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REVIEW OF THE MYRMECOPHILOUS PTOMAPHAGUS, SUBGENUS ECHINOCOLEUS (NEW STATUS), OF NORTH AMERICA (COLEOPTERA: LEIODIDAE: CHOLEVINAE: PTOMAPHAGINI)

Published online by Cambridge University Press:  31 May 2012

Stewart B. Peck  and
Pedro Gnaspini
Stewart B. Peck
Affiliation:
Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
Pedro Gnaspini
Affiliation:
Departamento de Zoologia, Institute de Biociências, Universidade de São Paulo, Caixa Postal 11294, 05422-970, São Paulo, SP, Brasil
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Abstract

We here give Echinocoleus new ranking as a subgenus of Ptomaphagus. Ptomaphagus (Echinocoleus) acutus sp.nov. is described from the southeastern United States (Alabama, Georgia, Florida). It is the most plesiotypic member of a group in which all other species live in the western United States and (probably) adjacent Mexico. All are myrmecophilous with Pogonomyrmex and Aphaenogaster (= Novomessor) harvester ants. A phylogenetic analysis is given for the subgenus. The main synapomorphies of Echinocoleus, which are mostly interrelated with myrmecophily, are reduction of body length and broadening of elytra, reduction of antennal length, verticalization of mesocoxal insertion, reduction of mesosternal carina, body with a golden pubescense, and a pointed projection at the end of the spermatheca.

Résumé

Nous donnons ici à Echinocoleus le statut de sous-genre du genre Ptomaphagus. Une nouvelle espèce, Ptomaphagus (Echinocoleus) acutus, découverte dans le sud-est des États-Unis (Alabama, Georgie, Floride) est décrite. Il s’agit là du membre le plus plésiotypique du groupe dont toutes les autres espèces vivent dans l’ouest des États-Unis et (probablement) dans la partie adjacente du Mexique. Toutes sont myrmécophiles et vivent chez des fourmis moissonneuses Pogonomyrmex et chez Aphaenogaster (= Novomessor). Une analyse phylogénétique du sous-genre est proposée. Les principales synapomorphies rencontrées chez Echinocoleus sont reliées à la myrmécophilie : la réduction de la longueur du corps et l’élargissement des élytres, la réduction de la longueur des antennes, la verticalisation de l’insertion mésocoxale, la réduction de la carène mésosternale, la pubescence dorée sur le corps, la présence d’une projection en pointe à l’extrémité de la spermathèque.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 129 , Issue 1 , February 1997 , pp. 93 - 104
Copyright
Copyright © Entomological Society of Canada 1997

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