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Zachvatkinibates (Acari: Oribatida: Mycobatidae) of North America, with descriptions of sexually dimorphic species

Published online by Cambridge University Press:  02 April 2012

Valerie M. Behan-Pelletier  and
Barbara Eamer
Valerie M. Behan-Pelletier*
Affiliation:
Biodiversity Program, ECORC, Research Branch, Agriculture and Agri-Food Canada, K.W. Neatby Building, Ottawa, Ontario, Canada K1A 0C6
Barbara Eamer
Affiliation:
Biodiversity Program, ECORC, Research Branch, Agriculture and Agri-Food Canada, K.W. Neatby Building, Ottawa, Ontario, Canada K1A 0C6
*
1 Corresponding author (e-mail: behanpv@agr.gc.ca).
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Abstract

The oribatid mite genus Zachvatkinibates, found in littoral, forest canopy, and forest litter habitats, includes some species showing distinct sexual dimorphism in the octotaxic system of dermal glands, and others lacking this dimorphism. Three new species in this genus are described on the basis of adults, each of which shows species-specific sexual dimorphism: Z. nortonisp. nov. and Z. schatzisp. nov. from beach debris in British Columbia, Canada, and Z. shaldybinaesp. nov. from the littoral in eastern and northeastern Canada. We discuss the association of sexual dimorphism with the littoral habitat of species in this genus and, more generally, the expression of sexually dimorphic porose areas in Ceratozetoidea. We revise the diagnosis for the genus Zachvatkinibates and present a revised key for adults of Zachvatkinibates species of North America north of Mexico.

Résumé

Le genre d'oribatide, Zachvatkinibates, trouvé dans le littoral, la canopée des forêts et les habitats litières des forêts, inclut quelque espèces montrant le dimorphisme sexuel distinct dans le système octotaxique d'aires poreuses, et les autres manquant ce dimorphisme. Trois nouvelles espèces sont proposées et décrites basée sur les adultes, chacun de qui montre dimorphisme sexuelle spécifique : Z. nortonisp. nov. et Z. schatzisp. nov. du débris de plage en Colombie Britannique, Canada, et Z. shaldybinaesp. nov. du littoral dans l'est et nord-est du Canada. Nous discutons l'association de dimorphisme sexuel avec l'habitat du littoral dans ce genre et, plus généralement, l'expression de dimorphisme sexuel dans le système octotaxique du Ceratozetoidea. Nous révisons la diagnose générique pour Zachvatkinibates et présentons une clé d'identification révisée pour les espèces nord-américaine.

Type
Articles
Information
The Canadian Entomologist , Volume 137 , Issue 6 , December 2005 , pp. 631 - 647
Copyright
Copyright © Entomological Society of Canada 2005

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