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A revision of the tranquillus and speciosus groups of the spider genus Trachelas (Araneae, Clubionidae) in North and Central America. American Museum novitates ; no. 2553

Show simple item record Platnick, Norman I. en_US Shadab, Mohammad Umar. en_US 2005-10-06T18:21:12Z 2005-10-06T18:21:12Z 1974 en_US
dc.description 34 p. : ill., maps ; 26 cm. en_US
dc.description Includes bibliographical references (p. 34). en_US
dc.description.abstract "The tranquillus and speciosus groups of Trachelas, and the 20 species from North and Central America placed in them, are diagnosed and described. In both groups the male embolus is a separate sclerite and the internal female genitalia have anteriorly folded lateral ducts. As defined, the tranquillus group includes those species in which the male embolus has a coiled base and the internal female genitalia have large, regularly coiled median ducts, whereas the speciosus group contains those species whose males lack a coiled embolar base and whose females have small, irregularly coiled median ducts. Keys to the species, illustrations and scanning electron micrographs of somatic and genitalic characters, locality lists, maps, and notes on natural history are provided. The affinities of the genus and its species groups, the associations of these spiders with man, the relative abundance of teratological specimens, difficulties in matching sexes, problems in nomenclature, and the use of leg cusps as a taxonomic character are discussed. Seven new species are described; depressus from southern mexico, organatus from Arizona and western Mexico, spicus from Chiapas, sinuosus from Georgia and Florida, fuscus from Durango and Nuevo León, latus from southern Mexico and Guatemala, and hamatus from Veracruz. The female of spirifer F.O.P.-Cambridge and the male of huachucanus Gertsch are described for the first time. Four specific names are newly synonymized: uthanus Chamberlin and Ivie and arizonatus Gertsch, both with mexicanus Banks; laticeps Bryant with similis F.O.P.-Cambridge; and morosus banks with transversus F.O.P.-Cambridge"--P. 3. en_US
dc.format.extent 9254785 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, N.Y. : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 2553 en_US
dc.subject.lcc QL1 .A436 no.2553, 1974 en_US
dc.subject.lcsh Trachelas en_US
dc.subject.lcsh Spiders -- North America en_US
dc.subject.lcsh Spiders -- Central America en_US
dc.subject.lcsh Arachnida -- North America en_US
dc.subject.lcsh Arachnida -- Central America en_US
dc.title A revision of the tranquillus and speciosus groups of the spider genus Trachelas (Araneae, Clubionidae) in North and Central America. American Museum novitates ; no. 2553 en_US
dc.type text en_US

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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