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Hallautherium (basal mammaliaform) tooth from Late Triassic of Poland

From: Ben Creisler

A new online paper:

Marlena Świło, Grzegorz Niedźwiedzki, and Tomasz Sulej (2013)
Mammal-like tooth from the Upper Triassic of Poland.
Acta Palaeontologica Polonica (in press)

Triassic discoveries have extended the record of near-mammals
(Mammaliaformes) back to the Norian, about 215 Ma, and reveal a
significant diversity of Late Triassic (Norian-Rhaetian) forms. We now
add to this Late Triassic diversity a nearly complete double-rooted
right lower molariform tooth (ZPAL V.33/734) from the Polish Upper
Triassic that is significant because it comes from uppermost
Norian–lower Rhaetian rocks and is the first discovery of a
mammal-like tooth in the Mesozoic of Poland. The described tooth shows
transitional dental morphology between advanced cynodonts and
mammaliaforms and it appears to represent a basal mammaliaform
(Hallautherium genus), probably belonging to Morganucodonta.