A crocodyliform from the Early Cretaceous Dinosaur Beds, northern Malawi
- 19 June 1997
- journal article
- research article
- Published by Taylor & Francis in Journal of Vertebrate Paleontology
- Vol. 17 (2) , 280-294
- https://doi.org/10.1080/02724634.1997.10010975
Abstract
In 1989 a crocodyliform having a mammal-like dentition was reported from the Early Cretaceous of Malawi, Africa. It shares with Notosuchus of South America the following derived features: jaw articulation that permitted longitudinal movement and the occipital condyle on the ventral surface of the braincase. The Malawi crocodyliform is distinct from Notosuchus in possessing multicusped posterior teeth, narrow and elongate prefrontals, no maxillo-palatal fenestrae, deeply overhung squamosal, and a longer, flat jaw articulation surface. The long, flat jaw articulation and tooth morphology suggest proal processing of food. The Malawi crocodyliform has cervical vertebrae with well developed hypapophyses and tall neural spines indicating strong neck muscles. The femur has a well developed medially directed head and posteriorly directed distal condyles. The crus projects from the tarsals vertically. These features suggest an erect posture and cursorial ability. The supracondylar ridges of the humerus are well developed for muscle attachment indicating strong rotation and retraction of the humerus. Articulated specimens suggest preservation in burrows.Keywords
This publication has 26 references indexed in Scilit:
- Mesozoic plate tectonic reconstructions of the central South Atlantic Ocean: The role of the West and Central African rift systemPublished by Elsevier ,2003
- Geochronology and cooling history of the northern part of the Chilwa Alkaline Province, MalawiJournal of African Earth Sciences, 1995
- Fossil evidence of interactions between plants and plant-eating mammalsPhilosophical Transactions Of The Royal Society B-Biological Sciences, 1991
- Mammal-Like Dentition in a Mesozoic CrocodylianScience, 1989
- Locomotion in Moles (Insectivora, Proscalopidae) from the Middle Tertiary of North AmericaScience, 1982
- A skeleton ofMesoscalops(Mammalia, Insectivora) from the Miocene Deep River Formation, Montana, and a review of the proscalopid moles: evolutionary, functional, and stratigraphic relationshipsJournal of Vertebrate Paleontology, 1981
- An early Cretaceous terrestrial crocodilian and the opening of the South AtlanticNature, 1979
- Functional and ecological significance of relative growth in AlligatorJournal of Zoology, 1975
- Dinosaur Monophyly and a New Class of VertebratesNature, 1974
- Ecological or Phylogenetic Interpretations of Crocodilian Nesting HabitsNature, 1972