New Zealand Journal of Geology and Geophysics abstracts
The bivalve Ambonychia in the Ordovician of New Zealand
MICHAEL K. EAGLE
Marine Invertebrates Department
Auckland Museum
Private Bag 92 018
Auckland, New Zealand
Abstract A new bivalve species, Ambonychia hailesensis
(Ambonychiacea: Ambonychiidae), is described from a boulder of
Arthur Marble (Late Ordovician), Hailes Knob, northwest Nelson, South Island,
New Zealand. The species is the first record of an Ordovician bivalve from New
Zealand and the only confirmed Ambonychia presently known from
Australasia. The occurrence of Ambonychia in Gondwanaland shelf seas may
be explained by oceanic migration. It is suggested that although morphological
affinities exist with North American and European specimens, specific
differences in the New Zealand species probably resulted from isolation and
consequental divergent evolution.
Keywords Mollusca; Bivalvia; Ambonychiidae; new
species; Ambonychia; Late Ordovician; Ashgillian; Arthur Marble; New
Zealand
New Zealand Journal of Geology & Geophysics, 1999, Vol. 42:
557-564
0028-8306/99/4204-0557 $7.00/0 (c) The Royal Society of New Zealand
1999
PDF file of entire paper: medium quality (3845K); (scanned from paper original: notes about this process)
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