Understanding form and function of the stem in early flattened echinoderms (pleurocystitids) using a microstructural approach

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dc.contributor.author Gorzelak, Przemyslaw
dc.contributor.author Zamora Iranzo, Samuel Andrés
dc.date.accessioned 2020-09-28T10:56:51Z
dc.date.available 2020-09-28T10:56:51Z
dc.date.issued 2016-04-26
dc.identifier.citation Peer J. Physical Chemistry, 2016 es_ES
dc.identifier.issn 2167-8359
dc.identifier.uri http://hdl.handle.net/20.500.12468/419
dc.description.abstract Pleurocystitid rhombiferans are among the most unusual echinoderms whose mode of life has been long debated. These echinoderms are usually interpreted as vagile epibenthic echinoderms, moving over the sea bottom by means of a flexible stem. Although their life habits and posture are reasonably well understood, the mechanisms that control the movement of stem are highly controversial. Specifically, it is unknown whether the stem flexibility was under the control of muscles or ligamentary mutable collagenous tissues (MCTs). Here, we reconstruct palaeoanatomy of the two Ordovician pleurocystitid rhombiferans (Pleurocystites and Amecystis) based on stereom microstructure.Weshow that the articular facets of columnals in pleurocystitid rhombiferans are composed of fine labyrinthic stereom. Comparison with modern echinoderms suggests that this type of stereom was associated with muscles implying that their stem was a muscular locomotory organ supporting an active mode of life es_ES
dc.description.sponsorship Department of Biogeology, Institute of Paleobiology, Polish Academy of Sciences, Polonia es_ES
dc.description.sponsorship Unidad de Zaragoza, Instituto Geológico y Minero de España, España es_ES
dc.description.sponsorship National Museum of Natural History, Smithsonian Institution, Estados Unidos es_ES
dc.language.iso en es_ES
dc.relation CGL2012-39471 es_ES
dc.relation CGL2013-48877 es_ES
dc.rights Acceso abierto es_ES
dc.subject blastozoa es_ES
dc.subject stereom es_ES
dc.subject Canadá es_ES
dc.subject Paleozoic es_ES
dc.subject palaeoanatomy es_ES
dc.subject Rhombifera es_ES
dc.subject Ordovician es_ES
dc.title Understanding form and function of the stem in early flattened echinoderms (pleurocystitids) using a microstructural approach es_ES
dc.type Postprint es_ES
dc.relation.publisherversion https://peerj.com/articles/1820/ es_ES
dc.description.funder Ministerio de Economía y Competitividad es_ES
dc.identifier.doi https://doi.org/10.7717/peerj.1820 es_ES

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