A partial rostrum of the Porbeagle shark Lamna nasus (Lamniformes, Lamnidae) from the Miocene of the North Sea basin and the taxonomic importance of rostral morphology in extinct sharks

A fragmentary rostrum of a lamnid shark is recorded from the upper Miocene Breda Formation at Liessel (Noord-Brabant, The Netherlands); it constitutes the first elasmobranch rostral process to be described from Neogene strata in the North Sea Basin. Based on key features of extant lamniform rostra a...

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Bibliographic Details
Main Author: Mollen, F.H.
Format: Article in Journal/Newspaper
Language:English
Published: 2010
Subjects:
Animal morphology
Miocene
Chondrichthyes
Lamna nasus (Bonnaterre
1788) [Porbeagle]
Lamnidae
Lamniformes
ANE
Netherlands
Lamna nasus
Porbeagle
Online Access:https://www.vliz.be/imisdocs/publications/223928.pdf
Description
Summary:A fragmentary rostrum of a lamnid shark is recorded from the upper Miocene Breda Formation at Liessel (Noord-Brabant, The Netherlands); it constitutes the first elasmobranch rostral process to be described from Neogene strata in the North Sea Basin. Based on key features of extant lamniform rostra and CT scans of chondrocrania of modern Lamnidae, the Liessel specimen is assigned to the porbeagle shark, Lamna nasus (Bonnaterre, 1788). In addition, the taxonomic significance of rostral morphology in extinct sharks is discussed and a preliminary list of elasmobranch taxa from Liessel is presented.

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