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THE GENUS OMOPHRON LATREILLE (COLEOPTERA: CARABIDAE): REDESCRIPTION OF THE LARVAL STAGE AND PHYLOGENETIC CONSIDERATIONS

Published online by Cambridge University Press:  31 May 2012

Jean-François Landry  and
Yves Bousquet
Jean-François Landry
Affiliation:
Biosystematics Research Institute, Agriculture Canada, OttawaK1A 0C6
Yves Bousquet
Affiliation:
Biosystematics Research Institute, Agriculture Canada, OttawaK1A 0C6
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Abstract

A revised generic description of the three larval instars of Omophron is presented. Hypothetical apotypic character states of the genus are: bidentate retinaculum; lacinia subequal in length to galea and apically subspatulate; ligula as long as labial palp; pore LAa located on ligula and seta LA6 on basal third of ligula; setae TI2* and TI7* of middle and hind tibiae located basally; setae UN1 and UN2 flat and about 1.5 times the length of claws; presence of serially paired gland-like structures on abdominal pleura I–VII; hypopleurites not apparent in first instar; apex of urogomphi extended as a small hyaline appendix in first instar; setae PY1, PY2, and PY6 on the pygidium absent. Most of these character states are autapotypic, and no synapotypies were found to indicate a sister group to Omophron.

Résumé

Une description générique revue des trois stades larvaires d'Omophron est présentée. Les caractères apotypiques de la larve sont : rétinaculum bidenté; lacinie subégale en longueur au galéa et apicalement subspatulée; ligule aussi longue que le palpe labial; pore LAa situé sur la ligule et soie LA6 sur le tiers basal de la ligule; soies TI2* et TI7* des tibias médians et postérieurs basales; soies UN1 et UN2 plates et environ 1.5 fois la longueur des ongles; présence de structures pairées ressemblant à des glandes sur les pleures abdominaux I–VII; hypopleurites non apparents au premier stade; apex des urogomphes prolongé en un petit appendice hyalin au premier stade; soies PY1, PY2 et PY6 sur le pygidium absentes. La plupart de ces caractères sont autapotypiques et aucune synapotypie n'a pu être identifiée qui pourrait indiquer le taxon-frère d'Omophron.

Type
Articles
Information
The Canadian Entomologist , Volume 116 , Issue 11 , November 1984 , pp. 1557 - 1569
Copyright
Copyright © Entomological Society of Canada 1984

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