Dapedium stollorum THIES & HAUFF 2011

By oilshale (edited)

• December 22, 2018

Taxonomy

Kingdom: Animalia
Phylum: Chordata
Class: Actinopteri Cope 1871
Order: Dapediiformes Thies & Waschkewitz 2015
Family: Dapediidae Lehmann 1966
Genus: Dapedium
Species: Dapedium stollorum
Author Citation THIES AND HAUFF, 2011

Geological Time Scale

Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Early
International Age: Toarcian (early)

Stratigraphy

Altena Group
Posidonia Formation

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 23 cm

Location

Holzmaden
Esslingen District
Baden-Württemberg
Germany

• dapedium
• holzmaden
• jurassic
• posidonia shale

Comments

Taxonomy from Thies & Waschkewitz 2015.

Formerly identified as D. punctatum. Quote from Thies et Hauff, 2011:  "Specimens of Dapedium from the Posidonia Shale identified as D. punctatum by  QUENSTEDT (1858) were already suspected of not being conspecific with D. punctatum AGASSIZ, 1835 from the Lower Liassic (Sinemurian) of England by WAGNER as early as 1860."

Diagnosis from Thies & Hauff 2011, p. 188: "Body ellipsoidal to circular in outline, rostral and ventral borders of the operculum forming an obtuse angle of 100° to 120°, caudal margin of scales serrated, anterior scales behind the operculum of the second to fourth vertical row with a length/height ratio ranging between 0.29 and 0.32, marginal teeth unicuspid."

References:

D. Thies and B. Hauff: A new species of Dapedium LEACH, 1822 (Actinopterygii, Neopterygii, Semionotiformes) from the Early Jurassic of South Germany. Palaeodiversity 4: 185–221; Stuttgart 30 December 2011.

Thies, D. & Waschkewitz, J. 2015. Redescription of Dapedium pholidotum (Agassiz, 1832) (Actinopterygii, Neopterygii) from the Lower Jurassic Posidonia Shale, with comments on the phylogenetic position of Dapedium Leach, 1822. Journal of Systematic Palaeontology, 14 (4): 339-364. doi: 10.1080/14772019.2015.1043361