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A land plant not a sponge: A re-evaluation of the Mississippian demosponge Vintonia and the family Vintoniidae

Autor: Michael T. Dunn, Royal H. Mapes, J. K. Rigby

Publikováno v: Journal of Paleontology. 77:397-399

In 1956 two fossil specimens were exposed in concretions associated with two crushed body chambers of the orthoconic nautiloid Rayonnoceras sp. recovered from the Fayetteville Shale (Chesterian, upper Mississippian) of northern Arkansas. The two spec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4169df23d0a3fd3ada2efd6e0003858
https://doi.org/10.1017/s0022336000043754

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Evolution of Paleozoic Heteractinid Calcareous Sponges and Demosponges — Patterns and Records

Autor: J. K. Rigby

Publikováno v: Fossil and Recent Sponges ISBN: 9783642756580

Paleozoic sponges show many of the classic evolutionary patterns documented in other fossil groups, even though the sponge record is limited (Fig. 1). For example, shifts from thin-walled to thick-walled skeletons show well in both calcareous Heterac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e246e741370e0262cd284c36f2e7cf43
https://doi.org/10.1007/978-3-642-75656-6_8

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