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DESCRIPTION OF TWO NEW SPECIES OF PLATYHYDRACARUS GEN. NOV. FROM WESTERN NORTH AMERICA, WITH REMARKS ON CLASSIFICATION OF ATHIENEMANNIIDAE (ACARI: PARASITENGONA: ARRENUROIDEA)

Published online by Cambridge University Press:  31 May 2012

Ian M. Smith
Ian M. Smith
Affiliation:
Biosystematics Research Centre, Agriculture Canada, Research Branch, Central Experimental Farm, Ottawa, Ontario, Canada K1A 0C6
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Abstract

Larvae, deutonymphs, and male and female adults of Platyhydracarus juliani sp.nov., and adults of P. parvipalpis sp.nov., are described from rheocrenes and small streams in western North America. The genus Platyhydracarus gen.nov. is proposed and diagnosed, based primarily upon the presence of genital acetabula both in the gonopore and on acetabular plates flanking the gonopore, and of a group of thickened setae anterior to the gonopore, in male adults. Possible relationships between Platyhydracarus and other Athienemanniidae are discussed, and a new key to the genera of Athienemanniinae is presented.

Résumé

L’auteur décrit des larves, des deutonymphes et des adultes mâles et femelles de Platyhydracarus juliani, nouvelle espèce, et des adultes de P. parvipalpius, nouvelle espèce, provenant de rhéocrènes et de petits cours d’eau de l’ouest de l’Amérique du Nord. Il propose et diagnostique le genre Platyhydracarus, nouveau genre, principalement à cause de la présence d’acétabulums génitaux dans le gonopore et sur les plaques acétabulaires disposées près du gonopore, et d’un groupe de soies épaissies antérieures au gonopore, chez les adultes mâles. Il étudie les rapports possibles entre Platyhydracarus et d’autres Athienemanniidés et présente une nouvelle clef d’identification des genres d’Athienemanniinés.

Type
Articles
Information
The Canadian Entomologist , Volume 121 , Issue 8 , August 1989 , pp. 709 - 726
Copyright
Copyright © Entomological Society of Canada 1989

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