Caponiidae

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Caponiidae
Caponia sp.

Caponia sp.

Systematics
Class : Arachnids (arachnida)
Order : Spiders (Araneae)
Subordination : Real spiders (Araneomorphae)
Partial order : Haplogynae
Superfamily : Caponioidea
Family : Caponiidae
Scientific name of the  superfamily
Caponioidea
???
Scientific name of the  family
Caponiidae
Simon , 1890

The Caponiidae are the only family of the Caponioidea within the real spiders . They include 15 genera and 98 species . (As of June 2016)

The spiders in this family are mainly found in southwest North America and South America . Some species are Africa home.

description

Distribution map of the Caponiidae

Nine genera only have two eyes, which is why these spiders are called two-eyed spiders in English . The representatives of the genus Caponia still have 8 eyes, the Nopsida species have 4 eyes. While many other members of the real spiders reduced their anterior median eyes early on in their evolutionary development, this pair of anterior median eyes is still present in most Caponiidae and is usually particularly large. Another unusual feature of the family is the absence of the book lung . Members of the Caponiidae each have a pair of tubular and sieve tracheoes .

Behavior and way of life

Little is known about their prey and habits. The ecribellate spiders of the genera Orthonops and Tarsonops spin silky cells under rocks and stones in arid habitats that they leave during the night to hunt. Willis John Gertsch reports that they can be found more often in the communal webs of social spiders.

Systematics and distribution

The World Spider Catalog currently lists 15 genera and 98 species for the Caponiidae. (As of June 2016)

Web links

Commons : Caponiidae  - collection of images, videos and audio files

Caponiidae in the World Spider Catalog

literature

Individual evidence

  1. ↑ a b Natural History Museum of the Burgergemeinde Bern: World Spider Catalog Version 17.0 - Caponiidae . Retrieved June 7, 2016.
  2. ^ Gertsch, Willis J. 1979: American Spiders, 2nd edition. Van Nostrand Reinhold, New York. ISBN 0-442-22649-7