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Chanaresuchus palate question
The palate of Chanaresuchus includes two pairs of choanae. The
posterior set is separated by vomers. The premaxillary/vomer suture
is between the two. Is the anterior set properly considered a
vomernasal? Or something else?
Romer, A. S. (1971). The Chañares (Argentina) Triassic reptile fauna.
XI. Two new long-snouted thecodonts, Chanaresuchus and Gualosuchus.
A seemingly derived and smaller sister taxon, Tropidosuchus (Arcucci
1990) seems to have returned to the standard pattern with the
premaxillary/vomer suture at mid choanae, but the vomers are much
enlarged and the pterygoids much reduced and only adding to the
mystery of the palate here.