Tube-dwelling spider


Tube-dwelling spider

Taxobox
name = Tube-dwelling spiders


image_caption = "Segestria florentina"
image_width = 250px
regnum = Animalia
phylum = Arthropoda
classis = Arachnida
ordo = Araneae
superfamilia = Dysderoidea
familia = Segestriidae
familia_authority = Simon, 1893
diversity_link = List of Segestriidae species
diversity = 3 genera, 106 species
range_



range_map_width = 250px
subdivision_ranks = Genera
subdivision = "Ariadna"
"Gippsicola"
"Segestria"
The tube-dwelling spiders (family "Segestriidae") consist of two large and widespread genera ("Segestria" and "Ariadna") and one monotypic genus ("Gippsicola" from Australia). The family is easily recognized because its members have six eyes (most spiders have eight) arranged in a semicircle and have the first three pairs of legs arranged forward (most spiders have only the first two pairs so arranged.) The leg structure appears to be an adaptation for living in silken tubes, which unlike those of the atypical tarantulas, may branch and are often built in tree bark fissures, as well as under stones. These are haplogyne primitive araneomorphs related to the Dysderidae. Both "Segestria" and "Ariadna" are known from North America, South America, Eurasia, Africa and New Zealand, while "Ariadna" is also known from Australia. This wide distribution attests to the ancient origin of this family.

Genera

* "Ariadna" Audouin, 1826 (84 species; America, Africa, Asia, Australia)
* "Gippsicola" Hogg, 1900 (1 species; Australia)
* "Segestria" Latreille, 1804 (20 species; Palearctic, Americas, New Zealand, Central Asia)

ee also

* Spider families


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