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Variation in barbels of rhinichthys cataractae pisces cyprinidae in southeastern new york usa with comments on phylogeny and functional morphology


Variation in barbels of rhinichthys cataractae pisces cyprinidae in southeastern new york usa with comments on phylogeny and functional morphology



Journal of Freshwater Ecology 2(3): 239-246



ISSN/ISBN: 0270-5060

Large variation in presence and size of barbels and development of barbel papillae in longnose dace (Rhinichthys cataractae) is described. Larger dace seemed to have larger barbels and more papillae but the correlation coefficients for these relationships are low. Barbels are not recommended as a character for defining North American minnow genera and should be used with caution in defining species. In longnose dace, the location, morphology and variation of barbels suggest they do not function as contact taste organs. Alternative functions like orientation towards a food source or intraspecific communication are more compatable with the observed variation. Barbels are not necessarily all homologous and, in the absence of direct evidence, could equally be considered as either an apomorphic (derived) or a pleisiomorphic (primitive) character.

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Accession: 006892457

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Variation in barbels of Rhinichthys cataractae (Pisces: Cyprinidae) in southeastern New York with comments on phylogeny and functional morphology. Journal of Freshwater Ecology 23: 239-246, 1983

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