Hapalocrinus elegans JAEKEL, 1895

Taxonomy

Crinoid

Kingdom: Animalia
Phylum: Echinodermata Klein 1754
Class: Crinoidea Miller 1821
Order: Monobathrida Moore and Laudon 1943
Family: Hapalocrinidae Jaekel 1895
Genus: Hapalocrinus
Species: Hapalocrinus elegans
Author Citation JAEKEL, 1895

Geological Time Scale

Eon: Phanerozoic
Era: Paleozoic
Period: Devonian
Sub Period: None
Epoch: Early
International Age: Emsian (early)

Stratigraphy

Hunsrück Slate Group
Kaub Formation
Eschenbach Member

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 20 cm

Location

Eschenbach-Bocksberg Quarry
Bundenbach
Rheinland-Pfalz
Germany

• bundenbach
• crinoid
• devonian
• emsian
• eschenbach
• hapalocrinus
• tff-oilshale-ec1789

Comments

Taxonomy from Mindat.org.

Description for the genus from Südkamp 2017, p. 106" The uniseral arms branch at least once above the second brachial. Proximally they bear pinnules on every second brachial. Beyond  the seventh of these, a pinnule is attached to every brachial. Hapalocrinus has quadrangular  or rectangular brachials. The anal tube is absent or incipient. The stem is slender. Some elements of the upper stem bear straight spines."

Hapalocrinus elegans has only ten slender free arms and no spines.

Identified by oilshale. 

References:

C. Bartels, M. Poschmann, T. Schindler & M. Wuttke (with contributions by H.-G. Mittmeyer) (2002) Palaeontology and palaeoecology of the Kaub Formation (Lower Emsian, Lower Devonian) at Bundenbach (Hunsrück, SW Germany). Metalla (Bochum) 9.2, p. 105-122.
Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil, München.