The vicariant Typhlocharis from Gibraltar Strait. I: Typhlocharis armata Coiffait, 1969 (Coleoptera, Caraboidea, Trechidae)
DOI:
https://doi.org/10.3989/graellsia.2010.v66.021Keywords:
Coleoptera, Caraboidea, Anillini, Typhlocharis, Spain, MoroccoAbstract
This first part about the vicariant Typhlocharis from Gibraltar Strait is dedicated to Typhlocharis armata Coiffait, 1969; a second paper will cover T. silvanoides Dieck, 1869. The studied material was obtained in four field campaigns carried out in the south of Spain and north of Morocco between 1997 and 2001 (Zaballos & Banda, 2000; Zaballos, 2005). In these campaigns abundant specimens of Typhlocharis (Coleoptera, Caraboidea, Trechidae) were collected in different localities, the majority of them belonging to the species T. armata Coiffait, 1969. Their study and the comparison with the type series of this species allowed its complete redescription and clarification of its status within the genus. Contrary to what has been considered traditionally, the marginal umbilicate series of elytra in T. armata is composed of three, instead of four posterior setae. The taxonomical affinities of this species are established, the morphological weight of the umbilicate group of elytral setae as a lineage and species group defining character is discussed, and the theory of Jeanne (1973) about the relation between shortening of elytra and umbilicate series reduction with a decrease in body size is revised. The dispersal abilities are evaluated and a biogeographical explanation for the new distribution of the species is proposed.
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