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Plotosaurus enters the LRT

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Figure 1. Skull of Plotosaurus. Note the mislabeling of the right supratemporal as a squamosal. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_skull588.jpg?w=584&h=389?w=300″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_skull588.jpg?w=584&h=389?w=584″ class=”size-full wp-image-33512″ src=”https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_skull588.jpg?w=584&h=389″ alt=”Figure 1. Skull of Plotosaurus. Note the mislabeling of the right supratemporal as a squamosal. ” width=”584″ height=”389″ srcset=”https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_skull588.jpg?w=584&h=389 584w, https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_skull588.jpg?w=150&h=100 150w, https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_skull588.jpg?w=300&h=200 300w, https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_skull588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 1. Skull of Plotosaurus. Note the mislabeling of the right supratemporal as a squamosal. The posterior frontal processes are atypical for lizards.

Plotosaurus benisoni (originally Kolposaurus, preoccupied; Camp 1942, 1951; Late Cretaceous; 9m) is a large mosasaur (Lepidosauria, Squamata, Scleroglossa) with relatively small flippers and a large tail fin. It enters the LRT as a sister to Tylosaurus. The nasals, tiny in Tylosaurus, are absent in Plotosaurus.

Figure 2. Plotosaurus from Camp 1951 with hypothetical body outline. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_overall5881.jpg?w=584&h=3070?w=57″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_overall5881.jpg?w=584&h=3070?w=195″ class=”size-full wp-image-33585″ src=”https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_overall5881.jpg?w=584&h=3070″ alt=”Figure 2. Plotosaurus from Camp 1951 with hypothetical body outline.” width=”584″ height=”3070″ srcset=”https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_overall5881.jpg?w=584&h=3070 584w, https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_overall5881.jpg?w=57&h=300 57w, https://pterosaurheresies.files.wordpress.com/2018/10/plotosaurus_overall5881.jpg 688w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 2. Plotosaurus from Camp 1951 with hypothetical body outline.

References
Camp CL 1942. California Mosasaurs. Memoirs of the University of California 13:1-68.
Camp CL 1951. Plotosaurus, a new generic name for Kolposaurus Camp, preoccupied. Journal of Paleontology 25:822.

wiki/Plotosaurus



Source: https://pterosaurheresies.wordpress.com/2018/10/11/plotosaurus-enters-the-lrt/
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