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By oilshale
Puffer toothfish
Kingdom: Animalia
Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Late
International Age: Tithonian
Weissjura Group
Painten Formation
Acquired by: Purchase/Trade
Length: 26 cm
Rygol Quarry
Painten
Bavaria
Germany
The genus Gyrodus is a characteristic faunal element of Late Jurassic marine environments and includes the largest known pycnodont (G. circularis, Upper Jurassic of southern Germany). Most pycnodonts are small to medium sized fishes with a standard body length of some 25 cm or less. Only a few large forms with a standard body length of more than 50 cm are known. Gyrodus circularis is the largest pycnodont with a standard body length up to 200 cm (KRIWET & SCHMITZ 2005).
References:
L. Agassiz (1843) Recherches Sur Les Poissons Fossiles. Tome I (livr. 18). Imprimerie de Petitpierre, Neuchatel xxxii-188.
Kriwet, J. (2005) A comprehensive study of the skull and dentition of pycnodont fishes. Zitteliana, 2005, A45, pp. 135-188.
Kriwet, J. and Schmitz, L. (2005) New insight into the distribution and palaeobiology of the pycnodont fish Gyrodus. Acta Palaeontologica Polonica 50 (1): 49–56.
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