Ctenosauriscidae is an extinct family of pseudosuchian archosaurs within the clade Poposauroidea.[1] Ctenosauriscids existed in Africa, Asia, Europe and North America during the Early Triassic to the Middle Triassic period (latest Olenekian to Anisian stages).[1] All species had large "sails" on their backs. Ctenosauriscids are among some of the earliest archosaurs and represent the first global radiation of the group.[2]
Arizonasaurus
Valid
Anisian
USA
Moenkopi Formation
Bromsgroveia
United Kingdom
Bromsgrove Sandstone Formation
Bystrowisuchus
Olenekian
Russia
Lipovskaya Formation
Ctenosauriscus
Germany
Solling Formation
Ctenosauriscus is one of the oldest archosaurs known to date.[2]
Hypselorhachis
Tanzania
Manda Formation
"Waldhaus" ctenosauriscid
Xilousuchus
China
Heshanggou Formation
Xilousuchus is one of the oldest archosaurs known to date.[2]
Ctenosauriscidae was named by Oskar Kuhn in 1964 to include the genus Ctenosauriscus.[3] It is a stem-based taxon defined by Richard J. Butler, Stephen L. Brusatte, Mike Reich, Sterling J. Nesbitt, Rainer R. Schoch and Jahn J. Hornung in 2011 as "the most inclusive clade containing Ctenosauriscus koeneni but not Poposaurus gracilis, Effigia okeeffeae, Postosuchus kirkpatricki, Crocodylus niloticus, Ornithosuchus longidens, or Aetosaurus ferratus".[2] The cladograms below follows a 2011 analysis by Butler et al., the first based on Brusatte et al. 2010[4] and the second based on Nesbitt 2011.[1]
Lotosauridae
Waldhaus ctenosauriscid
Poposaurus
Sillosuchus
Effigia
Shuvosaurus
Qianosuchus
Lotosaurus
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