References / paperThe Sail-Backed Reptile Ctenosauriscus from the Latest Early Triassic of Germany and the Timing and Biogeography of the Early Archosaur Radiation
Butler, R.J.; Brusatte, S.L.; Reich, M.; Nesbitt, S.J.; Schoch, R.R.; Hornung, J.J.
Year2011
Source roleprimary-study
DOI / ID10.1371/journal.pone.0025693
Fitness and scope
range · taxonomy · topology · morphology · biogeography · geochronology · methods
Primary redescription of holotype GZG.V.4191, stratigraphic review and a 58-taxon, 192-character analysis; latest Olenekian placement supplies a sampled crown-archosaur minimum rather than an origin date.
Claim ledger
fossil-range · mediumCtenosauriscus GZG.V.4191 from latest Olenekian strata near 247.2 Ma anchors the 247.2–0 Ma Archosauria route; its pseudosuchian placement and stratigraphic age provide a sampled crown minimum, not a global origin or complete early-archosaur record.
claim:taxon:archosauria:root-range