Insights into the skeletonization, lifestyle, and affinity of the unusual ediacaran fossil Corumbella

Mírian L.A.Forancelli Pacheco, Douglas Galante, Fabio Rodrigues, Juliana De M. Leme, Pidassa Bidola, Whitey Hagadorn, Marco Stockmar, Julia Herzen, Isaac D. Rudnitzki, Franz Pfeiffer, Antonio C. Marques

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51 Scopus citations

Abstract

The Ediacaran fossil Corumbella is important because it is hypothesized to be a scyphozoan cnidarian, and thus might be one of the rare examples of bona fide Neoproterozoic animals. Unfortunately, its mode of life, style of skeletonization, and taxonomic affinity have been very controversial. Here, we use X-ray micro-CT, SEM, and taphonomic analysis to compare preservational modes of Corumbella, in order to better understand the symmetry, mode of construction, preservational style, and taxonomy of this group. Results suggest that articulated and disarticulated specimens of Corumbella from the Ediacaran of Brazil, Paraguay, and the United States, although sometimes preserved very differently, represent the same taxon - Corumbella werneri. Corumbellids had a thick but flexible theca and probably lived with their basalmost part anchored in the sediment, much like Conotubus. When considered together, these results suggest that Corumbella was one of the first animals to build a skeleton, employing a lamellar microfabric similar to conulariids.

Original languageEnglish
Article numbere0114219
JournalPLoS ONE
Volume10
Issue number3
DOIs
StatePublished - 30 Mar 2015

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