Gyrinus (Neogyrinus) crassus Aubé, 1838

Gustafson, Grey T. & Short, Andrew E. Z., 2017, Review of the whirligig beetle genus Gyrinus of Venezuela (Coleoptera: Gyrinidae), Acta Entomologica Musei Nationalis Pragae 57 (2), pp. 479-520 : 518

Gyrinus (Neogyrinus) crassus Aubé, 1838

Some of the historical specimens from the BMNH Venezuelan material included a single female previously determined to be G. crassus Aubé, 1838 with the locality of ‘Venezuela’. We confirm the identification of the specimen as G. crassus . For much of this species’ history, it was known from sparse historical material without specific locality information ( OCHS 1960). Later, more material with improved locality data revealed it to be a southern Brazilian species, known from the states of Rio de Janerio, São Paulo, and Santa Catarina ( OCHS 1960, 1963a). Given the improved knowledge of this species’ distribution, andnot havingrecollected it during the survey, we consider this locality information to be in error, and G. crassus does not occur in Venezuela or northern South America.