Bdellacoma verruculosa Lehmann 1957

By oilshale

• December 16, 2022

Taxonomy

Kingdom: Animalia
Phylum: Echinodermata Klein 1754
Class: Stenuroidea Spencer 1951
Order: Incertae sedis
Family: Bdellacomidae Spencer and Wright 1966
Genus: Bdellacoma
Species: Bdellacoma verruculosa
Author Citation Lehmann 1957

Geological Time Scale

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

Stratigraphy

Hunsrück Slate Group
Kaub Formation

Provenance

Acquired by: Purchase/Trade

Dimensions

Diameter: 9.5 cm

Location

Eschenbach-Bocksberg Quarry
Bundenbach
Rheinland-Pfalz
Germany

• bdellacoma
• bundenbach
• devonian
• emsian
• kaub formation
• tff-oilshale-ec2729
• urasterella verruculosa
• verruculosa

Comments

Originally described under the name Urasterella verruculosa Lehmann 1957.
Taxonomy from Fossilworks.org.

Description from Südkamp 2017, p. 130: " The five, ribbon-like, flattened long arms join at the mouth frame; there is no interbrachial disc. The mouth frame is built as a ring of robust plates. The plates of the dorsal surface (radials, a primary circlet, and the large madreporite) are difficult to determine with certainty. Pedicellariae are irregularly arranged on the dorsal surface and as an organized fringe by the spacing of the adambulacrals. The pedicellariae are rounded triangular in outline. The ambulacrals are flat plates with a T-shaped ridge. Their arrangement across the arm midline is neither strictly paired nor alternate."

Identified by oilshale using Südkamp 2017.

References:
Lehmann. W. M. (1957) Die Asterozoen in den Dachschiefern des rheinischen Unterdevons. Abhandlungen des Hessischen Landesamtes für Bodenforschung 21:1-160.
Hotchkiss, Frederick & Glass, A.. (2010) Bdellacoma in the Hunsrück Slate (Lower Devonian): Reidentification of Urasterella verruculosa (Asteroidea, Bdellacomidae). Echinoderms: Durham - Proceedings of the 12th International Echinoderm Conference. 15-21. 10.1201/9780203869543-c3. 
Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.