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Prestosuchidae : ウィキペディア英語版
Prestosuchidae

Prestosuchids were a group of Triassic carnivorous archosaurs. They were large active terrestrial apex predators, ranging from around in length. They succeeded the Erythrosuchidae as the largest archosaurs of their time. While resembling erythrosuchids in size and some features of the skull and skeleton, they were more advanced in their erect posture and crocodile-like ankle, indicating more efficient gait. Prestosuchids flourished throughout the whole of the middle, and the early part of the late Triassic, and fossils are so far known from Europe, India, Africa (Tanganyika), Argentina,and Paleorrota in Brazil. However, experts disagree regarding the phylogenetic relationships of the group, what genera should be included, and whether indeed the Prestosuchidae constitute a distinct family apart from the Rauisuchidae.
==Classification==
In 1957, Alan Charig proposed a new family, the Prestosuchidae, to include genera like ''Mandasuchus'', ''Prestosuchus'', and ''Spondylosoma''.
In 1967, Alfred Sherwood Romer placed ''Saurosuchus'' and ''Rauisuchus'' within Erythrosuchidae and adopted the Prestosuchidae to include ''Prestosuchus'', ''Procerosuchus'', and Charig's "Mandasuchus".
Prestosuchidae have often been included within Rauisuchidae, although they have sometimes considered the sister group of the aetosaurs in a monophyletic Pseudosuchia, or as a small clade intermediate between basal Crurotarsi and more advanced archosaurs such as the Aetosauridae and Rauisuchidae. J. Michael Parrish's 1993 cladistic analysis of crocodylotarsan archosaurs places the Prestosuchidae (including ''Prestosuchus'', ''Ticinosuchus'', and
''Saurosuchus'') outside the crocodylomorph - poposaurid - rauisuchid - aetosaur clade. In most cladograms Prestosuchids are considered more derived than phytosaurs and ornithosuchids, but usually less derived than the poposaurids and aetosaurs.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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