Recently published is:
REID, C.M., 2003. Permian
Bryozoa of Tasmania and New
South Wales: systematics and their use in Tasmanian
biostratigraphy. Memoirs of the Association
of Australasian Palaeontologists 28, 1-133. ISSN 0810-8889
Abstract
Permian Bryozoa from the glaciomarine Tasmania
and southern Sydney Basins,
Australia, are
reassessed following the taxonomy of Morozova (1974)
and Morozova & Lisitsyn
(1996). The fenestrate faunas are described using the descriptive parameters of
Snyder (1991). Previously the fenestrate faunas of these regions have not been
examined internally. This study shows that taxonomic methods involving internal
examination, applied to all bryozoan groups, yield the information required for
accurate biostratigraphic analysis.
The Permian bryozoan faunas of the Tasmania
Basin are abundant, but of low
diversity, with cosmopolitan genera and many endemic species. Taxa are mostly
Fenestrata and Trepostomata, with rare Cryptostomata and Cystoporata,
and range in age from Sakmarian to Kazanian. Thirty-six species are recorded in the genera Levifenestella, Rectifenestella, Mackinneyella, Parapolypora, Paucipora, Polypora, Polyporella, Pseudopolypora,
and Shulgapora
(Fenestrata); Dyscritella, Dyscritellina, Paralioclema, and Stenopora (Trepostomata);
Streblotrypa
(Cryptostomata); Fistuliporidae
(Cystoporata). Eighteen new species are described
from the Tasmania Basin:
Rectifenestella banksi, R. counselensis, R. smithae, R. tamarensis, Mackinneyella
granulosa, Parapolypora boraformis,
Paucipora tasmaniensis, Polyporella protuberans, P. rebarbensis,
P. subwoodsi, P. westarmensis,
Pseudopolypora versonoda, Dyscritella inversa, D. tunbridgensis,
Dyscritellina megacanthi, Paralioclema wassi, Stenopora aequalis and
S. berriedalensis.
The bryozoan fauna described here from the southern Sydney
Basin is largely confined to the
Kungurian Wandrawandian Siltstone, where abundant
well preserved faunas were collected. Sixteen species are recorded within the
genera Laxifenestella,
Levifenestella, Minilya, Rectifenestella, Fenestella, Paucipora,
Polypora, Shulgapora
(Fenestrata), and Dyscritella
and Stenopora
(Trepostomata), with four new species described
– Laxifenestella oviferosa, Paucipora ulladullaensis, Dyscritella espinensis and Stenopora seriatensis.
Within fenestrate faunas
of the Tasmania Basin,
internal examination has revealed a number of species and genera that were
previously grouped together as long-ranging species of variable mesh
dimensions. In the Tasmania Basin,
bryozoan Faunizones A-E are
proposed for the Sakmarian to the Kazanian,
that can aid in Australia-wide biostratigraphic relationships. The new bryozoan
faunizones are based on assemblages of new and
previously described taxa. The use of bryozoans in biostratigraphic analysis
can provide a means of correlating drill-core material where other macrofossils
may not be suitable.
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