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Ischyromyidae
Taxonomy
Ischyromyidae was named by Alston (1876). It is not extant.
It was assigned to Sciuromorpha by Hay (1902); to Simplicidentata by Flower and Lydekker (1891) and Lambe (1908); to Protrogomorpha by Wood (1958); to Protrogomorpha by McKenna and Bell (1997); to Sciuromorpha by Dunn and Rasmussen (2007); and to Rodentia by Korth (2014), Lofgren et al. (2020) and Korth et al. (2022).
It was assigned to Sciuromorpha by Hay (1902); to Simplicidentata by Flower and Lydekker (1891) and Lambe (1908); to Protrogomorpha by Wood (1958); to Protrogomorpha by McKenna and Bell (1997); to Sciuromorpha by Dunn and Rasmussen (2007); and to Rodentia by Korth (2014), Lofgren et al. (2020) and Korth et al. (2022).
Subtaxa
Synonymy list
Year | Name and author |
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1876 | Ischyromyidae Alston |
1891 | Ischyromyidae Flower and Lydekker p. 91 |
1902 | Ischyromyidae Hay p. 723 |
1908 | Ischyromyidae Lambe |
1958 | Ischyromyidae Wood p. 172 |
1997 | Ischyromyidae McKenna and Bell |
2007 | Ischyromyidae Dunn and Rasmussen p. 988 |
2014 | Ischyromyidae Korth p. 374 |
2020 | Ischyromyidae Lofgren et al. |
2022 | Ischyromyidae Korth et al. |
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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
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G. †Acritoparamys Korth 1984
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†Acritoparamys atavus Jepsen 1937
†Acritoparamys francesi Wood 1962
†Acritoparamys pattersoni Wood 1962
†Acritoparamys wutui Tong and Dawson 1995
Subfm. †Ailuravinae Michaux 1968
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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 stehlinschaubi Wood 1976
†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
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†Eohaplomys matutinus Stock 1935
†Eohaplomys serus Stock 1935
†Eohaplomys tradux Stock 1935
G. †Mytonomys Wood 1956
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†Mytonomys burkei Wilson 1940
†Mytonomys coelumensis Wilson and Stevens 1986
†Mytonomys gaitania Ferrusquia and Wood 1969
†Mytonomys mytonensis Wood 1962
†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
Subfm. †Ischyromyinae Schlosser 1911
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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]
Invalid names: Colotaxis Cope 1873 [synonym], Gymnoptychus Cope 1873 [synonym], Ischyromys parvidens Miller and Gidley 1920 [nomen dubium], Ischyromys typus lloydi Troxell 1922 [invalid subgroup], Ischyromys typus nanus Troxell 1922 [nomen dubium], Titanotheriomys Miller and Gidley 1920 [synonym]
G. †Lophiparamys Wood 1962
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†Lophiparamys debequensis Wood 1962
†Lophiparamys murinus Matthew 1918
†Lophiparamys woodi Guthrie 1971
Subfm. †Microparamyinae Wood 1962
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G. †Hartenbergeromys Escarguel 1999
G. †Masillamys Tobien 1954
G. †Microparamys Wood 1959
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†Microparamys bayi Dawson 2001
†Microparamys chandoni Hartenberger 1971
†Microparamys cheradius Ivy 1990
†Microparamys dubius Wood 1949
†Microparamys hottingeri Marandat 1989
†Microparamys hunterae Ivy 1990
†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 perfossus Wood 1974
†Microparamys sambucus Korth and Emry 1989
†Microparamys scopaiodon Korth 1984
†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. †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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Tr. †Manitshini Simpson
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G. †Plesiarctomys Bravard 1848
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†Plesiarctomys curranti Hooker 1986
†Plesiarctomys gervaisii Bravard 1850
†Plesiarctomys hartenbergeri Wood 1970
†Plesiarctomys huerzeleri Wood 1970
G. †Pseudotomus Cope 1872
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†Pseudotomus californicus Wilson 1940
†Pseudotomus eugenei Burke 1935
†Pseudotomus horribilis Wood 1962
†Pseudotomus johanniculi Wood 1974
†Pseudotomus littoralis Wilson 1949
†Pseudotomus petersoni Matthew 1910
†Pseudotomus timmys Storer 1988
Invalid names: Ischyrotomus Matthew 1910 [synonym]
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 hunti Dawson 2001
†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
Subfm. †Pseudoparamyinae Michaux 1964
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G. †Rapamys Wilson 1940
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†Rapamys atramontis Wahlert et al. 2006
†Rapamys fricki Wilson 1940
†Rapamys wilsoni Black 1971
G. †Thisbemys Wood 1959
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†Thisbemys brevicrista Ostrander 1986
†Thisbemys elachistos Korth 1984
†Thisbemys medius Peterson 1919
†Thisbemys uintensis Osborn 1895
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: g = genus, o = order, subc = subclass, c = class, subp = subphylum | |||||
References: Ji et al. 2002, Lillegraven 1979, Nowak 1999, Carroll 1988, Hendy et al. 2009, Legendre 1988 |
Age range
Maximum range based only on fossils: base of the Ypresian to the top of the Whitneyan or 56.00000 to 30.80000 Ma
Minimum age of oldest fossil (stem group age): 55.8 Ma
Minimum age of oldest fossil (stem group age): 55.8 Ma
Collections (667 total)
Oldest occurrences | |||
Time interval | Ma | Country or state | Original ID and collection number |
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Late/Upper Paleocene | France (Oise) | Ischyromyidae indet. (166598) | |
Late/Upper Paleocene - Early/Lower Eocene | USA (Wyoming) | Microparamys cheradius (80579) | |
Clarkforkian | USA (Colorado) | Paramys excavatus, Reithroparamys sp. (15346 15347) | |
Clarkforkian | USA (Montana) | Paramys atavus (15079) | |
Clarkforkian | USA (Wyoming) | Acritoparamys atavus (190416) 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) | |
Ypresian | France | Ischyromyidae indet. (182667) | |
Ypresian | Spain (Lleida) | I. sp. (142031) | |
Ypresian | United 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) | |
Ypresian | United Kingdom | Paramys sp., Meldimys sp. (87950) | |
Ypresian | Belgium (Brabant) | Paramys anacingularis, Paramys sp., Meldimys sp., Euromys metacingularis, Microparamys nanus (35531) | |
Ypresian | France (Île-de-France) | Microparamys n. sp., Paramys woodi, Paramys sp. (68437) | |
Ypresian | France (Marne) | Ailuravus michauxi (35539) Pantrogna russelli (35533) | |
Ypresian | Belgium (Hainaut) | Euromys sp. (87947) | |
Ypresian | India (Gujarat) | Meldimys sp. (180565) Meldimys sp., Ailuravinae indet. (55494) | |
Ypresian | France (Oise) | Ischyromyidae indet. (68174) | |
Ypresian - Lutetian | France (Languedoc-Roussillon) | Microparamys sp. (182519) | |
Ypresian - Lutetian | France (Languedoc-Roussillon Region) | Microparamys sp. (31717) | |
Ypresian - Lutetian | France (Occitanie) | Ailuravus michauxi (195457) | |
Eocene | USA (California) | Leptotomus sp. (16816) | |
Graybullian | USA (Wyoming) | Acritoparamys atwateri, Microparamys cheradius, Paramys copei, Paramys taurus (15701) |