A Cretaceous mammal from Tanzania

• Autorzy: Krause D W , Gottfried M.D. , O'Connor P.M. , Roberts E.M.
• Języki publikacji: EN

Abstrakty

EN

We report here the discovery of a Cretaceous mammal from the “Red Sandstone Group” of southwestern Tanzania. This specimen is one of only a very few Cretaceous mammals known from Gondwana in general and Africa in particular. The specimen consists of a short, deep left dentary that bore a large, procumbent central incisor, and five single−rooted, hypsodont cheek−teeth. The specimen is very tentatively identified as a sudamericid, and thus may represent the first African record of an enigmatic clade of mammals, the Gondwanatheria, which is otherwise known from the Late Cretaceous and Paleogene of several other Gondwanan landmasses. Unfortunately, the precise age of the specimen could not be determined. If it is pre−Campanian and if its identity as a sudamercid is corroborated through subsequent discoveries, it represents the earliest known gondwanatherian. If the specimen is from the Campanian or Maastrichtian, and again assuming its identification is correct, it has the potential to refute a recently formulated biogeographic hypothesis predicting the absence of certain terrestrial and freshwater vertebrate taxa, including gondwanatherians, in Africa (i.e., those that evolved elsewhere on Gondwana after Africa became an isolated landmass).

Słowa kluczowe

EN

mammal; Gondwana; Cretaceous; Mammalia; Africa; Tanzania; Gondwanatheria; paleontology

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2003
• Tom: 48
• Numer: 3
• Opis fizyczny: p.321-330,fig

Twórcy

autor

Krause D W

• Stony Brook University, Stony Brook, New York 11794-8081, USA

autor

Gottfried M.D.

autor

O'Connor P.M.

autor

Roberts E.M.

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