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Neoplagiaulax
- N. annae
- ?N. burgessi
- N. copei
- N. eocaenus
- N. grangeri
- N. hazeni
- N. hunteri
- N. jepi
- N. kremnus
- N. macintyrei
- N. macrotomeus
- N. mckennai
- N. nelsoni
- N. nicolai
- N. sylvani
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 is a member of the family Neoplagiaulacidae. The genus Neoplagiaulax ("new Plagiaulax") was named by Lemoine V. in 1882. It is also known as Ectypodus? (partly); Plagiaulax (partly); Ptilodus (partly). This is something of a nomenclatural minefield. Some material has also been reassigned to Eucosmodon. Species The species Neoplagiaulax annae (Vianey-Liaud M, 1986) has been found in the Paleocene of Cernay, France Species: ?Neoplagiaulax burgessi (Archibald J.D., 1982)
Place: Maastrichtian (Upper Cretaceous) of Hell Creek (USA)
Species: Neoplagiaulax copei (Lemoine V., 1885)
Place: Paleocene of Cernay, France. It has been cited as a possible descendant of N. hazeni. Species: Neoplagiaulax eocaenus (Lemoine V, 1880)
Aka: N. eocnus, Plagiaulax eocaenus
Place: Upper Paleocene of Cernay, France. It has also been cited as a possible descendant of N. hazeni. Species: Neoplagiaulax grangeri (Simpson G.G., 1935) Gazin, 1969
Also known as Ectypodus? grangeri (Simpson, 1935)
Place: Torrejonian (Paleocene) of Gidley Quarry, Montana (USA). It was a further possible descendant of N. hazeni. Its weight was around 100 g, a quarter of that of a standard rat. Species: Neoplagiaulax hazeni (Jepsen G.L., 1940; Krause D.W., 1977)
Also known as Ectypodus hazeni Jepsen GL, 1940; N. fractus (partially)
It iw known from the Tiffanian (Middle-Upper Paleocene) of Princeton Quarry, Wyoming & North Dakota (USA). Its body weight has been estimated at 95 g. Further material, including the type fossil, can be visited at the Peabody Museum, Yale. Species: Neoplagiaulax hunteri (Simpson G.G., 1936) Krause DW, 1977
Also known as Ectypodus hunteri (Simpson, 1936)
Place: Scarritt Quarry, Montana and Wyoming and North Dakota & Alberta
Age: Torrejonian-Tiffanian (Middle Paleocene)
Several specimens are at the Peabody Museum, Yale, where the name E. is sometimes employed. It weighed about 45g. The species Neoliotomus jepi (Sloan R.E., 1987) is known from the Tiffanian (Paleocene) of Cedar Point Quarry, Wyoming (USA) Species: Neoplagiaulax kremnus (Johnston P.A. & Fox R.C., 1984)
Place: Puercan (Lower Paleocene) of Rav W-1, Saskatchewan, Canada. The holotype in the collection of Alberta University. Species: Neoplagiaulax macintyrei (Sloan R.E., 1981)
Place: San Juan Basin, New Mexico & Utah (USA)
Age: Puercan, Lower Paleocene Species: Neoliotomus macrotomeus (Wilson, 1956; Sloan, 1987(
Also known as Ectypodus macrotomeus (Wilson, 1956)
Place: San Juan Basin, New Mexico (USA)
Age: Puercan-Torrejonian (Lower Paleocene)
Possibly derived from Mesodma formosa. It weighed about 15 g
Species: Neoplagiaulax mckennai (Sloan R.E., 1987)
Also known as N. mckennaiai
Place: Love Quarry, Wyoming & North Dakota
Age: Tiffanian (Middle-Upper Paleocene)
Weight estimate, 60g. Species: Neoplagiaulax nelsoni Sloan RE, 1987
Place: Wyoming & Purgatory Hill, Montana & Alberta
Country: USA and Canada
Age: Puercan-Torrejonian, Middle-Upper Paleocene
The type fossil is from Keefer Hill, (aka Shotgun), Wyoming. A mouse-sized 25g. Species: Neoplagiaulax nicolai Vianey-Liaud M, 1986
Place: Paleocene of Cernay, France. Species: Neoplagiaulax sylvani Vianey-Liaud M, 1986
Place: Paleocene of Cernay, France References - Lemoine (1885), "tude sur quelqes mammifres de petite taille de la faune cernaysienne des environs de Reims." Bull. Soc. Gol. France 3, p.203-217, pls. x-xii.
- Archibald (1982), "A study of Mammalia and Geology across the Cretaceous-Tertiary Boundary in Garfield County, Montana." University of California Publications in Geological Sciences, vol. 122, p.242-243.
- Simpson (1935), "New Paleocene mammals from the Fort Union of Montana." Proc. US Nation. Museum 83, p.221-244.
- Jepsen (1940), "Paleocene faunas of the Polecat Bench formation, Park County, Wyoming." Pro. Amer. Philos. Soc, 83, p.217-340, 21 figs., 5p ls.
- Krause (1977), "Paleocene multituberculates (Mammalia) of the Roche Percee Local Fauna, Ravenscrag Formation, Saskatchewan, Canada." Palaeontographica Abt. A 159, p.1-36.
- Johnston & Fox (1984), Paleocene and Late Cretaceous mammals from Skaksatchewan, Canada. Paleontogr. Abt. A: Palozool., Stratigr. 186, p.163-222.
- Sloan (1981), "Systematics of Paleocene multituberculates from the San Juan Basin, New Mexico," p. 127-160, in Lucas et al (eds), "Advances in San Juan Basin paleontology." University of New Mexico Press, Alberquerque.
- Kielan-Jaworowska Z & Hurum JH (2001), "Phylogeny and Systematics of multituberculate mammals." Paleontology 44, p.389-429.
- Vianey-Liaud (1986), Les Multituberculs Thantiens de France, et leurs rapports avec les Multituberculs Nord-Amricains. Palaeontogr. Abt. A: Palozool. Stratigr. 191 p.85-171, 3 plates.
- Much of this information has been derived from MESOZOIC MAMMALS; Ptilodontoidea, an Internet directory.
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