Parectypodus

Parectypodus is a mammal genus from the Paleocene to the Eocene of North America. Some material may also be from the Upper Cretaceous. It was a member of the extinct order of Multituberculata.
For those of a technical inclination, it's within the Suborder of Cimolodonta, family Neoplagiaulacidae.

Genus: Parectypodus Jepsen GL, 1930
‘beside Ectypodus'
Aka: Ectypodus (partly); Mimetodon (partly); Neoplagiaulax (partly); "Parectypodus"; Perectypodus; Ptilodus (partly)
Remarks: P. jepseni is a junior synonym for Stygimys jepseni.

Species: Parectypodus armstrongi Johnston PA & Fox RC, 1984
Place: Rav W-1, Saskatchewan
Country: Canada
Age: Puercan, Paleocene
Remarks: Resides in the collection of Alberta University.
Reference: Johnston & Fox (1984), Paleocene and Late Cretaceous mammals from Skaksatchewan, Canada. Paleontogr. Abt. A: Paläozool., Stratigr. 186, p.163-222.

Species: Parectypodus foxi Storer JE, 1991
Place:
Country:
Age: Maastrichtian, Upper Cretaceous br> Remarks: Estimated to have weighed about 80g.
Reference:

Species: Parectypodus laytoni (JepsenGL, 1940) Sloan RE, 1966
Aka: Ectypodus laytoni Jepsen, 1940
Place: Princeton Quarry, Wyoming
Country: USA
Age: lower Tiffanian, Middle-Upper Paleocene
Remarks: Has been cited as a descendant of P. sinclairi. A mini representative of perhaps 10g.
Reference: Jepsen (1940), Paleocene faunas of the Polecat Bench formation, Park County, Wyoming. Pro. Amer. Philos. Soc, 83, p.217-340, 21 figs., 5pls.

Species: Parectypodus lunatus Krause DW, 1982
Aka: P. childei (Kühne, 1969)
Place: Pocket Quarry, Colorado & Wyoming
Country: USA
Age: Wasatchian, Lower Eocene
Remarks: A late species with a weight of something like 35g.
Reference: Jepsen (1930), New vertebrate fossils from the lower Eocene of the Bighorn Basin, Wyoming. Proc. Am. Phil. Soc. LXIX, p.117-131.

Species: Parectypodus sinclairi (Lamb, 1902) Clemens, 1964a
Aka: Ectypodus sinclairi Simpson, 1935; Ptilodus sinclairi Simpson, 1935d
Place: Gidley Quarry, Montana & Wyoming & Alberta
Country: USA & Canada
Age: Puercan-Torrejonian, Paleocene
Remarks: Has been cited as having derived from Mesodma formosa. A smallish species of about 15g, which might also go under the name of Liotomus sinclairi.
Reference: Simpson (1935), New Paleocene mammals from the Fort Union of Montana. Proc. US Nation. Museum 83, p.221-244.

Species: Parectypodus sloani Schiebout JA, 1974
Aka: Ectypodus sloani
Place: Big Bend, Texas
Country: USA
Age: Torrejonian, Paleocene
Remarks:
Reference: Schiebout (1974), Vertebrate paleontology and paleoecology of Paleocene Black Peaks Formation, Big Bend National Park, Texas. Texas Memorial Museum Bull. 24: 1-87.

Species: Parectypodus sylviae (Rigby JK, 1980) Sloan, 1987
Aka: Ectypodus sylviae Rigby JK, 1980; ?Ectypodus aphronorus Sloan RE, 1987; P. Pattersoni Sloan, 1987 Place: Swain Quarry, Montana & Wyoming
Country: USA
Age: Torrejonian, Paleocene
Remarks: Body weight guestimate, 15g. In 1998, Secord synonymized pattersoni with sylviae.
Reference:

Species: Parectypodus trovessartianus (Cope ED, 1882) Van Valen & Sloan, 1966
Aka: Mimetodon trouessartianus Jepsen, 1940; Neoplagiaulax trouessarti; "P. trouessarti"; Ptilodus trouessarti; Ptilodus trouessartianus Cope, 1882
Place: San Juan Basin, New Mexico
Country: USA
Age: Puercan-Torrejonian, Paleocene
Remarks: Body mass of around 90g.
Reference:

Page reference: Kielan-Jaworowska Z & Hurum JH (2001), Phylogeny and Systematics of multituberculate mammals. Paleontology 44, p.389-429.

(This information has been derived from [1] (http://home.arcor.de/ktdykes/ptilodon.htm) MESOZOIC MAMMALS; Ptilodontoidea, an internet directory. As that's my webpage, there are no issues of copyright. Trevor Dykes)