither are they pointed inwards.

Eggs

Spiders of this genus create egg sac first before laying eggs into them. The number of egg sacs can be multiple in a lifetime of female spiderlings.

Spiderlings

Some spiderlings live inside the sac for a few days, post-hatching, and then separate to be living independently.

The Web

Most spiders build a silken retreat instead of webs.

Are Spiders of Cheiracanthium Venomous

Some species like C. japonicum, C. inclusum, C. punctorium, and C. mildei, are venomous enough to affect a human individual.

Quick Facts

Other Names Yellow sac spiders
Distribution Southern Africa, Japan, India, Australia, Canada, and certain countries of Europe
Habitat Lowland mainland, cotton field, backyard, unused houses and garages
Diet Insects
Lifespan 1-2 years

Did You Know

  • The genus was described for the first time in 1839, by the German entomologist, Carl Ludwig Koch.
  • The epithet of the name of the genus has come from the Greek word “Cheir” and “Acanthium”. The former means hand, while the latter one is a genus of a plant that has thorny stems.

Image Credits: wongchunxing.com

This genus is known for its sac spiders. There are more than 200 spiders under this genus.

Cheiracanthium Spider

Spider Belonging to this Genus

Yellow Sac (Cheiracanthium inclusum)  

Physical Description and Identification

Adults

Size: Both male and female spiders grow to be 0.20-0.39 in (0.5-0.99 cm).

Color: Usually, their bodies are pale, and their abdomens can be beige or yellow, or some shades in between.

Other Characteristic Features: The cymbium of male spiders is directed backward. The tarsi are also not outward, neither are they pointed inwards.

Eggs

Spiders of this genus create egg sac first before laying eggs into them. The number of egg sacs can be multiple in a lifetime of female spiderlings.

Spiderlings

Some spiderlings live inside the sac for a few days, post-hatching, and then separate to be living independently.

The Web

Most spiders build a silken retreat instead of webs.

Are Spiders of Cheiracanthium Venomous

Some species like C. japonicum, C. inclusum, C. punctorium, and C. mildei, are venomous enough to affect a human individual.

Quick Facts

Other Names Yellow sac spiders
Distribution Southern Africa, Japan, India, Australia, Canada, and certain countries of Europe
Habitat Lowland mainland, cotton field, backyard, unused houses and garages
Diet Insects
Lifespan 1-2 years

Did You Know

  • The genus was described for the first time in 1839, by the German entomologist, Carl Ludwig Koch.
  • The epithet of the name of the genus has come from the Greek word “Cheir” and “Acanthium”. The former means hand, while the latter one is a genus of a plant that has thorny stems.

Image Credits: wongchunxing.com

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