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English: Life restoration of the mid-Maastrichtian California mosasaur Plesiotylosaurus crassidens (Camp, 1942) with human scale.

Reference: Fossil evidence is limited to two skulls and other associated material, so postcranial body is modeled on its closest relative Prognathodon. Head is primarily informed by LACM 2759 in Camp (1942)[1] and Lindgren (2009)[2]. Total length of approximately 6.53 meters (21.4 ft) is based on a lower jaw length of 98 cm scaled to a ~15% head-total body ratio seen in Prognathodon (Konishi et al., 2011).[3] Bilobed tail based on soft tissue impressions of Prognathodon (Lindgren et al., 2013).[4] Body coloration was inspired by the dark skin coloration of Tylosaurus nepaeolicus identified by Lindgren et al. (2014)[5] as a speculative reflection of P. crassidens' convergent evolution with the tylosaurines.

Date July 2022
Source Own work
Author Macrophyseter

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  1. ↑ Camp, C.L. (1942). "California mosasaurs". Memoirs of the University of California 13: 1–68.
  2. ↑ Lindgren, J (2009). "Cranial Osteology of the Giant Mosasaur Plesiotylosaurus (Squamata, Mosasauridae)". Journal of Paleontology 83 (3): 448–456. DOI:10.1666/08-115.1.
  3. ↑ (2011). "New exceptional specimens of Prognathodon overtoni (Squamata, Mosasauridae) from the upper Campanian of Alberta, Canada, and the systematics and ecology of the genus". Journal of Vertebrate Paleontology 31 (5): 1026–1046. DOI:10.1080/02724634.2011.601714.
  4. ↑ (2013). "Soft tissue preservation in a fossil marine lizard with a bilobed tail fin". Nature Communications 4 (2423): 2423. DOI:10.1038/ncomms3423. PMID 24022259.
  5. ↑ (2014). "Skin pigmentation provides evidence of convergent melanism in extinct marine reptiles". Nature 506 (7489): 484–488. DOI:10.1038/nature12899. PMID 24402224.

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current01:16, 1 August 2022Thumbnail for version as of 01:16, 1 August 20223,253 × 1,665 (296 KB)MacrophyseterUploaded own work with UploadWizard

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