A revision of the spider genera Haplodrassus and Orodrassus (Araneae, Gnaphosidae) in North America. American Museum novitates ; no. 2583

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New York, N.Y. : American Museum of Natural History
"The nine species of Haplodrassus and four species of Orodrassus known from North America are diagnosed and described. Relationships between European and American Haplodrassus are examined; one Holarctic species and three pairs of sister species separated by the Atlantic Ocean are recognized. Two new species are described: H. chamberlini from western North America and O. canadensis from the northern United States and Canada. Six specific names are newly synonymized: H. dystactus Chamberlin and Gertsch and Drassodes ferrum-equinum F.O.P.-Cambridge, both with H. signifer (C.L. Koch); H. admes Chamber and H. uncifer Chamberlin, both with H. bicornis (Emerton); H. utus Chamberlin and Ivie with H. eunis Chamberlin; and O. durranti Chamberlin with O. assimilis (Banks). The males of H. mimus Chamberlin, H. dixiensis Chamberlin and Woodbury, H. taibo (Chamberlin), and O. orites Chamberlin and Gertsch, and the female of H. maculatus (Banks) are described for the first time"--P. [1].
40 p. : ill., maps ; 26 cm.
Includes bibliographical references (p. 39-40).