Amblyraja frerichsi

(KREFFT, 1968)


Thickbody skate
Classification: Elasmobranchii Rajiformes Rajidae

Reference of the original description
KREFFT, G. (1968)
Neue and erstmalig nachgewiesene Knorpelfische aus dem Archibenthal des Südwestantlantiks, einschließlich einer Diskussion einiger Etmopterus-Arten südlicher Meere. Archiv für Fischereiwissenschaft, 19 (1): 42 p.

Image of the original description
Image in copyright.

Synonyms / new combinations and misspellings
Raja frerichsi, Raja (Amblyraja) frerichsi



Description:


Citation: Amblyraja frerichsi (KREFFT, 1968): In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 07/2014

Please send your images of "Amblyraja frerichsi" to info@shark-references.com

Amblyraja frerichsi (KREFFT, 1968), adult male of Amblyraja frerichsi (1051 mm TL) in dorsal (A) and ventral (B) views, © Carlos Bustamante, Queensland, Australia

Common names
spa Raya, eng Ray, eng Thickbody skate

Short Description
Disc quadrangular; Anterior margin of disc concave behind head, convex at eye level and concave at spiracle level; Mouth slightly arched in subadult males and females, curved in adult males; Teeth with a flat oval base and acute single cusp, arranged in quincunx without sexual dimorphism; Strong tail broad, depressed, tapers from broad base to first dorsal fin; tail moderately long; Dorsal fins strongly acute with long bases and similar shape; Colour: Dorsal disc of fresh adult and subadult male is dark-brown except blackish-brown distal edges, pelvic fins, tail, dorsal and caudal fins. Ventral surface uniformly dark-brown, Dorsal colouration of female is greyish-brown; disc margins, scapulae and pelvic fins darker. Tail, dorsal and caudal fins are blackish-brown [15991]

Distribution
Southeast Pacific: Chile [16049]. Southwest Atlantic: off the mouth of Río de la Plata, Argentina [785] and Uruguay [5839].

Biology
Oviparous, paired eggs are laid. Embryos feed solely on yolk [733]. Eggs have horn-like projections on the shell [17086].

Size / Weight / Age
size from 404 to 1762 mm TL, the size at birth seems to be about 216 mm TL, immature specimens range from 216 to 817 mm TL, adult females (mature or egg-bearing) ranged from 965 to 1731 mm TL, maturity is attained between 775 and 907 mm LT, no apparent sexual dimorphism were observed in size and disc shape [15991]

Habitat
bathydemersal; marine; depth range 600 - 2.609 m [15991]

Dentition
tooth count in upper jaw 36 (42) arranged in four rows and in lower jaw 37 (40) arranged in five rows [15991]