The earliest Tegulorhynchia (Brachiopoda: Rhynchonellida) and its evolutionary significance

McNamara, K. J. (1983) The earliest Tegulorhynchia (Brachiopoda: Rhynchonellida) and its evolutionary significance. Journal of Paleontology, 57 (3). pp. 461-473. ISSN 0022-3360 ESSN: 1937-2337

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Abstract

T- Tegulorhynchia boongeroodaensis n. sp. is described from the Early Paleocene-Early Eocene Cardabia Group in the Cararvon Basin of Western Australia. This is the earliest known occurrence of the genus. Changes in frequency of occurrence of this species correspond with changes in the nature of the sediment: highest frequency of occurrence is in greensands; upward stratigraphic change to calcarenites and ultimately to calcilutites is associated with diminution in frequency of occurrence of the brachiopod and is thought to relate to reduction in suitable sites of attachment. Like descendant species, T. boongeroodaensis underwent no morphological change during the course of its time range. Evidence is presented to indicate that evolution of later species of Tegu- lorhynchia and the closely related Notosaria proceeded by paedomorphosis. The result of this was attainment of a morphology adapted to regimes of higher hydr

Item Type: Article
Uncontrolled Keywords: AREP Nil
Subjects: 04 - Palaeobiology
Divisions: 04 - Palaeobiology
Journal or Publication Title: Journal of Paleontology
Volume: 57
Page Range: pp. 461-473
Depositing User: Sarah Humbert
Date Deposited: 16 Jul 2018 10:51
Last Modified: 16 Jul 2018 10:51
URI: http://eprints.esc.cam.ac.uk/id/eprint/2706

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