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RESEARCH ARTICLE
Contents Vol 20(5)

Taxonomic revision and cladistic analysis of Teratopactus Heller (Coleoptera : Curculionidae)

M. Guadalupe del Río A , Analía A. Lanteri A C and Jerson V. C. Guedes B
+ Author Affiliations
- Author Affiliations

A División Entomología, Museo de La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentina.

B Laboratorio de Manejo Integrado, Universidade Federal de Santa María, RS, Brazil.

C Corresponding author. Email: alanteri@fcnym.unlp.edu.ar

Invertebrate Systematics 20(5) 585-602 https://doi.org/10.1071/IS05047
Submitted: 12 October 2005  Accepted: 14 August 2006   Published: 12 October 2006

Abstract

Teratopactus Heller (Entiminae : Naupactini) is a broad-nosed weevil genus widespread in South America. This first taxonomic revision of the genus includes seven species: T. capucinus (Perty) (type species; syn. T. senex (Boheman)); T. elegans (Lucas), comb.nov.; T. gibbicollis (Boheman); T. nodicollis (Boheman) (syn. T. angulicollis (Lucas), T. paulanus (Fonseca & Autuori), T. serripes (Boheman), and T. perpastus (Boheman), syn. nov.); T. retusus (Boheman); T. tuberculatus (Arrow); and T. vittatus (Mannerheim), comb.nov. All species except T. tuberculatus have a strong ovipositor lacking styli, T. elegans, T. nodicollis and T. vittatus show well developed humeri bearing a strong tooth and T. retusus, T. capucinus and T. gibbicollis are characterised by a strongly gibbous pronotum and reduced humeri. Teratopactus nodicollis is the most variable and widespread species (Argentina, Brazil, Bolivia, Paraguay and Uruguay), T. tuberculatus and T. elegans range through Brazil and Paraguay and the remaining species are endemic to Brazil. The first cladistic analysis of the genus Teratopactus plus two outgroups, using 36 morphological characters, established synapomorphies and revealed relationships between the species in a single cladogram with the following topology: (T. tuberculatus ((T. elegans (T. nodicollis– T. vittatus)) (T. retusus (T. capucinus–T. gibbicollis)))).

Additional keywords: cladistics, Naupactini, systematics, weevils.


Acknowledgments

We wish to express our appreciation to all the specialists and curators who lent us specimens for study and/or facilitated the examination of material in their care; to the specialist Juan José Morrone for the critical reading of the manuscript, to the anonymous referees and editors for improving this contribution and to the ‘Consejo Nacional de Investigaciones Científicas y Técnicas’ (CONICET), Argentina, for its continuous support.


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Appendix 1.  List of characters, character states and codes
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