Tetragnatha

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Tetragnatha
Temporal range: Palaeogene–present
Tetragnatha.extensa.female.jpg
female T. extensa
Scientific classification
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Tetragnatha

Latreille, 1804
Diversity
326 species

Tetragnatha is a genus of spiders containing hundreds of species. They are found all over the world, although most occur in the tropics and subtropics. They are commonly called stretch spiders, referring to their elongated body form. When disturbed they will stretch their front legs forward and the others in the other direction, thus being able to hide on blades of grass or similar elongated substrates. They are able to run over water.

The name Tetragnatha is derived from Greek, tetra- a numerical prefix referring to four and gnatha meaning "jaw".

One of the biggest and most common species is T. extensa, which has a holarctic distribution. It can be found near lakes, river banks or swamps.[1] Large numbers of individuals can often be found in reeds, tall grass or minor trees and shrubs.

A shift to cursorial behavior in the Hawaiian Tetragnatha species seems to have occurred very early on arrival of the ancestor on the island chain.[2]

Species[edit]

The genus contains the following species (and hundreds more):[3]

References[edit]

  1. ^ Hänggi, Ambros; Stöckli, Edi; Nentwig, Wolfgang (1995). Lebensräume Mitteleuropäischer Spinnen. Miscellanea Faunistica Helvetiae – Centre suisse de cartographie de la faune, Neuchatel. ISBN 2-88414-008-5.
  2. ^ Gillespie, R.G.; Croom, H.B.; Palumbi, S.R. (1994). "Multiple origins of a spider radiation in Hawaii". Proceedings of the National Academy of Sciences. 91 (6): 2290–2294. doi:10.1073/pnas.91.6.2290. PMC 43356. PMID 8134390.
  3. ^ World Spider Catalog (2018). "Tetragnatha". Natural History Museum of Bern.

Media related to Tetragnatha at Wikimedia Commons Data related to Tetragnatha at Wikispecies