Neoplagiaulax


Neoplagiaulax is a mammal genus from the Paleocene of Europe and North America. In the case of the latter continent, there may possibly be some slightly earlier, Upper Cretaceous material too. It existed in the age immediately following the extinction of the last dinosaurs. This animal was a member of the extinct order Multituberculata, lying within the suborder Cimolodonta and family Neoplagiaulacidae.
The genus Neoplagiaulax was named by Lemoine V. in 1882.

Species

  • Neoplagiaulax annae has been found in Paleocene strata of Cernay, France.
  • ?Neoplagiaulax burgessi has been found in Maastrichtian strata of Hell Creek, USA.
  • Neoplagiaulax copei has been found in Paleocene strata of Cernay, France. It has been cited as a possible descendant of N. hazeni.
  • Neoplagiaulax donaldorum found in early Tiffanian strata in eastern Crazy Mountains, Montana.
  • Neoplagiaulax eocaenus is also known as N. eocänus and Plagiaulax eocaenus. It was found in Upper Paleocene of Cernay, France. It has also been cited as a possible descendant of N. hazeni.
  • Neoplagiaulax grangeri is also known as Ectypodus? grangeri. It was found in Torrejonian of Gidley Quarry, Montana. It was a further possible descendant of N. hazeni. Its weight was around 100 g, a quarter of that of a standard rat.
  • Neoplagiaulax hazeni is also known as Ectypodus hazeni and N. fractus. It is known from the Tiffanian of Princeton Quarry, Wyoming and North Dakota. Its body weight has been estimated at 95 g. Further material, including the type fossil, can be visited at the Peabody [Museum of Natural History] at Yale University.
  • Neoplagiaulax hunteri, is also known as Ectypodus hunteri.It was discovered in Torrejonian-Tiffanian strata of Scarritt Quarry in Montana, Wyoming and North Dakota and Alberta, Canada. Several specimens are at the Peabody Museum of Yale, where the name E. is sometimes employed. It likely weighed about 45 g.
  • Neoliotomus jepi is known from the Tiffanian of Cedar Point Quarry, Wyoming.
  • Neoplagiaulax kremnus was found in Puercan strata of Rav W-1 in Saskatchewan, Canada. The holotype is in the collection of the University of Alberta.
  • Neoplagiaulax macintyrei was found in Puercan San Juan Basin of New Mexico and Utah.
  • Neoliotomus macrotomeus is also known as Ectypodus macrotomeus strata of the San Juan Basin of New Mexico. It is possibly derived from Mesodma formosa. It weighed about 15 g.
  • Neoplagiaulax mckennai is also known as N. mckennaiai. It was found in Tiffanian strata of Love Quarry in Wyoming and North Dakota. It weighed an estimated 60 g.
  • Neoplagiaulax nelsoni was discovered in the Puercan-Torrejonian strata of Wyoming and Purgatory Hill of Montana and Alberta. The type fossil is from Keefer Hill Wyoming. This species was mouse-sized, weighing about 25 g.
  • Neoplagiaulax nicolai was discovered in Paleocene strata of Cernay, France.
  • Neoplagiaulax sylvani was found in Paleocene strata of Cernay, France.