Resumen

Taxonomic and nomenclatorial revision within the Neotropical genera of the subtribe Odontocheilina W. Horn in a new sense ñ 14. Pentacomia (Pentacomia) chrysammoides sp.nov., a new species related to P. (P.) chrysamma. (Coleoptera: Cicindelidae). Acta Musei Moraviae, Scientiae biologicae (Brno) 100(2): 217ñ249. ñ Pentacomia (Pentacomia) chrysammoides sp.nov. is described as new to science from Bolivia. The new species is closely related to P. (P.) chrysamma Bates, 1872 (the type species of the genus Pentacomia Bates, 1872), originally described from Ecuador and commonly considered widespread in the Amazon Basin. After an examination of hundreds of specimens of a great number of populations, the occurrence of the genuine P. (P.) chrysamma with characters comparable with type specimens has been confirmed with certainty in Ecuador and partly in northern and interior Peru, while some populations in central and southern Peru (very rarely also in northern Bolivia) possess inconsistent internal characters. It has appeared that apart from a certain variability, P. (P.) chrysamma exhibits some dimorphism between separated and probably vicariant populations; presumably, their adaptation to different biotopes or under different environmental conditions may result in allopatric, parapatric and sympatric speciation of genetically distinct sister species. The new species described here, despite certain variability, differs from P. (P.) chrysamma in several, both external and internal, diagnostic characters.