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A new genus of brissid echinoid from the Miocene of Australia

Published online by Cambridge University Press:  01 May 2009

K. J. McNamara  and
C. Ah Yee
K. J. McNamara
Affiliation:
Department of Palaeontology, Western Australian Museum, Francis Street, Perth, Western Australia 6000, Australia
C. Ah Yee
Affiliation:
20 Bayley Street, Hamilton, Victoria 3300, Australia
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Abstract

The brissid echinoid Amoraster (gen. nov.) is described from Miocene strata in southern Australia on the basis of two species: A. paucituberculata sp. nov., which ranges from the Batesfordian (latest Early Miocene) Bochara Limestone to the Bairnsdalian–Mitchellian (Middle–Late Miocene) Port Campbell Limestone in Victoria; and A. tuberculata sp. nov. from the Longfordian (Early Miocene) Mannum Formation in South Australia. Morphological changes which occurred with the evolution of A. paucituberculata from A. tuberculata are interpreted as being adaptations to the occupation of a finer grained sediment by the descendant species.

Type
Articles
Information
Geological Magazine , Volume 126 , Issue 2 , March 1989 , pp. 177 - 186
Copyright
Copyright © Cambridge University Press 1989

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