New Zealand Journal of Marine and Freshwater Research abstracts
Revision of Southwest Pacific Polymastiidae
(Porifera: Demospongiae: Hadromerida) with descriptions
of new species of Polymastia Bowerbank, Tylexocladus Topsent,
and Acanthopolymastia gen. nov. from New Zealand
and the Norfolk Ridge, New Caledonia
MICHELLE KELLY-BORGES*
PATRICIA R. BERGQUIST
Marine Systematics Research Group
School of Biological Sciences
University of Auckland
Private Bag 92 019
Auckland, New Zealand
*Present address: Marine Research Group, Department of Civil and
Environmental Engineering, UNITEC Institute of Technology, Private Bag 92 025,
Auckland, New Zealand.
Abstract Specific diagnostic characters are reviewed and
redefined for the genus Polymastia in northern New Zealand waters, to
provide a framework for the recognition of new species, and for the revision
and redefinition of other Polymastiidae. Eight new species of Polymastia
are described, and Polymastia fusca Bergquist, P. hirsuta
Berquist, and P. cf. massilis Carter are redescribed in the
light of new material. Species of Polymastia which contain exotyles and
centrotylote oxea in addition to the usual megasclere complement, provided the
opportunity to redefine the polymastid genera Proteleia, and
Tylexocladus, which would typically have been reserved respectively, for
sponges with these spicules. A new species of Tylexocladus is described
from the Chatham Rise in southern New Zealand, providing a first record of the
genus from this location. A new genus Acanthopolymastia is established
for southern ocean Polymastiidae with acanthose centrotylote oxea, with
Atergia acanthoxa Koltun from Antarctica as the type species. Two
additional species from New Zealand and the Norfolk Ridge, New Caledonia are
described, and all are compared to Atlantic species of the same genera.
Suggestions for partitioning of shallow-water Polymastia species are put
forward.
Keywords Porifera; Demospongiae; Polymastiidae;
Polymastia; Acanthopolymastia; Tylexocladus; new species;
new genus; taxonomy; New Zealand; Norfolk Ridge; New Caledonia
New Zealand Journal of Marine and Freshwater Research, 1997, Vol. 31:
367-402
0028-8330/97/3103-0367 $7.00/0 (c) The Royal Society of New Zealand
1997
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