INVESTIGADORES
MABRAGAÑA Ezequiel
artículos
Título:
Bathyraja cousseauae sp. n.: A New Softnose Skate from the Southwestern Atlantic (Rajiformes, Rajidae)
Autor/es:
DÍAZ DE ASTARLOA, J. M; MABRAGAÑA, E.
Revista:
COPEIA
Referencias:
Año: 2004 vol. 2 p. 326 - 335
ISSN:
0045-8511
Resumen:
A new species of softnose skate, Bathyraja cousseauae, is described from two adult
and 19 juvenile specimens collected from different localities of the southwestern
Atlantic. Bathyraja cousseauae is distinguished from all other southwestern Atlantic
softnose skate species by its color pattern, squamation pattern of dorsal surface,
lack of interspace between dorsal fins, and clasper morphology. The new species
has a round pale area ocellus-like, margined with dark brown on posterior part of
each pectoral base of dorsal surface, paler and dark spots over the disk, a continuous
row of 2127 median thorns from nuchal region to first dorsal fin and upper
side of disc densely covered with dermal denticles. Males have rod-shaped claspers
not expanded at proximal section of glans as it does in Bathyraja brachyurops. Besides
the external morphological features, skeletal characteristics (neurocranium,
scapulocoracoids, and claspers) are also described and illustrated here.