File:Merriam 1905 Plate 1.png

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Summary

Description
English: Explanation of Plate 1

Thalattosaurus alexandrae. Type specimen. All figures three fourths natural size.

  • Fig. 1 Anterior portion of cranium and mandible. Cranium slightly distorted, the anterior end of the maxilla being covered.
  • Fig. 2 Palatal view of cranium.
  • Fig. 3 Inner side of mandible.

LEGEND:

  • F, frontal
  • Pf,prefrontal
  • N, nasal
  • A, doubtful element anterior to narial opening
  • Pm, premaxillary
  • M, maxillary
  • L, lachrymal
  • Pl, palatine
  • J, jugal
  • V, prevomer
  • I, inferior nasal opening
  • Sa, supra-angular
  • An, angular
  • D, dentary
  • Sp, splenial

a, b, c, sections of cranium. See Pl. II, figs. 1a, 1b, 1c.

N and A in fig. 1 are situated in the superior nasal opening.
Date
Source (1905). "The Thalattosauria: a group of marine reptiles from the Triassic of California". Memoirs of the California Academy of Sciences. 5 (1): 1–52
Author John C. Merriam

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