Johan Lindgren
Senior lecturer
The first record of Hainosaurus (Reptilia : Mosasauridae) from Sweden
Author
Summary, in English
Isolated marginal tooth crowns of the early Campanian mosasaur Hainosaurus Dollo, 1885, from the Kristianstad Basin and the Vomb Trough. southern Sweden, are described and illustrated. The teeth have been collected from a narrow stratigraphic interval corresponding to the highest belemnite zone in the lower part of the European two-fold division of the Campanian stage. A reexamination of dental and skeletal characters in two alleged species of Hainosaurus, 'H.' pembinensis Nicholls, 1988 and 'H.' gaudryi (Thevenin, 1896). and detailed comparisons with the corresponding elements in H. bernardi Dollo, 1885 and Tylosaurus proriger (Cope. 1869a), strongly indicate that 'H.' pembinensis and 'H.' gaudryi are both Tylosaurus Marsh, 1872. Diagnostic features of Hainosaurus include a very small infrastapedial process on the quadrate (conspicuous protuberance in Tylosaurus), flattened, symmetrically bicarinate marginal teeth (asymmetric and conical in Tylosaurus), short and wide pygal centra, and anteriorly situated intermediate caudal vertebral centra with dorsoventrally thin transverse processes (markedly triangular centra and thick processes in Tylosaurus).
Department/s
- Lithosphere and Biosphere Science
Publishing year
2005
Language
English
Pages
1157-1165
Publication/Series
Journal of Paleontology
Volume
79
Issue
6
Links
Document type
Journal article
Publisher
Paleontological Society
Topic
- Geology
Status
Published
ISBN/ISSN/Other
- ISSN: 0022-3360