The osteology of a Lower Permian eosuchian from Texas and a review of diapsid phylogeny

1991/01/01 by Michel Laurin · 3 citations
Earth and Planetary Sciences · #Paleontology and Evolutionary Biology #Evolution and Paleontology Studies #Paleontology and Stratigraphy of Fossils #Osteology #Permian #Library science #Biology #Anthropology #Zoology #Archaeology #History #Sociology #Paleontology #Computer science

paper · doi:10.1111/j.1096-3642.1991.tb00886.x

openalex publication_date 1991/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

Apsisaurus witteri (gen. et sp. nov.), from the Lower Permian of Texas is identified as a diapsid, based on the presence of both a lateral temporal fenestra and a suborbital fenestra. Derived characters shared with neodiapsids but not with araeoscelidians suggest that Apsisaurus is more closely related to modern diapsids than to araeoscelidians. A phylogenetic analysis suggests that younginiforms are not part of the crown group of diapsids.

Citations

• The anatomy and relationships of the Lower Permian reptileAraeoscelis
• CONFIDENCE LIMITS ON PHYLOGENIES: AN APPROACH USING THE BOOTSTRAP
• The Carboniferous amphibian Proterogyrinus Scheelei Romer, and the early evolution of tetrapods
• Plesiosaur ancestors from the upper permian of Madagascar
• Confidence Limits on Phylogenies: An Approach Using the Bootstrap

Cited by

• The Origin and Early Evolution of Sauria: Reassessing the Permian Saurian Fossil Record and the Timing of the Crocodile-Lizard Divergence
• An enigmatic new archosauriform from the Carnian-Norian Ischigualasto Formation of Northwestern Argentina
• Araeoscelidia [wikipedia]