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Pseudotomus ✝

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Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	3240709	https://www.gbif.org/species/3240709
PaleoBioDB ID (PBDB)	41410	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=41410

Rank

genus

Taxonomy (GBIF,PBDB)

Life : Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : Pseudotomus

Taxonomic Status (GBIF)

accepted

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Triploblastica	Lankester 1877
-	Nephrozoa	Jondelius et al. 2002
-	Deuterostomia	Grobben 1908
phylum	Chordata	Haeckel 1847
subphylum	Vertebrata	Lamarck 1801
superclass	Gnathostomata	Gegenbauer 1874
-	Osteichthyes
-	Sarcopterygii	Romer 1955
subclass	Dipnotetrapodomorpha
subclass	Tetrapodomorpha
-	Tetrapoda
-	Reptiliomorpha	Säve-Söderbergh 1934
-	Anthracosauria	Säve-Söderbergh 1934
-	Batrachosauria
-	Cotylosauria
-	Amniota	Haeckel 1866
-	Synapsida	Osborn 1903
-	Therapsida
infraorder	Cynodontia
-	Epicynodontia	Hopson and Kitching 2001
infraorder	Eucynodontia	Kemp 1982
-	Probainognathia	Hopson 1990
-	Mammaliamorpha	Rowe 1988
-	Mammaliaformes	Rowe 1988
class	Mammalia	Linnaeus 1758
subclass	Tribosphenida
infraclass	Eutheria
-	Placentalia	Owen 1837
-	Euarchontoglires	Murphy et al. 2001
-	Glires
order	Rodentia
family	Ischyromyidae	Alston 1876
subfamily	Paramyinae	Simpson 1945
tribe	Manitshini	Simpson
genus	Pseudotomus	Cope 1872

Scientific Name

Pseudotomus Cope, 1872

Name Published In

Proc. Amer. Phil. Soc., 12

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Pseudotomus	genus	belongs to Ischyromyidae	stated without evidence	Cope, 1872
Pseudotomus	genus	subjective synonym of Plesiarctomys	stated without evidence	Cope, 1881
Pseudotomus	genus	subjective synonym of Paramys	stated without evidence	Roger, 1896
Pseudotomus	subgenus	belongs to Paramys	stated without evidence	Matthew, 1910
Pseudotomus	genus	belongs to Ischyromyidae	stated without evidence	Wilson, 1940
Pseudotomus	genus	belongs to Manitshinae	stated without evidence	Wood, 1962
Pseudotomus	genus	belongs to Ischyromyidae	implied	McKenna and Bell, 1997
Pseudotomus	genus	belongs to Manitshini	stated with evidence	Dunn and Rasmussen, 2007

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

50.3 - 46.2 Ma
Eocene

Last Recorded Appearance

37.2 - 33.9 Ma
Paleogene

Environment

terrestrial (based on Eutheria)

Motility

actively mobile (based on Osteichthyes)

Diet

herbivore (based on Rodentia)

Ecospace Comments

P. eugenei was "a generalized terrestrial rodent that would have been able to dig and run" and was not arboreal, and P. robustus was "even more generalized" and larger than extant arboreal rodents, although it "sometimes closely resembles arboreal taxa in morphology"

Taphonomy

phosphatic (based on Vertebrata)

Primary Reference (PBDB)

E. D. Cope. 1872. Second account of new Vertebrata from the Bridger Eocene. Proceedings of the American Philosophical Society (separate)

Fossil Distribution

Subtaxa

Name	Status	Fossil Occurrences	Oldest	Youngest
Ischyrotomus californicus ✝ species	accepted (GBIF) listed (PBDB)	1	46.2 Ma Eocene	46.2 Ma Eocene
Ischyrotomus eugenei ✝ species	accepted (GBIF) listed (PBDB)	5	46.2 Ma Eocene	46.2 Ma Eocene
Ischyrotomus horribilis ✝ species	accepted (GBIF) listed (PBDB)	1	50.3 Ma Eocene	50.3 Ma Eocene
Ischyrotomus littoralis ✝ species	accepted (GBIF) listed (PBDB)	1	46.2 Ma Eocene	46.2 Ma Eocene
Manitsha johanniculi ✝ species	accepted (GBIF) listed (PBDB)	3	46.2 Ma Eocene	37.2 Ma Eocene
Paramys petersoni ✝ species	accepted (GBIF) listed (PBDB)	4	46.2 Ma Eocene	40.4 Ma Eocene
Paramys robustus ✝ species	accepted (GBIF) listed (PBDB)	13	50.3 Ma Eocene	50.3 Ma Eocene
Pseudotomus hians ✝ species	accepted (GBIF) listed (PBDB)	1	50.3 Ma Eocene	50.3 Ma Eocene
Pseudotomus timmys ✝ species	accepted (GBIF) listed (PBDB)	1	40.4 Ma Eocene	40.4 Ma Eocene

Obsolete Names

Name	Source	Taxon Rank	Taxonomy
Ischyrotomus (Matthew, 1910)	GBIF	genus	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : *Ischyrotomus*
Pseudotomys Alston, 1876	GBIF	genus	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : *Pseudotomys*
Pseudomys Allen, 1879	GBIF	genus	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : *Pseudomys*

Synonymy List

Year	Name and Author
1872	Pseudotomus Cope
1910	Paramys (Ischyrotomus) Matthew
1910	Paramys (Pseudotomus) Matthew
1919	Ischyrotomus Matthew and Gidley
1919	Ischyrotomus Peterson p. 63
1940	Pseudotomus Wilson

Year	Name and Author
1962	Pseudotomus Wood
1985	Pseudotomus Korth
1997	Ischyrotomus McKenna and Bell
1997	Pseudotomus McKenna and Bell
2007	Pseudotomus Dunn and Rasmussen p. 988

References

Cope E. D. Second account of new Vertebrata from the Bridger Eocene, Proceedings of the American Philosophical Society (separate), 1-3

Matthew W. D. (1910) On the osteology and relationships of Paramys, and the affinities of the Ischyromyidae, Bulletin of the American Museum of Natural History 28 6, 43-72

Peterson O. A. (1919) Report Upon the Material Discovered in the Upper Eocene of the Uinta Basin by Earl Douglas in the Years 1908-1909, and by O. A. Peterson in 1912, Annals of Carnegie Museum 12 2, 40-168

Wilson R. W. (1940) Californian paramyid rodents, Carnegie Institution of Washington Publication 514 5, 59-84

Wood A. E. (1962) The Early Tertiary Rodents of the Family Paramyidae, Transactions of the American Philosophical Society 52 1, 3-261 doi:10.2307/1005914

Korth W. W. (1985) The Rodents Pseudotomus and Quadratomus and the Content of the Tribe Manitshini (Paramyinae, Ischyromyidae), Journal of Vertebrate Paleontology 5 2, 139-152

McKenna M. C., Bell S. K. (1997) , Classification of Mammals Above the Species Level, 1-640

Dunn R. H., Rasmussen D. T. (2007) Skeletal morphology and locomotor behavior of Pseudotomus eugenei (Rodentia, Paramyinae) from the Uinta Formation, Utah, Journal of Vertebrate Paleontology 27 4, 987-1006

Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera

SN2000/McKenna & Bell, 1997 - via The Interim Register of Marine and Nonmarine Genera

SN2000: Brands, S. J. (compiler) 1989-2005. Systema Naturae 2000. Amsterdam, The Netherlands (2006 version). Available online at http://sn2000.taxonomy.nl/. - via The Interim Register of Marine and Nonmarine Genera

as per family - via The Interim Register of Marine and Nonmarine Genera

Proc. Amer. Phil. Soc., 12 - via The Interim Register of Marine and Nonmarine Genera

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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