2013/01/01 by Abelaid Loera Flores · 2 citations
Earth and Planetary Sciences · Environmental Science · #Paleontology and Evolutionary Biology #Evolution and Paleontology Studies #Ichthyology and Marine Biology #Premaxilla #Skull #Quadrate bone #Maxilla #Mandible (arthropod mouthpart) #Fibrous joint #Anatomy #Biology #Genus #Geography #Zoology
paper · pdf · doi:10.18268/bsgm2013v65n1a8
openalex publication_date 2013/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
A new mosasaur specimen was discovered in the Ojinaga Formation (Turonian) in Chihuahua, Mexico. It is described here based on an incomplete, slightly deformed skull. Comparative analysis reveals features from the parafamily Russellosaurinae, especially the genus Tylosaurus. Some features as the "V" shaped skull, well developed rostral process, 12 to 13 dentary and maxillary teeth, shape of premaxilla-maxilla suture, and similar proportions of mandible and quadrate bone are characteristics of Tylosaurus, and are similar to T. proriger and T. nepaeolicus, but the absence of an infrastapedial process indicates it is most closely related to T. kansasensis.