Edited by oilshale
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Eocomatula interbrachiatus
Images: 
By TqB (edited)
Taxonomy
Feather star, free swimming crinoid
Kingdom: Animalia
Phylum: Echinodermata
Class: Crinoidea
Order: Isocrinida
Family: Pentacrinitidae
Genus: Eocomatula
Species: Eocomatula interbrachiatus
Author Citation (Blake, 1876)
Geological Time Scale
Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Early
International Age: Lower Pliensbachian (top)
Stratigraphy
Lias
Staithes Sandstone Formation
Biostratigraphy
Davoei Zone
Figulinum Subzone?
Provenance
Collector: self
Date Collected: 04/02/2013
Acquired by: Field Collection
Dimensions
Length: 25 cm
Location
North Yorkshire Coast
North Yorkshire
North East
England
Comments
An unusually complete specimen although crowns are well known from this location.
It has a very short stem consisting of only six or seven columnals, all of which bear cirri. Once thought to be an early comatulid, it is now thought to belong to a separate lineage of nearly stemless pentacrinitids (Hess 2014).
References:
Simms, M.J. 1989. British Lower Jurassic Crinoids. Monograph of the Palaeontographical Society, London:1-103, pls.1-15 (No. 581)
Hess, H. 2014 Origin and radiation of the comatulids (Crinoidea) in the Jurassic. Swiss J Palaeontol 133, 23–34
This was Invertebrate/Plant Fossil of the Month March 2015
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