Are turtles in Archosauromorpha?
Are turtles in Archosauromorpha?
Background. Turtles and crocodilians (extant non-avian Archosauromorpha) are among the most charismatic and widely recognized of all living things [1]. The stem lineages of both groups date to the Triassic, and exhibit highly derived, yet highly conserved body forms among extant species.
Are birds Archosauromorpha?
The phylogenetic definition of Archosauria is the most recent common ancestor of birds and crocodiles, and all of its descendants. The “new” Archosauria still includes crocs, birds, non-avian dinosaurs, and pterosaurs, as well as some of the old “thecodont” groups like phytosaurs and aetosaurs.
Are dinosaurs archosauromorphs?
These were the Archosauriformes, a diverse assortment of animals including the famous dinosaurs and pterosaurs. Two subclades of Archosauriformes survive to the present day: the semiaquatic crocodilians and the last of the feathered dinosaurs: birds.
Are lizards archosaurs?
‘ruling reptiles’) is a clade of diapsids, with birds and crocodilians as the only living representatives. Archosaurs /ˈɑːrkəˌsɔːr/ are broadly classified as reptiles, in the cladistic sense of term which includes birds….Archosaur.
| Archosaurs Temporal range: Early Triassic–Present, | |
|---|---|
| Clade: | Archosauria Cope, 1869 |
| Subgroups |
What clade are turtles?
order testudines
The order testudines is a monophyletic clade containing 260 species of extant turtles, terrapins and tortoises in 13 families.
Are turtles Lepidosaurs or archosaurs?
In the large number of publications on the topic over the past decade, turtles have been grouped with Archosauria (birds and crocodiles) in most studies [18–22], but have also been grouped with crocodiles [23–26] or sometimes with Lepidosauria (tuatara, lizards, and snakes) [27].
Are mosasaurus archosaurs?
Mosasaurs are not dinosaurs. The term “dinosaur” is actually very specific and describes only the land-dwelling descendants of the “ruling reptiles”, the archosaurs. Mosasaurs, on the other hand, are more closely related to modern-day lizards.
Are birds synapsids?
Birds, despite being warm-blooded, air-breathing vertebrates, are, of course, not mammals, or even synapsids. Instead, they are diapsids, part of an evolutionary line that parted company from the synapsid/mammalian line over 300 million years ago, and which today also includes most, perhaps even all, of the reptiles.
Are turtles archosaurs?
Are birds ornithischians?
Despite their name, ornithischians are not related to birds, which evolved from theropod saurischian dinosaurs. Ornithischians were also distinguished by an extra bone at the tip of the lower jaw called the predentary.
