New Traversodontids (Synapsida: Eucynodontia) from the Triassic of Madagascar

Studies on continental Late Triassic tetrapod biochronology. II. The Ischigualastian and a Carnian global correlation

“…Flynn et al, 2000). This finding provides another clue for the correlation between the Isalo II fauna and the traversodontid biozone in addition to the dominance of traversodontids, as well as for the pre-Ischigualastian age of the former, as suggested by Flynn et al (2000).…”

“…Recently, Flynn et al (1998Flynn et al ( , 1999Flynn et al ( , 2000 reported a rich tetrapod fauna from the base of the 'Isalo II beds' (Makay Formation of Razafimbelo, 1987) in the southern part of the Morondava Basin, southwestern Madagascar, including procolophonids, prosauropod dinosaurs, sphenodontians, dicynodonts, traversodontid cynodonts, 'eosuchians,' and rhynchosaurs. Dicynodonts, procolophonids, traversodontids, and rhynchosaurs occur throughout the mid-late Triassic, whereas sphenodontians and prosauropods in the fauna suggest a Late Triassic age (Lucas, 1998a).…”

“…Jalil and Knoll, 2002) come from strata that appear coeval with the Ischigualasto Formation. However, Flynn et al (1999Flynn et al ( , 2000 suggest a pre-Ischigualastian age for their Isalo II fauna on the basis of (1) the absence of aetosaurs, (2) the high diversity of traversodontid cynodonts, and (3) the phylogenetic position of the rhynchosaur Isalorhynchus and the traversodontids Dadadon and Menadon.…”

“…Its importance is based on its identification not as a traversodontid but as a form closely related to, or even the sister taxon of, Exaeretodon (Hopson, 1985;Flynn et al, 2000;Abdala and Ribeiro, 2003). In this respect, the presence of traversodontids in the NorianRathian of Europe (Hahn et al, 1988;Godefroit and Battail, 1997;Godefroit, 1999) is not relevant, especially because they do not seem closely related to the Late Triassic traversodontids of south Pangea.…”

Studies on continental Late Triassic tetrapod biochronology. I. The type locality of Saturnalia tupiniquim and the faunal succession in south Brazil

“…In addition, the presence of a basal traversodontid such as Santacruzodon (Abdala and Ribeiro, 2003), together with the absence of Hyperodapedon, supports a pre-Hyperodapedon assemblage zone age for the Santa Cruz fauna. However, the occurrence of traversodontids ('Type I' of Abdala and Ribeiro, 2002) related to forms nested within the GomphodontosuchusExaeretodon clade (Flynn et al, 2000;Abdala and Ribeiro, 2003) suggests a faunal stage equivalent to those in which Exaeretodon-like traversodontids are present in the absence of hyperodapedontine rhynchosaurs (sensu Langer and Schultz, 2000a,b), such as is possibly the case of the Chiniquá local fauna (Barberena et al, 1985b;. It seems premature, however, to define a distinct biostratigraphic unit for the fauna of Santa Cruz before additional, especially noncynodont, material is recovered (cf.…”