Saturday, July 29, 2017

[Ichthyology • 2017] Hyphessobrycon platyodus • A New Species (Teleostei: Characiformes) from the Rio Madeira Nasin, Brazil, with Comments on How Multicuspid Teeth Relate to Feeding Habits in Characidae


Hyphessobrycon platyodus
 Ohara, Abrahão & Espíndola, 2017 


Abstract

A new species of Hyphessobrycon is described from the Rio Juma, a tributary of the lower Rio Aripuanã–Rio Madeira basin, Amazonas, Brazil. Hyphessobrycon platyodus can be distinguished from its congeners by the: presence of an elongated dorsal fin in adult males, 25–28 branched anal-fin rays and absence of dark blotches from the dorsal fin and caudal peduncle. The presence of multicuspid teeth in species of Characidae and its relation with feeding habits are briefly commented on.

Key words: Amazon; endemism; Hyphessobrycon loweae-group; sexual dimorphism; tooth cusps.

Fig. 2. Hyphessobrycon platyodus, MZUSP 117607, male, paratype, immediately after capture. 

Etymology: The specific epithet platyodus derives from the Greek, platyflatodontooth, in allusion to the compressed teeth with many cusps, an unusual feature in Hyphessobrycon.

Distribution: Hyphessobrycon platyodus is known only from Rio Juma drainage, upstream of the Paredão Waterfall, a tributary of the Rio Aripuanã, Rio Madeira basin, Apuí, Amazonas, Brazil. 




W. M. Ohara, V. P. Abrahão and V. C. Espíndola. 2017. Hyphessobrycon platyodus (Teleostei: Characiformes), A New Species from the Rio Madeira Nasin, Brazil, with Comments on How Multicuspid Teeth Relate to Feeding Habits in Characidae.   Journal of Fish Biology. DOI:  10.1111/jfb.13383


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