Abstract:The tribe Riorajini is composed of four species, Rioraja agassizii, Atlantoraja castelnaui, A. cyclophora and A. platana, which are endemic to the inshore waters of the Southwestern Atlantic Ocean. Previous studies have hypothesized the monophyly of this group but interrelationships within its members remain not fully understood. In this study, we analysed quantitative as well as qualitative morphological characters related to external morphology, squamation, neurocranium, visceral arches, pectoral and pelvic … Show more
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