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Labes (eutherian mammal) jaw part found in Late Cretaceous of France
From: Ben Creisler
A new online paper:
Thomas Martin, Eric Buffetaut & Haiyan Tong (2014)
A Late Cretaceous eutherian mammal from southwestern France.
Paläontologische Zeitschrift (advance online publication)
The first jaw remain of the Late Cretaceous eutherian Labes is a
mandibular fragment from the Late Cretaceous (Maastrichtian) locality
Massecaps in Departement Herault in southwestern France. The mandible
holds three double-rooted molars (m1-3) with broken trigonids and
preserved talonids of which m1 apparently was the largest. The
entoconid is slightly approximated to the hypoconulid (69-74 % of the
distance between the hypoconulid and hypoconid). The talonid basin has
a rectangular shape, and the molar roots are not fused. An upper molar
(M1) from the same locality bears three roots; it is characterized by
a strong ectoflexus and a well-developed parastylar lobe. The largest
cusp is the conical pyramidal paracone, followed by the tetrahedral
shaped, very low protocone, and the small, distally placed metacone.
Previously, Labes was only known by a few isolated lower molars from
the late Campanian of Champ-Garimond (France) and the Maastrichtian of
El Molino near Quintanilla del Coco (northwestern Spain).