New phyllolepids (placoderm fishes) from the Middle-Late Devonian of southeastern Australia
- 27 June 2005
- journal article
- Published by Taylor & Francis in Journal of Vertebrate Paleontology
- Vol. 25 (2) , 261-273
Abstract
Phyllolepid placoderms from the Devonian Boyd Volcanic Complex on the south coast of New South Wales are described as Cobandrahlepis petyrwardi, gen. et sp. nov., and Yurammia browni, gen. et sp. nov. Both are more primitive than other described phyllolepids in retaining a posterior dorsolateral plate in the trunk armor. Cobandrahlepis resembles Placolepis Ritchie, 1984, in the shape of the nuchal plate in the skull, and Austrophyllolepis Long, 1984, in the more lateral position of the sensory groove on the paranuchal plate. Yurammia, gen. nov., differs from all other phyllolepids in lacking ridged ornament on the dermal bones. These new taxa add to the diversity of early members of the order Phyllolepida from East Gondwana, before the appearance of the genus Phyllolepis in the Northern Hemisphere during the last stage of the Late Devonian (Famennian). Phyllolepid placoderms, only recorded from non-marine deposits, have a unique disjunct distribution in both time and space between the Southern an...Keywords
This publication has 20 references indexed in Scilit:
- Devonian tetrapod from western EuropeNature, 2004
- Groenlandaspidid placoderm fishes from the Late Devonian of North AmericaRecords of the Australian Museum, 2003
- A Devonian Tetrapod from North AmericaScience, 1994
- Some observations on the use of zircon U-Pb geochronology in the study of granitic rocksEarth and Environmental Science Transactions of the Royal Society of Edinburgh, 1992
- The relationships of placoderm fishesZoological Journal of the Linnean Society, 1986
- The upper Devonian Boyd Volcanic complex, Eden, New South WalesJournal of the Geological Society of Australia, 1979
- A primitive amphibian from the Late Devonian of New South WalesAlcheringa: An Australasian Journal of Palaeontology, 1977
- The Holonematidae (placoderm fishes), a review based on new specimens of Holonema from the Upper Devonian of Western AustraliaPhilosophical Transactions of the Royal Society of London. B, Biological Sciences, 1971
- Upper Devonian Fishes from New South WalesQuarterly Journal of the Geological Society, 1932
- The Upper Devonian Fishes of Victoria, Australia, and their Bearing on the Stratigraphy of the StateGeological Magazine, 1931