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Brief Summary

    Psechridae: Brief Summary
    provided by wikipedia

    The Psechridae are a family of spiders with about 50 species in two extant genera, recently revised by Bayer (2011, 2012).

    They belong to the RTA clade of spiders, spiders that all have a Retrolateral Tibial Apophysis on the male pedipalp. A recent phylogenetic analysis places Psechridae as close relatives of the Lynx spiders (Oxyopidae), as well as wolf spiders (Lycosidae) and nursery web spiders (Pisauridae) (Agnarsson et al. 2013). With body lengths of up to 2 cm and funnel webs more than 1 m in diameter, they are among the biggest cribellate spiders. Psechrids construct cribellate webs and Fecenia construct webs that are similar to orb webs of Orbiculariae spiders, a remarkable example of evolutionary convergence (Blackledge et al. 2012, Agnarsson et al. 2013). Psechridae spiders are only found in SE Asia, where they occur in forests from lowland to altitudes exceeding 2000 m. Female Psechrus carry their egg-sac in the chelicerae, similar to their relatives, the ecribellate Pisauridae. They feature several characteristics normally found in ecribellate spiders, for example brood care behavior, and a colulus with no apparent function (Fang et al. 2000).

Comprehensive Description

    Psechridae
    provided by wikipedia

    The Psechridae are a family of spiders with about 50 species in two extant genera, recently revised by Bayer (2011, 2012).

    They belong to the RTA clade of spiders, spiders that all have a Retrolateral Tibial Apophysis on the male pedipalp. A recent phylogenetic analysis places Psechridae as close relatives of the Lynx spiders (Oxyopidae), as well as wolf spiders (Lycosidae) and nursery web spiders (Pisauridae) (Agnarsson et al. 2013). With body lengths of up to 2 cm and funnel webs more than 1 m in diameter, they are among the biggest cribellate spiders. Psechrids construct cribellate webs and Fecenia construct webs that are similar to orb webs of Orbiculariae spiders, a remarkable example of evolutionary convergence (Blackledge et al. 2012, Agnarsson et al. 2013). Psechridae spiders are only found in SE Asia, where they occur in forests from lowland to altitudes exceeding 2000 m. Female Psechrus carry their egg-sac in the chelicerae, similar to their relatives, the ecribellate Pisauridae. They feature several characteristics normally found in ecribellate spiders, for example brood care behavior, and a colulus with no apparent function (Fang et al. 2000).

    Habits

    Psechridae occur in forests, rocky areas, and caves, constructing horizontal webs lace webs (Psechrus) or pseudo-orbs (Fecenia). They have greatly elongated legs, with the last element being very flexible.

    Distribution

    They occur in southeastern Asia, ranging from India in the west, to Solomon Islands in the east, reaching as far south as northern Australia, and north to central China.

    Genera

    See also

    References

    • Agnarsson, I., Gregorič, M., Blackledge, T.A., Kuntner, M. (2013) Phylogenetic placement of Psechridae and the convergent origin of orb-like spider webs. Journal of Zoological Systematics and Evolutionary Research 51: xxx-xxx
    • Bayer, S. (2011) Revision of the pseudo-orbweavers of the genus Fecenia Simon, 1887 (Araneae, Psechridae), with emphasis on their preepigyne. Zookeys 153:1–56.
    • Bayer, S. (2012) The lace-sheet-weavers—a long story (Araneae: Psechridae: Psechrus). Zootaxa 3379: 1–170
    • Blackledge, T.A., Kuntner, M., Agnarsson, I. (2012) Biomaterial evolution parallels behavioral innovation in the origin of orb-like spider webs. Scientific Reports 2: 833
    • Fang, K., Yang, C.-C., Lue, B.-W., Chen, S.H., Lue, K.-Y. (2000) Phylogenetic Corroboration of Superfamily Lycosoidae Spiders (Araneae) as Inferred from Partial Mitochondrial 12S and 16S Ribosomal DNA Sequences. Zoological Studies 39(2): 107-113. PDF
    • Wang, X.P. & Yin, C.M. (2001). A review of the Chinese Psechridae (Araneae). J. Arachnol. 29: 330-344. PDF
    • Willis J. Gertsch: American Spiders, 2nd edition., Van Nostrand Reinhold, New York 1979. .mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""'"'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}ISBN 0-442-22649-7
    • Platnick, Norman I. (2008): The world spider catalog, version 8.5. American Museum of Natural History.