Dwarf six-eye spiders

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Dwarf six-eye spiders
Tapinesthis inermis, female

Tapinesthis inermis , female

Systematics
Class : Arachnids (arachnida)
Order : Spiders (Araneae)
Subordination : Real spiders (Araneomorphae)
Partial order : Haplogynae
Superfamily : Dysderoidea
Family : Dwarf six-eye spiders
Scientific name
Oonopidae
Simon , 1890

The dwarf six-eye spiders (Oonopidae) are a family of real spiders and comprise 113 genera with 1628 species . (As of July 2016)

distribution

Distribution map of the six-eye spiders

The smallest representative is Orchestina saltitans , which is only 1 to 1.5 mm in size. It has spread far to the northeast in the United States, where it sometimes dangles from lampshades as a pet, can be found in the bathroom closet, or runs across the desk. Orchestina moaba and other species, such as some of the genera Oonops , Opopaea , Scaphiella or Triaeris, are found in the southwest of the USA. The bright orange animals come to the fore when you examine the detritus on the floor.

Features and way of life

Head of Tapinesthis inermis

Little is known about the biology of these six-eyed, 1 to 4 mm small haplogynous , ecribellate spiders . Their main area of ​​distribution is in the tropics. The species live in the litter of fallen leaves or under stones, where they feed on tiny animals that larger spiders are already ignoring. Many are bright orange and have hard plates on their abdomen; others are pale whitish or yellowish with softer abdomen.

Reproduction

Their reproductive strategy is different from that of other families. While many true spiders are R-strategists and produce many eggs, the Oonopidae only lay a few eggs in an egg sac. The European species Onoops pulcher lays only two eggs in a cocoon.

Systematics

The World Spider Catalog currently lists 113 genera and 1628 species for the dwarf six-eye spiders. (As of July 2016)

Web links

Commons : Dwarf six-eye spiders (Oonopidae)  - Collection of images, videos, and audio files

Oonopidae in the World Spider Catalog

literature

  • Gertsch, Willis J. 1979: American Spiders, 2nd edition. Van Nostrand Reinhold, New York. ISBN 0-442-22649-7
  • Hänggi, Ambros; Stöckli, Edi; Nentwig, Wolfgang, 1995. Habitat of Central European Spiders. Miscellanea Faunistica Helvetiae - Center suisse de cartographie de la faune, Neuchatel. ISBN 2-88414-008-5
  • Heimer, Stefan and Nentwig, Wolfgang; 1991: Spinning Central Europe. Publisher Paul Parey Berlin. ISBN 3-489-53534-0

Individual evidence

  1. ↑ a b Natural History Museum of the Burgergemeinde Bern: World Spider Catalog Version 17.5 - Oonopidae . Retrieved July 29, 2016.