Are Crocodilians Like Dinosaurs?
Modern crocodilians and birds are the only living representatives of the Archosauria, a group that also includes non-avian dinosaurs and pterosaurs. Modern crocodilians originated during the early Cretaceous period and dispersed globally. Examples of physiological similarities between living crocodilians and birds include similar amino acids in b-keratins among crocodiles, turtles and birds; oviduct homologies between crocodilians and birds; similar forelimb structures in crocodiles and other archosaurs and similarities in gene expression in limb development in alligators and chickens. While individual crocodilian species have adapted their behaviours to meet specific strategies for survival in specific habitats, core reproductive behaviours are universal among modern crocodilians and transcend speciation, morphology and geographic distribution. Hard-wired core behaviours include social signals that incorporate chemosensory, auditory and mechanoreception modalities; construction of a temperature-stabilising nest chamber to incubate eggs; and parental care of their young.
Parental care may reflect a primitive character for archosaurs, including dinosaurs. Crocodilians use integumentary sense organs (ISOs) during courtship and in parental care, and similar structures may have had similar functions in dinosaurs. The presence of numerous foramina (possible ISOs) in the skulls of saurischians, along with the findings of fossilised nests with adults, may indicate similar complex behaviours, including parental care, in dinosaurs.
- Crocodylian Head Width Allometry and Phylogenetic Prediction of Body Size in Extinct Crocodyliforms
- Divergent Morphology among Populations of the New Guinea Crocodile, Crocodylus novaeguineae (Schmidt, 1928): Diagnosis of an Independent Lineage and Description of a New Species
- The Frontoparietal Fossa and Dorsotemporal Fenestra of Archosaurs and Their Significance for Interpretations of Vascular and Muscular Anatomy in Dinosaurs
- Surveying death roll behavior across Crocodylia
- Meeting Karen Allen
- Crocodiles using tools?
- Can Crocodiles change color?
- SAAF Film Credits
- Yacare caiman eating the eggs of a conspecific during oviposition
- Put Your Money Where Your Mouth Is…
- Are Crocodilians Like Dinosaurs?
- Crocodilian Immune Activity
- Field Research in Gambia
- Crocodile Laying Eggs After a Move
- Crocodile Food
- Crocodilian Enrichment: The good, the bad, and the untried
- Crocodilian Stationing: Incidental Benefits to a Basic Training Technique
- Crocodilian Tooth Replacement
- Crocodilians Drinking
- Pheromone Collection from Crocodilians
- Chinese Alligators
- Frozen Zoo
- Galloping Crocodilians
- Alligator CT Scan
- Crocodilians Eating Their Vegetables
- Crocodilians Swallowing Underwater
- Crocodiles as Parents
- Crocodiles Feeding Their Young
- Courtship Behavior of American Alligators
- Social Displays of the American Alligator
- Green screen
- Crocodilian Bite-force
- Endoscopy of Crocodilians
- Mummy Crocodiles