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REVISION OF THE SUBFAMILY HELOPHORINAE OF THE NEARCTIC REGION (COLEOPTERA: HYDROPHILIDAE)

Published online by Cambridge University Press:  31 May 2012

Aleš Smetana
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Abstract

A revision of the hydrophilid subfamily Helophorinae (Coleoptera), containing the single genus Helophorus Fabricius 1775, is presented, including an historical review, a discussion of diagnostic characters and techniques, and an attempt at a phylogenetic reconstruction of the major lineages of the Nearctic Helophorus.Forty-one species are recognized; 9 species and 1 subspecies are described as new.Atractohelophorus Kuweit 1886 is placed in synonymy with Rhopalelophorus Kuwert 1886, and Megahelophorus Kuwert 1886 with Helophorus Fabricius 1775. On the specific level H. ventralis Motschulsky 1860 and H. obsoletesulcatus Motschulsky 1860 are placed in synonymy with H. lineatus Say 1823.A neotype is designated for H. lineatus Say.Lectotypes are designated for H. oblongus LeC., H. fortis LeC., H. regularis Sharp, H. lacustris LeC., and H. alternatus LeC.The genus Helophorus is described and the nomenclatorial and taxpnomic problems surrounding it are discussed in detail. Keys to subgenera and species are provided. Each subgenus is described; each species is described and illustrated, all available bionomic and distributional data are presented, and distributional records are mapped.

Résumé

Ce travail constitue une révision taxonomique de la sous-famille Helophorinae (Coleoptera : Hydrophilidae), représentée par le seul genre Helophorus Fabricius 1775, et inclut une revue historique, une discussion des principaux caractères et techniques ainsi qu'une analyse des relations phylogénétiques entre les lignées principales des Helophorus néarctiques.

L'étude porte sur 41 espèces dont 9 espèces et 1 sous-espèce représentent des taxa nouveaux pour la science.

Atractohelophorus Kuwert 1886 est placé en synonymie avec Rhopalelophorus Kuwert 1886 et Megahelophorus Kuwert 1886 avec Helophorus Fabricius 1775. Au niveau spécifique, H. ventralis Motschulsky 1860 et H. obsoletesulcatus Motschulsky 1860 sont placés en synonymie avec H. lineatus Say 1823.

Un néotype est désigné pour H. lineatus Say.

Des lectotypes sont désignés pour H. oblongus LeC., H. fortis LeC., H. regularis Sharp, H. lacustris LeC. et H. alternatus LeC.

Le genre Helophorus est décrit et les problèmes taxonomiques et de nomenclature associés à celui-ci sont discutés en détail. Des tableaux de détermination des sous-genres et espèces sont inclus dans le travail. Enfin, chaque sous-genre est décrit, chaque espèce est décrite et illustrée, les données disponibles sur la biologie et la distribution sont mentionnées et la répartition géographique des espèces est illustrée sur des cartes.

Type
Research Article
Information
The Memoirs of the Entomological Society of Canada , Volume 117 , Supplement S131 , 1985 , pp. 3 - 154
Copyright
Copyright © Entomological Society of Canada 1985

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