Also displaying other fully articulated fossillised crinoid individuals. The aboral cups or crowns, here attached to stems or stalks, the ossicles or articulated stems, science theorises, could have been as much as 50ft long on some large pelagic types. The proximal stem end attaches to the crown (the aboral cup is the calyx). Inside the crown which is the head of the crinoid, the arms were covered in cilia. These cilia have the appearance of feathery arms and passed the food to the mouth (situated inside the arms at the top of the calyx), where also in the crown the anus adjacent to the mouth was also situated.
A crinoid specimen fossil plate full of interesting echioderma, the crinoid part of the phylum echinodermata displays a strong single arched stem of one main individual, supporting a large crown or head, the junction of the stem and crown is where the brachial plates form the aboral cup, an inverted pyramid structure of plates. Also the feathery arms and pinnules are distinct, conservation of the fossil plate allowing the superb attributes of the crinoids to be studied.
The colony covered over very quickly in some undersea catastrophe millions of years ago, enabling an anoxic environment to persist, which subsequently expedited the process of per mineralization and fossilisation preserving these life forms until their eventual excavation. A rare and remarkable occurrence of the natural history of the Ordovician and Devonian periods.
A complex form of animal dating back to the Ordovician period. The type scientifically named as the Scyphocrinites elegans crinoid. The 'Scyphocrinites elegans crinoid [Crinoidea] commonly named sea-lily date back to the Paleozoic era, late Ordovician to lower Devonian approximately 420 to 380 million years. This type is extinct member of the Crinoidea ‘Phylum Echinodermata’ family which can be found in our oceans today.