La radiation des échinodermes au Paléozoïque inférieur, l'exemple des blastozoaires.

6533b857fe1ef96bd12b4f47

RESEARCH PRODUCT

La radiation des échinodermes au Paléozoïque inférieur, l'exemple des blastozoaires.

Rich Mooi Bruno David Elise Nardin Elise Nardin Bertrand Lefebvre

subject

010506 paleontology General Engineering Évolution Biostratigraphy Blastozoa EAT 010502 geochemistry & geophysics 01 natural sciences Phylogenèse [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology Humanities Geology 0105 earth and related environmental sciences [ SDU.STU.PG ] Sciences of the Universe [physics]/Earth Sciences/Paleontology Echinodermata Paléozoïque

description

10 pages; Le sous-phylum Blastozoa est un des groupes d'échinodermes les plus diversifiés (dix classes) au début du Paléozoïque. Après révision critique de leur squelette, leurs morphologies en apparence très variées sont en fait homogènes. Leur diversité montre deux pics (Drumien, Sandbien) liés par un événement de fortes apparitions génériques au Cambrien supérieur-Ordovicien inférieur. Les blastozoaires montrent un fort endémisme au Cambrien et un important provincialisme à l'Ordovicien inférieur et moyen. Ils deviennent cosmopolites à l'Ordovicien supérieur, par plusieurs événements migratoires. Ils sont restreints à la Laurentia et à Baltica au Silurien inférieur.

year	journal	country	edition	language
2009-03-01

10.1016/j.crpv.2008.09.004 https://hal.archives-ouvertes.fr/hal-00367951

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