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On an apparently specific type of abnormality in the white-spotted shovel-nose ray, Rhynchobatus djiddensis (Forskal)

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Relation http://eprints.cmfri.org.in/906/
 
Title On an apparently specific type of abnormality in the white-spotted shovel-nose ray, Rhynchobatus djiddensis (Forskal)
 
Creator Luther, G
 
Subject Soles
Biology
 
Description INSTANCES of abnormalities among sharks, rays and skates are well documented in
literature, but information as to the frequency of occurrence of each type of abnormality
is meagre. In this connection four male and one female juvenile specimens
of Rhynchobatus djiddensis (Forsk.) showing almost identical type of deviation from
the normal ones have been examined by the author from collections made at different
places along the Palk Bay recently. Similar abnormalities in other batoids have
been responsible for the creation of even new genera such as Cephaleutherus
Rafinesque, Propterygia Otto, and Hieroptera Fleming while Cephalopterus ehrenbergii
Day (not Muller and Henle) is a misnomer for a similar abnormal form of
Gymnura sp., as drawn attention to by Gill (1896), Gudger (1933) and Bigelow and
Schroeder (1953).
 
Publisher MBAI
 
Date 1961
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/906/1/Article_18.pdf
Luther, G (1961) On an apparently specific type of abnormality in the white-spotted shovel-nose ray, Rhynchobatus djiddensis (Forskal). Journal of the Marine Biological Association of India, 3 (1&2). pp. 198-203.