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- Title
A new actinopterygian Cheirolepis jonesi nov. sp. from the Givetian of Spitsbergen, Svalbard.
- Authors
Newman, Michael J.; Burrow, Carole J.; den Blaauwen, Jan L.; Giles, Sam
- Abstract
Two specimens of a new early actinopterygian Cheirolepis jonesi nov. gen. et sp. have been collected from the lagoonal Middle Devonian (Givetian) Fiskekl0fta Member, the upper member of the Tordalen Formation in the Mimerdalen Subgroup of Spitsbergen. This is the second oldest Cheirolepis species known from articulated remains. The holotype consists of an articulated head and the anterior trunk. The other specimen is an articulated skull which was 3D scanned to determine the internal structure and general architecture. The new taxon differs from other Cheirolepis species in the relative dimensions of the bones of the head, including a narrow anterior end of the dentary, longer accessory operculum and correspondingly shorter dermohyal, as well as a longer premaxilla and proportionally larger quadratojugal, and the organisation and relative size of the teeth.
- Subjects
SPITSBERGEN Island (Norway); ARCTIC regions; SVALBARD (Norway); SKULL; SPECIES; ACTINOPTERYGII; HISTOLOGY
- Publication
Norwegian Journal of Geology, 2021, Vol 101, p1
- ISSN
2387-5852
- Publication type
Article
- DOI
10.1785/njg101-1-3