Samlinger Lokaliteter TidstavleFaunalister Blin


Heterodontus sp.

 Faktiske data om fund 
Katalognummer:
881
Accessionsnummer:
DK 910
Samling:
Danekræsamlingen
Samler:
Statens Naturhistorisk Museum
Finder:
Stefan Polkowsky
Bestemt af:
Stefan Polkowsky
Lokalitet:
Løsblok, Kerteminde, Fyn
Stratigrafi:
Periode:
Danien
Type:
Sediment:
Danien flint

Billede

Foto ©: Sten Lennart Jakobsen


Billede

Foto ©: Sten Lennart Jakobsen


 Beskrivelse:   af  Gilles Cuny 
DK 910 represents a dorsal fin spine of a shark found in a Danian sediment at Kerteminde Bugt on Fyn Island. The spine is approximately 40 mm long and its upper half is covered by an enamel cover. Such a morphology is nowadays encountered in the horn-shark Heterodontus and some dogfish belonging to the Squaliformes. Both are known in the Danian fossil record of Denmark based on isolated teeth (Adolfssen & Ward, 2015). The well-developed basal part without enamel of DK 910 as well as the contact between the base and the enamelled part almost perpendicular to the axis of the spine suggest that this spine belongs to the genus Heterodontus rather than to Squalus (Maisey, 1982). It should be noted, however, that this could be an artefact of preservation. Anyway, this is the first record, to the best of my knowledge, in the Danish Danian of such a well-preserved fin spine that could be identified at genus-level, and this justifies its nomination as a Danekrae fossil.

Reference:
Joachim LADWIG & Stefan POLKOWSKY, 2016: Der Flossenstachel eines Haies der Gattung Heterodontus (Neoselachii, Heterodontiformes) aus einem Flintgesciebe des Danium von Fünen. Der Gesciebesamler 48, 4, p. 129 -133


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