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Gisbornian (Caradoc) graptolites from New South Wales, Australia: systematics, biostratigraphy and evolution

✍ Scribed by Barrie Rickards; Lawrence Sherwin; Penelope Williamson

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 692 KB
Volume: 36
Category: Article
ISSN: 0072-1050
DOI: 10.1002/gj.876

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✦ Synopsis

Abstract

The biodiversity record of graptolites from the Cheeseman's Creek Formation, considered herein as late Gisbornian (Caradoc) in age, has been substantially increased to fifteen taxa, including the new species Dicellograptus praemorrisi sp. nov. and Climacograptus vandenbergi sp. nov. Some of the records have global correlative significance enabling us to identify the wilsoni Biozone ( = calcaratus Biozone of eastern Australia). Several evolutionary lineages have been recognized:

Dicellograptus moffatensis (Carruthers, 1858) → D. praemorrisi sp. nov → D. morrisi Hopkinson, 1871

Glossograptus hincksi Hopkinson, 1872 → Glossograptus? sp.

Climacograptus bicornis (J. Hall, 1847) → C. vandenbergi sp. nov. → C. lanceolatus VandenBerg, 1990.

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