Diguetidae
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| FOP-Cambridge , 1899 |
The Diguetidae are a family of true spiders and comprise two genera with 13 species . (As of June 2016)
description
The family consists of ecribellate , haplogyne spiders. A special feature of these relatively primitive real spiders, which only occur in America, is the lack of the rear, second pair of respiratory organs . Only the anterior book lungs are present, while the posterior trachea are completely absent; only the furrows on the sides of the abdomen of their respiratory openings are still present.
Diguetidae have six eyes that are arranged in an almost straight line. The median eyes are completely regressed. The genus Segestrioides has long been considered one of the most enigmatic taxa in arachnology . After Alexander Keyserling found Segestrioides bicolor in the Andes, the only preparation was lost in the 1930s or 1940s. It was not until a targeted expedition in 1988 that animals were found again at the original site, on the basis of which the allocation of genus and family could be confirmed.
Gertsch assigned this family, which weaves both tubes and nets , to the superfamily of the plectruroidea ( primitive hunters and weavers). Their relatives differ from the other plectruroids in particular in the number and position of the eyes and the structure of the male palpus .
Systematics
The family name Diguetidae, nominated genus Diguetia Simon , 1895 , was coined by FO Pickard-Cambridge in 1899, but not adopted. The genus Diguetia , together with Periegops and Pertica ( synonym of Segestrioides ), was assigned to the Sicariidae . Willis John Gertsch's research (1949) resulted in an elevation of Diguetia to a family status , the family Diguetidae. His detailed study from 1958 allowed other researchers to identify additional species. Since the first and only finding of Segestrioides bicolor Keyserling disappeared in 1883 , the classification of Segestrioides and the family status of the Diguetidae could only be confirmed a century later.
The World Spider Catalog currently lists two genera and 13 species for the Diguetidae. (As of June 2016)
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Diguetia Simon , 1895
- Diguetia albolineata (O. Pickard-Cambridge , 1895)
- Diguetia andersoni Gertsch , 1958
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Diguetia canities (McCook , 1889)
- Diguetia canities canities (McCook , 1889)
- Diguetia canities dialectica Chamberlin , 1924
- Diguetia canities mulaiki Gertsch , 1958
- Diguetia catamarquensis (Mello-Leitão , 1941)
- Diguetia imperiosa Gertsch & Mulaik , 1940
- Diguetia mojavea Gertsch , 1958
- Diguetia propinqua (O. Pickard-Cambridge , 1896)
- Diguetia signata Gertsch , 1958
- Diguetia stridulans Chamberlin , 1924
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Segestrioides Keyserling , 1883
- Segestrioides badia (Simon , 1903)
- Segestrioides bicolor Keyserling , 1883
- Segestrioides copiapo Platnick , 1989
- Segestrioides tofo Platnick , 1989
Web links
Diguetidae in the World Spider Catalog
literature
- Gertsch, Willis J. 1979: American Spiders, 2nd edition. Van Nostrand Reinhold, New York. ISBN 0-442-22649-7
- Norman I. Platnick 1989: A Revision of the Spider Genus Segestrioides (Araneae, Diguetidae). American Museum Novitates. The American History Museum of Natural History (AMNH), New York, NY 10024 ISSN 0003-0082 ( PDF )
Individual evidence
- ↑ a b Natural History Museum of the Burgergemeinde Bern: World Spider Catalog Version 17.0 - Diguetidae . Retrieved June 6, 2016.