The first record of Hainosaurus (Reptilia : Mosasauridae) from Sweden

Research output: Contribution to journalArticle

Standard

The first record of Hainosaurus (Reptilia : Mosasauridae) from Sweden. / Lindgren, Johan.

In: Journal of Paleontology, Vol. 79, No. 6, 2005, p. 1157-1165.

Research output: Contribution to journalArticle

Harvard

APA

CBE

MLA

Vancouver

Author

RIS

TY - JOUR

T1 - The first record of Hainosaurus (Reptilia : Mosasauridae) from Sweden

AU - Lindgren, Johan

PY - 2005

Y1 - 2005

N2 - 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).

AB - 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).

U2 - 10.1666/0022-3360(2005)079[1157:TFROHR]2.0.CO;2

DO - 10.1666/0022-3360(2005)079[1157:TFROHR]2.0.CO;2

M3 - Article

VL - 79

SP - 1157

EP - 1165

JO - Journal of Paleontology

T2 - Journal of Paleontology

JF - Journal of Paleontology

SN - 0022-3360

IS - 6

ER -