Genus
Valid Extinct

Scalamagnus

Clark et al. 2024

Scalamagnus is an extinct genus of polycotylid plesiosaur from the Late Cretaceous Tropic Shale Formation of the United States. The genus contains a single species S. tropicensis, known from a skull and two partial skeletons. Scalamagnus was historically considered to represent a species of the genus Dolichorhynchops before it was moved to its own genus.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
2
Group
Sauroptérygiens
Carnivore aquatic, depth=surface Marine
Scalamagnus
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Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Sauropterygia Suborder
›
Plesiosauria Order
›
Plesiosauroidea Superfamily
›
Polycotylidae Family
›
Polycotylinae Subfamily
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Scalamagnus Genus
Fossil sites 2 geolocated sites
Distribution
Top countries
🇺🇸 United States
2
Geological formations
Tropic Shale
2
Temporal distribution
Turonian (93.9–89.8 Ma)
2
Species (1)
Scalamagnus tropicensis 94 Ma
Images 1
Bibliography
Original description
R. O. Clark, F. R. O'Keefe, and S. E. Slack. 2024. A new genus of small polycotylid plesiosaur from the Upper Cretaceous of the Western Interior Seaway and a clarification of the genus Dolichorhynchops. Cretaceous Research 157:105812:1-35 DOI ↗
Bibliography (1)
R. O. Clark, F. R. O'Keefe, and S. E. Slack. 2024. A new genus of small polycotylid plesiosaur from the Upper Cretaceous of the Western Interior Seaway and a clarification of the genus Dolichorhynchops. Cretaceous Research 157:105812:1-35 DOI ↗