TY  - JOUR
AU  - Osés, Gabriel Ladeira
AU  - Wood, Rachel
AU  - Romero, Guilherme Raffaeli
AU  - Evangelista Martins Prado, Gustavo Marcondes
AU  - Bidola, Pidassa Malimda
AU  - Herzen, Julia
AU  - Pfeiffer, Franz
AU  - Stampar, Sérgio Nascimento
AU  - Alves Forancelli Pacheco, Mírian Liza
TI  - Ediacaran Corumbella has a cataphract calcareous skeleton with controlled biomineralization
JO  - iScience
VL  - 25
IS  - 12
SN  - 2589-0042
CY  - St. Louis
PB  - Elsevier
M1  - PUBDB-2022-07516
SP  - 105676
PY  - 2022
AB  - Summary:Corumbella is a terminal Ediacaran tubular, benthic fossil of debated morphology, composition, and biological affinity. Here, we show that Corumbella had a biomineralized skeleton, with a bilayered construction of imbricated calcareous plates and rings (sclerites) yielding a cataphract organization, that enhanced flexibility. Each sclerite likely possessed a laminar microfabric with consistent crystallographic orientation, within an organic matrix. Original aragonitic mineralogy is supported by relict aragonite and elevated Sr (mean = ca. 11,800 ppm in central parts of sclerites). In sum, the presence of a polarisation axis, sclerites with a laminar microfabric, and a cataphract skeletal organization reminiscent of early Cambrian taxa, are all consistent with, but not necessarily indicative of, a bilaterian affinity. A cataphract skeleton with an inferred complex microstructure confirms the presence of controlled biomineralization in metazoans by the terminal Ediacaran, and offers insights into the evolution of development and ecology at the root of the ‘Cambrian radiation’.
LB  - PUB:(DE-HGF)16
C6  - pmid:36561886
UR  - <Go to ISI:>//WOS:000908380500009
DO  - DOI:10.1016/j.isci.2022.105676
UR  - https://bib-pubdb1.desy.de/record/490157
ER  -