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The new Devonian (Givetian) heteractinid sponge Gondekia from Ontario, Canada, and evolution of the astraeospongiids and eiffeliids

Published online by Cambridge University Press:  14 July 2015

J. Keith Rigby
J. Keith Rigby*
Affiliation:
Department of Geology, Brigham Young University, Provo, Utah 84602
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Abstract

The new genus and species, Gondekia hastula, are described from the Middle Devonian (Givetian) Hungry Hollow Formation of southwestern Ontario. Astraeospongium lancifer Reimann, 1945, is also included in the new genus and A. acicularis is considered a synonym of that species. Gondekia has a flat saucer-like form and a felted, but thin, skeleton composed of at least three orders of regularly spaced and oriented simple sexiradiates. Gondekia is placed in the Eiffeliidae but is convergent toward the Astraeospongiidae in having a somewhat thickened wall.

Type
Research Article
Information
Journal of Paleontology , Volume 65 , Issue 1 , January 1991 , pp. 38 - 44
Copyright
Copyright © The Journal of Paleontology 

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