New Zealand Journal of Marine and Freshwater Research abstracts
First record of Centrophorus harrissoni from New Zealand, with observations
on squamation in Centrophoridae (Squaliformes)
Clinton A. J. Duffy
Department of Conservation
Private Bag 68908 Newton
Auckland, New Zealand
email: cduffy@doc.govt.nz
Abstract Three specimens of Centrophorus from the
southern Norfolk Ridge, Three Kings Ridge, and Kermadec Ridge are provisionally
identified as C. harrissoni,extending the species’ known range
east to 178°52.1¢W.
Although apparently rare, C. harrissoni is widely distributed in southern
Australian waters and the southwest Pacific between 17°S and 43°S,
occurring on continental and insular slopes and oceanic ridges from 450 to
1048 m
depth. Differences in dental morphology between juvenile male and female type
specimens, a juvenile male from southern Norfolk Ridge and an adult male from
the Kermadec Ridge were tentatively attributed to sexual dimorphism. However,
additional specimens and research are required to confirm the identity of nominal C.
harrissoni from Norfolk Ridge and northern New Zealand. Eight Centrophorus spp.,
including C. harrissoni,and three Deania spp. were found to differ
from C. squamosus in having an area of transverse dermal folds on the
ventral surface of the head between the gills. In C. harrissoni and Deania spp.
these are naked except for a row of denticles along the top of each fold. In C.
harrissoni these denticles are minute and thorn-like, whereas in Deania spp.
they have tridentate crowns on short, straight pedicles.
Keywords gulper shark; new record; range extension; morphology;
sexual dimorphism
New Zealand Journal of Marine and Freshwater Research, 2007, Vol. 41:
163–173
0028–8330/07/4102–0163 © The Royal Society
of New Zealand 2007
M06043; Online publication date 22 May 2007. Received 12 July 2006;
accepted 22 December 2006
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