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Revision as of 20:35, 24 December 2023 by Jfraatz (talk | contribs)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff) Genus of polycotylid plesiosaurs
| Scalamagnus Temporal range: Late Cretaceous (early Turonian), 93.5–92.0 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Superorder: | †Sauropterygia |
| Order: | †Plesiosauria |
| Family: | †Polycotylidae |
| Subfamily: | †Polycotylinae |
| Genus: | †Scalamagnus Clark, O’Keefe & Slack, 2023 |
| Type species | |
| †Scalamagnus tropicensis Clark, O’Keefe & Slack, 2023 | |
| Synonyms | |
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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.
Classification
Clark, O’Keefe & Slack (2023) recovered Scalamagnus as a polycotylid member of the plesiosaur clade Leptocleidia, as the sister taxon to the clade formed by Trinacromerum and the Dolichorhynchia within the Polycotylinae. The results of their phylogenetic analyses are shown in the cladogram below:
References
- ^ Clark, Robert O.; O’Keefe, F. Robin; Slack, Sara E. (2023-12-24). "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: 105812. doi:10.1016/j.cretres.2023.105812. ISSN 0195-6671.
- Sato, Tamaki; Wu, Xiao-Chun; Tirabasso, Alex; Bloskie, Paul (2011-03-17). "Braincase of a polycotylid plesiosaur (Reptilia: Sauropterygia) from the Upper Cretaceous of Manitoba, Canada". Journal of Vertebrate Paleontology. 31 (2): 313–329. doi:10.1080/02724634.2011.550358. ISSN 0272-4634.
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| Taxon identifiers | |
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| Scalamagnus | |