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Systematics and ecology of Anachipteria geminus sp. nov. (Acari: Oribatida: Achipteriidae) from arboreal lichens in western North America

Published online by Cambridge University Press:  02 April 2012

Zoë Lindo ,
Marilyn Clayton  and
Valerie M. Behan-Pelletier
Zoë Lindo*
Affiliation:
Department of Biology, University of Victoria, P.O. Box 3020, Station CSC, Victoria, British Columbia, Canada V8W 3N5
Marilyn Clayton
Affiliation:
Forest Biodiversity Network, Pacific Forestry Centre, Canadian Forest Service, Natural Resources Canada, Victoria, British Columbia, Canada V8Z 1M5
Valerie M. Behan-Pelletier
Affiliation:
Biodiversity Program, Research Branch, Agriculture and Agri-Food Canada, K.W. Neatby Building, Ottawa, Ontario, Canada K1A 0C6
*
1Corresponding author (e-mail: [email protected]).
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Abstract

We present the systematics and ecology of a new species of arboreal oribatid mite in the family Achipteriidae, Anachipteria geminussp. nov., a dominant arthropod in canopy lichens associated with western hemlock (Tsuga heterophylla (Raf.) Sarg. (Pinaceae)) and Pacific silver fir (Abies amabilis (Dougl. ex Loud.) Dougl. ex Forbes (Pinaceae)) in the coniferous temperate and montane forests of the Pacific Northwest of North America. The species is described on the basis of the morphology of all active instars plus molecular sequence data for the D3 region of the 28s rRNA (D3-28s) and mitochondrial cytochrome oxidase 1 (CO1) genes. Anachipteria geminus is the dominant oribatid mite in foliose lichens in the upper canopies of Pacific montane conifer trees. Specimens were found in 100% of canopy lichens sampled, and abundances can reach 1450 individuals / 100 g dry mass of lichen. Analysis of the population structure indicates that A. geminus has seasonally stable populations consistent with overlapping generations. Anachipteria geminus expresses morphological character states that require expanding the diagnoses of the genus Anachipteria and the family Achipteriidae. A revised diagnosis and morphological key to species of Anachipteria in Canada are given.

Résumé

Nous présentons la systématique et l’écologie d’une nouvelle espèce d’oribatide arboricole dans la famille Achipteriidae, Anachipteria geminussp. nov., un arthropode dominant dans les lichens de la canopée associés à la pruche de l’ouest (Tsuga heterophylla (Raf.) Sarg. (Pinaceae)) et au sapin gracieux (Abies amabilis (Dougl. ex Loud.) Dougl. ex Forbes (Pinaceae)) dans les forêts de conifères tempérées de montagne du Pacifique au Nord-ouest de l’Amérique du Nord. L’espèce est décrite sur la base de la morphologie de toutes les stades actifs, plus les données d’ordre moléculaires pour la région D3 de 28 rRNA (D3-28) et mitochondrial cytochrome oxidase 1 (CO1). Anachipteria geminus est l’oribatide dominant dans les lichens foliose des canopées supérieures des conifères de montagne du Pacifique au Nord-ouest. Les exemplaires ont été trouvés dans 100 % des lichens des canopées échantillonnés et la densité peut atteindre 1450 individus / 100 g de masse sec du lichen. L’analyse de la structure démographique indique que A. geminus a des populations saisonnièrement stables en accord avec les générations chevauchantes. Anachipteria geminus exprime des états de caractères morphologiques qui exigent le développement de les diagnostiques du genre Anachipteria et de la famille Achipteriidae. Une diagnostique révisée et une clé morphologique aux espèces d’Anachipteria au Canada sont données.

Type
Articles
Information
The Canadian Entomologist , Volume 140 , Issue 5 , October 2008 , pp. 539 - 556
Copyright
Copyright © Entomological Society of Canada 2008

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