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Ischyromyidae

Mammalia - Rodentia - Ischyromyidae

Synonymy list
YearName and author
1876Ischyromyidae Alston
1891Ischyromyidae Flower and Lydekker p. 91
1902Ischyromyidae Hay p. 723
1908Ischyromyidae Lambe
1958Ischyromyidae Wood p. 172
1997Ischyromyidae McKenna and Bell
2007Ischyromyidae Dunn and Rasmussen p. 988
2014Ischyromyidae Korth p. 374
2020Ischyromyidae Lofgren et al.
2022Ischyromyidae Korth et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
RankNameAuthor
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
familyIschyromyidaeAlston 1876
familyIschyromyidaeAlston 1876

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Fm. †Ischyromyidae Alston 1876
show all | hide all
G. †Acritoparamys Korth 1984
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†Acritoparamys atavus Jepsen 1937
†Acritoparamys atwateri Loomis 1907
+
Invalid names: Paramys annectens Rose 1981 [synonym]
†Acritoparamys wutui Tong and Dawson 1995
Subfm. †Ailuravinae Michaux 1968
+
G. †Ailuravus Rütimeyer 1891
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†Ailuravus macrurus Weitzel 1949
†Ailuravus michauxi Hartenberger 1975
†Ailuravus mitchelli Hooker 2010
†Ailuravus picteti Rütimeyer 1891
†Ailuravus subita Comte et al. 2012
Invalid names: Aeluravus Stehlin and Schaub 1951 [synonym], Maurimontia Stehlin and Schaub 1951 [synonym], Palaeomarmota Haupt 1921 [synonym]
G. †Eohaplomys Stock 1935
+
†Eohaplomys matutinus Stock 1935
†Eohaplomys serus Stock 1935
†Eohaplomys tradux Stock 1935
G. †Euromys Escarguel 1999
+
†Euromys cardosoi Estravís 2000
G. †Meldimys Michaux 1968
+
†Meldimys musak Rana et al. 2008
G. †Mytonomys Wood 1956
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†Mytonomys burkei Wilson 1940
†Mytonomys coelumensis Wilson and Stevens 1986
+
Invalid names: Leptotomus loomisi Wood 1962 [synonym]
†Mytonomys gaitania Ferrusquia and Wood 1969
†Mytonomys mytonensis Wood 1962
†Mytonomys robustus Peterson 1919
+
Invalid names: Leptotomus kayi Burke 1934 [synonym]
†Mytonomys wortmani Wood 1962
G. †Apatosciuravus Korth 1984
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†Apatosciuravus bifax Korth 1984
†Apatosciuravus jacobsi Flanagan 1986
G. †Churcheria Storer 2002
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†Churcheria baroni Storer 1988
Invalid names: Anonymus Storer 1988 [synonym]
G. †Decticadapis Lemoine 1891
G. †Hulgana Dawson 1962
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†Hulgana eoertinia Tong 1997
Subfm. †Ischyromyinae Schlosser 1911
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G. †Eosischyromys Wang et al. 1998
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†Eosischyromys youngi Wang et al. 1998
G. †Proischyromys Samuels and Korth 2017
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†Proischyromys perditus Samuels and Korth 2017
G. †Ischyromys Leidy 1856
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†Ischyromys blacki Wood 1974
†Ischyromys brevidens Korth et al. 2022
†Ischyromys douglassi Black 1968
†Ischyromys junctus Russell 1972
†Ischyromys typus Leidy 1856
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Invalid names: Colotaxis cristatus Cope 1873 [synonym], Gymnoptychus chrysodon Cope 1873 [synonym], Ischyromys pliacus Troxell 1922 [synonym], Ischyromys troxelli Wood 1937 [synonym], Ischyromys typus lloydi Troxell 1922 [invalid subgroup]
†Ischyromys veterior Matthew 1903
+
Invalid names: Titanotheriomys wyomingensis Wood 1937 [synonym]
Invalid names: Colotaxis Cope 1873 [synonym], Gymnoptychus Cope 1873 [synonym], Ischyromys parvidens Miller and Gidley 1920 [nomen dubium], Ischyromys typus nanus Troxell 1922 [nomen dubium], Titanotheriomys Miller and Gidley 1920 [synonym]
G. †Leptotomus Matthew 1910
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†Leptotomus caryophilus Wilson 1940
†Leptotomus guildayi Black 1971
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Invalid names: Prosciurus major Russell 1972 [synonym]
†Leptotomus parvus Wood 1959
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Invalid names: Leptotomus bridgerensis Wood 1962 [synonym]
G. †Lophiparamys Wood 1962
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†Lophiparamys murinus Matthew 1918
†Lophiparamys woodi Guthrie 1971
Subfm. †Microparamyinae Wood 1962
+
G. †Hartenbergeromys Escarguel 1999
G. †Masillamys Tobien 1954
G. †Mattimys Korth 1984
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†Mattimys kalicola Matthew 1918
G. †Microparamys Wood 1959
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†Microparamys bayi Dawson 2001
†Microparamys chandoni Hartenberger 1971
†Microparamys dubius Wood 1949
†Microparamys hottingeri Marandat 1989
†Microparamys lingchaensis Li et al. 1979
†Microparamys minutus Wilson 1937
†Microparamys nanus Teilhard de Jardin 1927
†Microparamys nimius Storer 1988
†Microparamys paisi Estravís 1994
†Microparamys sambucus Korth and Emry 1989
†Microparamys solidus Storer 1984
†Microparamys solis Dawson and Constenius 2018
†Microparamys tricus Wilson 1940
†Microparamys woodi Kelly and Whistler 1994
G. †Pantrogna Hartenberger 1971
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†Pantrogna marandati Escarguel 1999
†Pantrogna russelli Michaux 1964
G. †Sparnacomys Hartenberger 1971
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†Sparnacomys chandoni Hartenberger 1971
†Sparnacomys georgei Hooker 2010
G. †Strathcona Dawson 2001
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†Strathcona major Dawson 2001
†Strathcona minor Dawson 2001
G. †Notoparamys Korth 1984
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†Notoparamys arctios Korth 1984
†Notoparamys blochi Gunnell et al. 2016
†Notoparamys costilloi Wood 1962
Subfm. †Paramyinae Simpson 1945
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G. †Abrosomys Shevyreva 1984
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†Abrosomys agasma Shevyreva 1984
Tr. †Manitshini Simpson
+
G. †Manitsha Simpson 1941
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†Manitsha tanka Simpson 1941
G. †Plesiarctomys Bravard 1848
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†Plesiarctomys curranti Hooker 1986
†Plesiarctomys gervaisii Bravard 1850
G. †Pseudotomus Cope 1872
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†Pseudotomus californicus Wilson 1940
†Pseudotomus eugenei Burke 1935
†Pseudotomus hians Cope 1872
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Invalid names: Paramys superbus Osborn et al. 1878 [synonym]
†Pseudotomus littoralis Wilson 1949
†Pseudotomus petersoni Matthew 1910
†Pseudotomus robustus Marsh 1872
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Invalid names: Ischyrotomus oweni Wood 1962 [synonym]
†Pseudotomus timmys Storer 1988
Invalid names: Ischyrotomus Matthew 1910 [synonym]
G. †Metaparamys Korth and Emry 2007
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†Metaparamys dawsonae Korth and Emry 2007
Tr. †Paramyini Simpson 1945
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G. †Quadratomus Korth 1984
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†Quadratomus gigans Wood 1974
†Quadratomus grandis Wood 1962
†Quadratomus grossus Korth 1985
†Quadratomus sundelli Eaton 1982
G. †Paramys Leidy 1871
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†Paramys adamus Dawson and Beard 1996
†Paramys compressidens Peterson 1919
†Paramys copei Loomis 1907
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Invalid names: Paramys bicuspis Loomis 1907 [synonym], Paramys major Loomis 1907 [synonym], Paramys primaevus Loomis 1907 [synonym], Paramys quadratus Loomis 1907 [synonym]
†Paramys delicatior Leidy 1871
†Paramys delicatus Leidy 1871
†Paramys dispar Beard and Dawson 2009
†Paramys excavatus Loomis 1907
+
Invalid names: Franimys lysitensis Guthrie 1967 [synonym]
†Paramys hunti Dawson 2001
†Paramys leptodus Cope 1873
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Invalid names: Paramys grangeri Matthew 1910 [synonym]
†Paramys nini Wood 1962
†Paramys obailensis Shevyreva 1984
†Paramys pourcyensis Michaux 1964
†Paramys pycnus Ivy 1990
†Paramys savagei Micheau 1964
†Paramys simpsoni Korth 1984
†Paramys taurus Korth 1984
†Paramys wyomingensis Wood 1959
+
Invalid names: Reithroparamys matthewi Wood 1962 [synonym]
Subfm. †Pseudoparamyinae Michaux 1964
+
G. †Patriarchamys Harrison 2006
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†Patriarchamys batesi Harrison 2006
G. †Rapamys Wilson 1940
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†Rapamys atramontis Wahlert et al. 2006
†Rapamys fricki Wilson 1940
†Rapamys wilsoni Black 1971
G. †Tapomys Wood 1962
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†Tapomys tapensis Wilson 1940
G. †Thisbemys Wood 1959
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†Thisbemys brevicrista Ostrander 1986
†Thisbemys corrugatus Wood 1959
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Invalid names: Thisbemys plicatus Wood 1962 [synonym]
†Thisbemys elachistos Korth 1984
†Thisbemys medius Peterson 1919
†Thisbemys perditus Wood 1962
+
Invalid names: Leptotomus huerfanensis Wood 1962 [synonym]
†Thisbemys uintensis Osborn 1895
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Maximum body mass: 1 kgg
Minimum body mass: 1 kgg
Body mass estimate: 1 kg
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: herbivoreo
Reproduction: viviparoussubc
Created: 2005-08-26 14:04:46
Modified: 2005-08-26 16:04:46
Source: g = genus, o = order, subc = subclass, c = class, subp = subphylum
References: Carroll 1988, Ji et al. 2002, Lillegraven 1979, Nowak 1999, Hendy et al. 2009, Legendre 1988

Age range: base of the Ypresian to the top of the Whitneyan or 56.00000 to 30.80000 Ma

Collections (668 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Late/Upper Paleocene58.7 - 55.8France (Oise) Ischyromyidae indet. (166598)
Late/Upper Paleocene - Early/Lower Eocene58.7 - 48.6USA (Wyoming) Microparamys cheradius (80579)
Clarkforkian56.2 - 54.9USA (Wyoming) Acritoparamys atavus (190416) Acritoparamys atwateri (239208) Acritoparamys atwateri, Microparamys cheradius, Paramys taurus, Microparamys sp. (15085) Ischyromyidae indet., Paramys excavatus (15092) Paramys annectens (15197) Paramys atavus (15072) Paramys sp. (15075 15083 15094) Rodentia indet. (15216)
Clarkforkian56.2 - 54.9USA (Montana) Paramys atavus (15079)
Clarkforkian56.2 - 54.9USA (Colorado) Paramys excavatus, Reithroparamys sp. (15346 15347)
Ypresian56.0 - 47.8United Kingdom (England) Ailuravinae indet., Microparamyinae indet. (174239) Meldimys sp., Ailuravinae indet., Sparnacomys sp., Ailuravus mitchelli, Sparnacomys georgei, Pantrogna russelli (38868) Pantrogna mandati (68439) Paramys sp., Meldimys sp., Microparamys nanus (133368)
Ypresian56.0 - 47.8Spain (Lleida) I. sp. (142031)
Ypresian56.0 - 47.8Belgium (Brabant) Paramys anacingularis, Paramys sp., Meldimys sp., Euromys metacingularis, Microparamys nanus (35531)
Ypresian56.0 - 47.8France Ischyromyidae indet. (182667)
Ypresian56.0 - 47.8France (Marne) Ailuravus michauxi (35539) Pantrogna russelli (35533)

Youngest occurrences
Time interval Ma Country or state PBDB collection number
Late/Upper Chadronian - Orellan37.2 - 33.3USA (Nebraska) Ischyromys brevidens (230806)
Late/Upper Eocene - Early/Lower Oligocene37.2 - 28.4China (Henan) Ischyromyidae indet. (174738)
Orellan33.9 - 33.3USA (Colorado) Ischyromys typus (17082) Ischyromys typus, Titanotheriomys sp. (17081)
Orellan33.9 - 33.3USA (South Dakota) Ischyromys parvidens (17162) Ischyromys pliacus (17115) Ischyromys sp. (17153 17186 17187 17188 17189 17190 17198 163487) Ischyromys sp., Manitsha tanka (17136) Ischyromys troxelli (17179) Ischyromys typus (17094 17102 17103 17133 17173 17174 17182 17295) Rodentia indet. (17089)
Orellan33.9 - 33.3USA (Wyoming) Ischyromys parvidens (17104 17105 17106) Ischyromys pliacus (17086)
Orellan33.9 - 33.3USA (Nebraska) Ischyromys lloydi (17150) Ischyromys parvidens (17098 17203 17225 17226 17231 17235 17247 17255 17256 17271 17273 17279 17282 17283) Ischyromys pliacus (17242 17244 17250) Ischyromys typus (17062 17108 17164 17165 17212 17216 17223 17249 17253 17257 17275 17287 17297)
Orellan33.9 - 33.3USA (Montana) Ischyromys sp. (17090)
Orellan33.9 - 33.3USA (North Dakota) Ischyromys sp. (17301) Ischyromys typus (17100 17101)
Whitneyan33.3 - 30.8USA (South Dakota) Ischyromys pliacus (17336) Ischyromys sp. (17384) Ischyromys typus (170168)
Whitneyan33.3 - 30.8USA (Nebraska) Ischyromys sp. (17414) Ischyromys typus (17427)