Ectypodus

Ectypodus is a small mammal from the Paleocene to Eocene of North America and apparently Europe. This animal 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: Ectypodus Matthew WD & Granger W, 1921
Aka: Charlesmooria ('for Charles Moor') Kühne, 1969; Parectypodus (partly)
Remarks: McKenna & Bell (1997) cites material from the Paleocene and Eocene of Europe.

Species: Ectypodus aphronorus Sloan RE, 1987
Place: Gidley Quarry, Montana & Wyoming
Country: USA
Age: Middle Paleocene
Remarks: Possibly a junior synonym of Parectypodus sylviae, which began its career as E..
Reference:

Species: Ectypodus childei (Kühne WB, 1969) Krause DW, 1982
Aka: Charlesmooria childei Kühne, 1969; Parectypodus childei Sloan RE, 1981
Place: Wyoming
Country: USA
Age: Wasatchian, Eocene
Remarks: The junior synonym, Parectypodus childei, was originally referred to P. lunatus, a citizen of Colorado. A 15g titch.
Reference:

Species: Ectypodus lovei (Sloan RE, 1966) Krishtlaka & Black, 1975
Aka: Parectypodus lovei Sloan RE, 1966
Place: Saskatchewan & Wyoming
Country: Canada & USA
Age: Uintan-Chadronian, Upper Eocene
Remarks: Weight circa 15g.
Reference:

Species: Ectypodus musculus Matthew WD & Granger, 1921
Place: Mason Pocket, Colorado
Country: USA
Age: Torrejonian, Upper Paleocene
Remarks: A macho version, weighing in at around 30g.
Reference:

Species: Ectypodus powelli Jepsen GL, 1940
Place: Princeton Quarry, Wyoming
Country: USA
Age: Torrejonian-Tiffanian, Middle-Upper Paleocene
Remarks: At least some of this material has been referred to Microcosmodon conus Jepsen, 1930. Weight guestimate, 20g.
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: Ectypodus szalayi Sloan RE, 1981
Place: New Mexico & Gidley Quarry, Montana & Wyoming
Country: USA
Age: Mid Paleocene
Remarks: 15g of furry fun.
Reference: 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.

Species: Ectypodus tardus (Jepsen GL, 1930) McKenna MC, 1960
Aka: Parectypodus tardus Jepsen, 1930
Place: Colorado & Wyoming
Country: USA
Age: Wasatchian, Eocene
Remarks: Has been cited as a descendant of E. powelli. Weighed about 15g.
References: Jepsen (1930), New vertebrate fossils from the lower Eocene of the Bighorn Basin, Wyoming. Proc. Am. Phil. Soc. LXIX, p.117-131.
McKenna (1960), Fossil Mammalia from the early Wasatchian Four Mile Fauna, Eocene of northwest Colorado. Univ. Calif. Pub. Geol. Sci. 37 (1), p.1-130.

?Ectypodus clemensi may well have become Krauseia clemensi, though I'm not certain.

Page references: Kielan-Jaworowska Z & Hurum JH (2001), Phylogeny and Systematics of multituberculate mammals. Paleontology 44, p.389-429.
McKenna MC & Bell SK, (1997), Classification of Mammals Above the Species Level. Columbia University Press.

(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)