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Multituberculate mammals from the Cretaceous of Uzbekistan

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Kielan-Jaworowska Z., Nessov L. A.

Acta Palaeontologica Polonica

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1992

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tom 37

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nr 1

1-17

The first western Asian multituberculates found in the Bissekty Formation (Coniacian) of Uzbekistan are described on the basis of a lower premolar (p4), a fragment of a lower incisor, an edentulous dentary, a proximal part of the humerus and a proximal part of the femur. Uzbekbaatar kizylkumensis gen. et sp. n. is defined as having a low and arcuate p4, possibly without a posterobuccal cusp; it presumably had two lower premolars, as inferred from the presence of a triangular concavity at the upper part of the anterior wall of p4, and p3 less reduced in relation to p4 than in non-specialized Taeniolabidoidea and Ptilodontoidea. Uzbekbaatar is placed in the Cimolodonta without indicating family and infraorder. It might have originated from the Plagiaulacinae or Eobaatarinae.

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Multituberculate mammals from near the Early-Late Cretaceous boundary, Cedar Mountain Formation, Utah

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Eaton J. G., Cifelli R. L.

Acta Palaeontologica Polonica

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2001

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tom 46

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nr 4

Herein we describe the oldest well-sampled multituberculate assemblage from the Cretaceous of North America. The fauna is dated at 98.37 Ma and thus approximates the Albian-Cenomanian (Early-Late Cretaceous) boundary. The multituberculate fauna is diverse. Two of the multituberculates (Janumys erebos gen. et sp. n. and an unidentified taxon) are provisionally placed among 'Plagiaulacida'. Another taxon, Ameribaatar zofiae gen. et sp. n., is of uncertain subordinal affinities. The remaining multituberculates appear to represent the advanced suborder Cimolodonta and fall within the 'Paracimexomys group'. We rediagnose Paracimexomys on the basis of the type species, P. priscus, and refer to other species as cf. Paracimexomys (including cf. P. perplexus sp. n.). A revised diagnosis is also provided for Cenomanian Dakotamys. A previously-described species from the Cedar Mountain Formation is placed in Cedaromys gen. n. as C. bestia, together with C. pawus sp. n. Bryceomys is represented in the fauna by B. intermedius sp. n. Relationships of Paracimexomys-group to later taxa remain obscure. However, Bryceomys and Cedaromys share a number of features with Cimolodontidae. Given these resemblances, together with the fact that Cimolodontidae retain certain plesiomorphies (stout lower incisor, gigantoprismatic enamel) with respect to Ptilodontoidea (to which they are commonly referred), we suggest that Cimolodontidae may have arisen from a clade within the 'Paracimexomys group', independent of ptilodontoids.

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Second specimen of Corriebaatar marywaltersae from the Lower Cretaceous of Australia confirms its multituberculate affinities

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Rich T. H., Krause D. W., Trusler P., White M. A., Kool L., Evans A. R., Morton S., Vickers-Rich P.

Acta Palaeontologica Polonica

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2022

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tom 67

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nr 1

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An Australian multituberculate and its palaeobiogeographic implications

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Rich T. H., Vickers-Rich P., Flannery T. F., Kear B. P., Cantrill D. J., Komarower P., Kool L., Pickering D., Trusler P., Morton S., Van Klaveren N., Fitzgerald E. M. G.

Acta Palaeontologica Polonica

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2009

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tom 54

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nr 1

1-6

A dentary fragment containing a tiny left plagiaulacoid fourth lower premolar from the Early Cretaceous (Aptian) of Victoria provides the first evidence of the Multituberculata from Australia. This unique specimen represents a new genus and species, Corriebaatar marywaltersae, and is placed in a new family, Corriebaataridae. The Australian fossil, together with meagre records of multituberculates from South America, Africa, and Madagascar, reinforces the view that Multituberculata had a cosmopolitan distribution during the Mesozoic, with dispersal into eastern Gondwana probably occurring prior to enforcement of climatic barriers (indicated by marked differentiation in regional floras) in the Early Cretaceous.

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First ? cimolodontan multituberculate mammal from South America

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Kielan-Jaworowska Z., Ortiz-Jaureguizar E., Vieytes C., Pascual R., Goin F. J.

Acta Palaeontologica Polonica

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2007

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tom 52

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nr 2

We describe a Cretaceous ?cimolodontan multituberculate p4 from South America, for which we erect the new genus and species Argentodites coloniensis. This new taxon is represented by an isolated ?left p4 from the Upper Cretaceous (?Campanian or Maastrichtian) La Colonia Formation of Patagonia (Fig. 1). It has a strongly convex anterior margin and prismatic enamel, which attest to its cimolodontan nature, while the previously known p4 (MACN−RN 975) from the Late Cretaceous Los Alamitos Formation is roughly rectangular, suggesting “plagiaulacidan” affinity. The presence of normal prismatic enamel in Argentodites suggests similarities to Ptilodontoidea. However, it differs from the Late Cretaceous and Paleocene Laurasian cimolodontans (including Ptilodontoidea) in having a long, straight posterior margin, a nearly straight dorsal margin, characteristic of some “Plagiaulacida”, and in having the lingual side close to the mirror image of the labial side, the character that poses difficulties in establishing whether it is a right or left tooth. Because of these differences we assign Argentodites to ?Cimolodonta, tentatively only, superfamily and family incertae sedis.

Ograniczanie wyników

5 Acta Palaeontologica Polonica

2 Kielan-Jaworowska Z.

2 Kool L.

2 Morton S.

2 Rich T. H.

2 Trusler P.

2 Vickers-Rich P.

1 Cantrill D. J.

1 Cifelli R. L.

1 Eaton J. G.

1 Evans A. R.

1 Fitzgerald E. M. G.

1 Flannery T. F.

1 Goin F. J.

1 Kear B. P.

1 Komarower P.

1 Krause D. W.

1 Nessov L. A.

1 Ortiz-Jaureguizar E.

1 Pascual R.

1 Pickering D.

1 Van Klaveren N.

1 Vieytes C.

1 White M. A.

1 2022

1 2009

1 2007

1 2001

1 1992

Multituberculate mammals from the Cretaceous of Uzbekistan

Multituberculate mammals from near the Early-Late Cretaceous boundary, Cedar Mountain Formation, Utah

Second specimen of Corriebaatar marywaltersae from the Lower Cretaceous of Australia confirms its multituberculate affinities

An Australian multituberculate and its palaeobiogeographic implications

First ? cimolodontan multituberculate mammal from South America