New Zealand Journal of Geology and Geophysics abstracts
Gastropod predation patterns in Pliocene and Recent pectinid bivalves from
Antarctica and New Zealand
H. A. JONKERS
British Antarctic Survey
Natural Environment Research Council
High Cross, Madingley Road
Cambridge CB3 0ET, United Kingdom
email: H.A.Jonkers@bas.ac.uk
Abstract Boreholes in the large, extinct Antarctic Neogene
pectinid Zygochlamys anderssoni suggest that this scallop was preyed
upon by a large predatory muricid gastropod (possibly a Trophon
species). The holes occur in mature individuals, which contrasts with the
situation in modern Zygochlamys delicatula from New Zealand, where
gastropod predation is apparently restricted to juveniles only. This difference
is ascribed to dissimilarities in the lifestyles of these scallops; whereas the
former was probably byssally attached throughout ontogeny, adults of the latter
become free living after an initial period of byssal attachment. During the
late Pliocene, a change towards higher motility in Chlamys-like
pectinids of the Southern Ocean may have caused the loss of an important food
source for the larger muricids.
Keywords Antarctica; New Zealand; gastropod predation;
Pectinidae; Muricidae
New Zealand Journal of Geology & Geophysics, 2000, Vol. 43:
247-254
0028-8306/00/4302-0247 $7.00/0 (c) The Royal Society of New Zealand
2000
PDF file of entire paper: medium quality (1620K); (scanned from paper original: notes about this process)
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