Samlinger Lokaliteter TidstavleFaunalister Blin


Heptranchias sp.

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Katalognummer:
646
Accessionsnummer:
DK 703
Samling:
Danekræsamlingen
Samler:
Statens Naturhistorisk Museum
Finder:
Peter Mortensen
Bestemt af:
Jan Adolfssen
Lokalitet:
Gundstrup Grusgrav, NØ Fyn
Stratigrafi:
Kertemindemergel
Periode:
Sen Paleocæn [Selandian]
Type:
Konkretion
Sediment:
Kertemindemergel

Billede

Foto ©: Jan Adolfssen


 Beskrivelse:   af  Jan Adolfssen 
Evaluation of Danekræ DK 703 Heptranchias sp.

Description:
An elongated labio-lingually compressed tooth still embedded in matrix. The tooth has an acrocone followed by six in size decreasing accessory cusps. The tooth is split in the middle between the second and the third accessory cusp and is missing the apices of the acrocone and the third accessory cusp, but is otherwise complete. The acrocone carries four to five mesial serrae of increasing size.

Size: 12 mm long and 5 mm tall.

Conclusion:
This shark tooth belongs to the genus Heptranchias (sevengill shark) and is the first known specimen from the Kerteminde Mergel. It is not possible to identify the tooth to species level, due to the lack of diagnostic characters. The tooth remains however a very important specimen, due to its age and it contributes to our knowledge of the distribution of the early Heptranhias.


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