The new genus Talacastospongia: insights on the first record of a Devonian sponge from South America

The Lower Devonian (Lochkovian) hexactinellid sponge Talacastospongia minima new genus new species is reported from the lower beds of the Talacasto Formation in the Argentine Precordillera. It represents the first Devonian sponge from South America and the best record in the paleobiogeographic conte...

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Bibliographic Details
Published in:Journal of paleontology 2015-11, Vol.89 (6), p.912-919
Main Authors: Carrera, Marcelo G, Rustán, Juan José
Format: Article
Language:English
Subjects:
Aquatic life
Devonian
Paleontology
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Summary:The Lower Devonian (Lochkovian) hexactinellid sponge Talacastospongia minima new genus new species is reported from the lower beds of the Talacasto Formation in the Argentine Precordillera. It represents the first Devonian sponge from South America and the best record in the paleobiogeographic context of the Malvinokaffric Realm, otherwise virtually devoid of spiculate sponges. This discovery provides some tentative insights on the age and oldest record of the Family Pileolitidae. The paleogeographical context for this new finding shows a high latitude setting with a notable scarcity of hexactinellid sponges recorded to date in Devonian Malvinokaffric basins, and the absence of calcareous spiculate sponges (heteractinids) and hypercalcified sponges (stromatoporoids, sphinctozoans).
ISSN:0022-3360
1937-2337
DOI:10.1017/jpa.2016.9