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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Primary terms
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Canada
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Invertebrata
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Upper Mississippian
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Pennsylvanian
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Upper Pennsylvanian
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sedimentary rocks
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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limestone (1)
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Isorophida
Unusual ambulacral branching pattern in a new Ordovician giant edrioasteroid, Bizarroglobus
Morphological and systematic reinterpretation of two enigmatic edrioasteroids (Echinodermata) from Canada
New edrioasterine and astrocystitid (Echinodermata: Edrioasteroidea) from the Ninemile Shale (Lower Ordovician), central Nevada
THE SYSTEMATICS AND ONTOGENY OF PYRGOPOSTIBULLA BELLI , A NEW EDRIOASTEROID (ECHINODERMATA) FROM THE LOWER DEVONIAN OF NEW YORK
AN EDRIOASTEROID-DOMINATED ECHINODERM ASSEMBLAGE FROM A LOWER PENNSYLVANIAN MARINE CONGLOMERATE IN OKLAHOMA
PALEOECOLOGIC ANALYSIS OF EDRIOASTEROID (ECHINODERMATA) ENCRUSTED SLABS FROM THE CHESTERIAN (UPPER MISSISSIPPIAN) KINKAID LIMESTONE OF SOUTHERN ILLINOIS
THE SYSTEMATICS OF POSTIBULLINID EDRIOASTEROIDS
New Upper Ordovician edrioasteroids from Morocco
Abstract Edrioasteroids from the Katian, Lower Ktaoua and Upper Tiouririne formations provide new data on several previously described species and two new species of edrioasteroids. Ontogenetic and palaeoecological data are provided for Moroccopyrgus matacarros . Well-preserved oral areas and internal views of the oral frame show Euryeschatia reboulorum to be an unusual lebetodiscinid rather than an isorophinid. The pyrgocystid Spinadiscus lefebvrei n. gen. and sp. and the highly inflated isorophinid Panidiscus tamiformis n. gen. and sp. are described. Specimens of Moroccopyrgus matacarros and Euryeschatia reboulorum are only found attached to echinosphaeritid rhombiferans and conulariids, respectively, suggesting commensal relationships. Other species attach to a variety of different surfaces.
Origin and significance of Lovén's Law in echinoderms
A field guide to the Silurian Echinodermata of the British Isles: Part 2 – Crinoidea, minor groups and discussion
Cambrian echinoderm diversity and palaeobiogeography
Abstract The distribution of all known Cambrian echinoderm taxa, encompassing both articulated specimens and taxonomically diagnostic isolated ossicles, is documented for the first time. The database described by 2011 comprises 188 species recorded from 65 formations from around the world. Formations that have yielded articulated echinoderms are unequally distributed in space and time. Only Laurentia and West Gondwana provide reasonably complete records at the resolution of Stage. The review of the biogeographical distributions of the eight major echinoderm clades shows that faunas from Laurentia and Northeast Gondwana (China and Korea) are distinct from those of West Gondwana and Southeast Gondwana (Australia); other regions are too poorly sampled to make firm palaeobiogeographical statements. Analysis of alpha diversity (species per formation) shows that diversity rose initially to Cambrian Stage 5, declined into Guzhangian and Paibian before returning to Stage 5 levels by the end of the Cambrian. This pattern is replicated in Laurentia and West Gondwana. We show that taxonomically diagnostic ossicles found in isolation typically occur significantly earlier than the first articulated specimens of the same taxa and provide important information on the first occurrence and palaeobiogeographical distribution of key taxa, and of the phylum as a whole. Supplementary material: Articulated Cambrian echinoderms and Isolated plates of Cambrian echinoderms are provided at: http://www.geolsoc.org.uk/SUP18668