Sistemática, historia natural y biogeografía del género Pitnus gorham, 1880 (Coleoptera, Ptinidae)

• Main Author: Bellés, Xavier
• Format: Article in Journal/Newspaper
• Language: Spanish
• Published: CSIC - Museo Nacional de Ciencias Naturales (MNCN) 1992
• Subjects: Coleoptera; Ptinidae; Ptinus; Nuevo taxon; New taxon; Galapagos; Gorham; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/10261/174380

[EN] The genus Pitnus Gorham, 1880 is revised and divided into two subgenera: Pitnus s. str. and Octopitnus subg. n. The subgenus Pitnus includes the following species and subspecies: Pitnus (P.) pygmaeus Gorham, 1880 (type species), P. (P.) pintae pintae (Franz, 1985), comb. n., P. (P.) pintae grandis ssp. n., P. (P.) falli sp. n., P. (P.) pacatus sp. n., P. (P.) parvus sp. n., P. (P.) galapagoensis galapagoensis (Franz, 1985), comb. n., P. (P.) galapagoensis lapidicola ssp. n., P. (P.) tucsonianus sp. n., P. (P.) huesanus Fisher, 1919. P. (P.) mexicanus sp. n., P. (P.) striatus sp. n., P. (P.) robustus sp. n., P. (P.) longicornis sp. n. and P. (P.) antillanus sp. n. These species are spread over continental Central America, Caribbean Islands and the Galapagos Archipelago. The subgenus Octopitnus includes the Australian species Pitnus (Octopitnus) australiae Lea, 1923. Most of these species have been collected on xerophilic plants in sandy areas near the sea. The peculiar disjunct distribution of the genus Pitnus (in and near Central America and in Australia) is postulated to be the vestige of a palaeoantarctic distribution (South America-Antarctica-Australia) in the late Cretaceous. The distribution and speciation of the genus in Central America and adjacent islands is explained on the basis of both vicariance and dispersal hypotheses, in view of plate tectonics events in this region from the Oligocene to Pleistocene. [ES] Se revisa el género Pitnus Gorham, 1880, dividiéndolo en dos subgéneros: Pitnus s. str. y Octopitnus subg. n. El subgénero Pitnus incluye las especies y subespecies siguientes: Pitnus (P.) pygmaeus Gorham, 1880 (especie tipo). P. (P.) pintae pintae (Franz. 1985), comb. n., P. (P.) pintae grandis ssp. n., P. (P.) falli sp. n., P. (P.) pacatus sp. n., P. (P.) parvus sp. n., P. (P.) galapagoensis galapagoensis (Franz, 1985), comb. n., P. (P.) galapagoensis lapidicola ssp. n., P. (P.) tucsonianus sp. n., P. (P.) huesanus Fisher, 1919, P. (P.) mexicanus sp. n., P. (P.) striatus sp. n., P. (P.) ...