Eur. J. Entomol. 101 (4): 591-608, 2004 | DOI: 10.14411/eje.2004.083

Systematic revision and cladistic analysis of the Patagonian genus Platesthes (Coleoptera: Tenebrionidae)

Gustavo E. FLORES
Laboratorio de Entomología, Instituto Argentino de Investigaciones de las Zonas Áridas (IADIZA, CRICYT), Casilla de Correo 507,

The genus Platesthes Waterhouse, 1845 (Pimeliinae: Praocini), distributed in the Patagonian steppes in southern Argentina and Chile, is revised. A phylogeny of its 13 species is proposed, based on 48 morphological characters. The cladistic analysis provides one most parsimonious cladogram showing that three unambiguous synapomorphic characters of external morphology and male genitalia support the monophyly of Platesthes. This article includes a redescription of the genus, redescriptions of its species, an identification key, habitus photographs of the most representative species, illustrations of external morphology, genital features and metendosternites, a cladogram and distribution maps. A discussion of the biogeography and status of conservation of Platesthes in the Patagonian steppes and in Central Chile is presented. A new Platesthes species is described: P. neuquensis sp. n. and P. hirtipes Kulzer, 1962 stat. n. is elevated to species status. Other valid species of the genus are: P. depressa (Guérin-Ménéville, 1841), P. similis Kulzer, 1956, P. unicosta Kulzer, 1956, P. nigra Kulzer, 1956, P. pilosa Kulzer, 1956, P. vidali Peña, 1986, P. burmeisteri Haag-Rutenberg, 1877, P. granulipennis Kulzer, 1956, P. kuscheli Kulzer, 1958, P. humeralis Kulzer, 1958 and P. silphoides Waterhouse, 1845 (type species), for which a lectotype is designated.

Keywords: Coleoptera, Tenebrionidae, Pimeliinae, Praocini, Platesthes, South America, Patagonian steppes, distribution, biology

Received: August 28, 2003; Revised: January 12, 2004; Accepted: April 5, 2004; Published: December 20, 2004  Show citation

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FLORES, G.E. (2004). Systematic revision and cladistic analysis of the Patagonian genus Platesthes (Coleoptera: Tenebrionidae). EJE, 101(4), 591-608. doi: 10.14411/eje.2004.083
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