Elgaecrinus uralicus gen. et sp. nov., a new crotalocrinitid (Crinoidea, Echinodermata) from the Lower Devonian (Lochkovian) of the Middle Urals

Elgaecrinus uralicus gen. et sp. nov. (Crotalocrinitidae, Crinoidea, Echinodermata), a reef-dwelling crinoid, is described from the Lochkovian (Lower Devonian) of the western slope of the Middle Urals. The arms of the new species are laterally fused in each radius and represent, as in the similar ge...

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Published inEstonian journal of earth sciences Vol. 67; no. 1; pp. 14 - 20
Main Author Rozhnov, Sergey
Format Journal Article
LanguageEnglish
Published Tallinn Teaduste Akadeemia Kirjastus (Estonian Academy Publishers) 20.03.2018
Estonian Academy Publishers
Subjects
Crinoidea
Devonian
Early Devonian
Echinodermata
ecology
Elgaecrinus uralicus
Field study
Fossils
functional–morphological analysis
Geology
Invertebrates
Marine biology
Marine invertebrates
Morphology
New species
Paleontology
Plate tectonics
Taxonomy
Turbulence
Urals
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ISSN1736-4728
1736-7557
DOI10.3176/earth.2017.23

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Summary:Elgaecrinus uralicus gen. et sp. nov. (Crotalocrinitidae, Crinoidea, Echinodermata), a reef-dwelling crinoid, is described from the Lochkovian (Lower Devonian) of the western slope of the Middle Urals. The arms of the new species are laterally fused in each radius and represent, as in the similar genus Crotalocrinites, uniform semi-mobile plates surrounding the central cavity above the oral surface in an en echelon series. This crown architecture allowed for feeding in rapidly changing turbulent currents characteristic of the reef zone.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 14
ISSN:1736-4728
1736-7557
DOI:10.3176/earth.2017.23