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File:Parasuchus hislopi skull.png

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Description
English: The skull of ISI R42, a specimen which belongs to Parasuchus hislopi, a species of phytosaur. Image is mirrored from left lateral view. Scale bar equals 5 centimeters. Numbers indicate character states scored in the data matrix. Character state scores=
  • 10-1: External naris is considerably posteriorly displaced, but the posterior rim of the naris is still well anterior to the anterior rim of the orbit.
  • 11-1: External naris is directed dorsally.
  • 20-2: The antorbital length of the skull (length from the tip of the skull to the tip of the orbit) is .70-.76 times the total length of the skull
  • 28-4: The length of the premaxilla is more than 5 times its height.
  • 50-2: The length of the maxilla in front of the antorbital fenestra is .64-.76 times the total length of the bone.
  • 54-2: An antorbital fossa is present on horizontal process of the maxilla but does not reach the posteroventral corner of the antorbital fenestra.
  • 105-1: The posterior process of the jugal lies ventral to the anterior process of the quadratojugal.
  • 133-1: A depression on the lateral surface of the ventral process of the postorbital is present.
  • 142-1: The posterior process of the squamosal is ventrally curved.
  • 156-2: The ventral end of the quadratojugal has a strongly developed posterior expansion, overlapping the ventral condyles of the quadrate.
  • 263-2: The length of the external mandibular fenestra is .71-.88 times the length of the dentary anterior to the fenestra.
  • 266-0: At minimum, the height of the dentary is .05-.14 times the length of the tooth-bearing portion of the bone.
  • 269-1: A longitudinal groove is present on the dentary.
  • 271-1: The anterior portion of the dentary is dorsally expanded, taller than the posterior portion of the bone.
Date
Source The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms. (2016) PeerJ 4:e1778 https://doi.org/10.7717/peerj.1778
Author Martin D. Ezcurra

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