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Myocastor

Mammalia - Rodentia - Echimyidae

Synonyms
Synonymy list
YearName and author
1782Myocastor Kerr
1805Myopotamus Saint-Hilaire
1841Mastonotus Wesmael
1885Myopotamus Ameghino p. 38
1904Myocastor Ameghino
1914Myocastor Rovereto p. 132
1936Tramyocastor Rusconi
1968Myocastor Patterson and Pascual
1997Tramyocastor McKenna and Bell
2004Myocastor Carvalho and Salles
2015Myocastor Arnal and Vucetich
2015Myocastor Upham and Patterson

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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()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
RankNameAuthor
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
—CtenohystricaHuchon et al. 2000
infraorderHystricognathi(Tullberg 1899)
—Caviomorpha(Wood and Patterson 1955)
superfamilyOctodontoideaWaterhouse 1839
familyEchimyidaeGray 1825
genusMyocastorKerr 1782

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.

G. Myocastor Kerr 1782
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†Myocastor brevirostris Rusconi 1944
Myocastor coypus Molina 1782 [coypu]
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Invalid names: Mastonotus popelairi Wesmael 1841 [synonym], Myopotamus bonariensis Saint-Hilaire 1805 [synonym]
†Myocastor diligens Ameghino 1888
†Myocastor ipriscus Gervais and Ameghino 1880
†Myocastor perditus Ameghino 1902
Invalid names: Mastonotus Wesmael 1841 [synonym], Myopotamus Saint-Hilaire 1805 [synonym], Tramyocastor Rusconi 1936 [synonym]
Diagnosis
No diagnoses are available
Body mass estimates
estimateequationreference
 5.00 kg Mammalia femur diameterGingerich 1990
 4.05 kg Mammalia humerus diameterGingerich 1990
 6.55 kg Mammalia tibia diameterGingerich 1990
mean: 5.10 kg
Measurements
partNmean
Upper M2 height112.9
femur diameter19.10
humerus diameter18.40
radius diameter15.50
tibia diameter19.50

Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: amphibiousg
Diet: herbivoref
Reproduction: viviparoussubc
Comments: fossorial according to Dunn and Rasmussen 2007 but amphibious according to Gingerich 2003, in turn based on two different references, and also Samuels and Van Valkenburgh 2008g
Created: 2011-05-12 18:11:45
Modified: 2012-05-14 21:44:24
Source: g = genus, f = family, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Ji et al. 2002, Carroll 1988, Nowak 1991, Dunn and Rasmussen 2007, Hendy et al. 2009

Age range

Maximum range based only on fossils: base of the Huayquerian to the top of the Holocene or 8.00000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 5.0 Ma

Collections (31 total)


Time interval Ma Country or state Original ID and collection number
Huayquerian8.0 - 5.0Argentina (Entre Rios) M. sp., M. paranensis, M. obesus, M. sinuata (55600)
Late/Upper Pliocene3.6 - 2.588Argentina (Buenos Aires) M. brevirostris (213136) M. priscus (53926)
Early/Lower Pleistocene2.588 - 0.781Bolivia M. coypus (142016)
Pleistocene (glacial)2.588 - 0.0117Brazil (Minas Gerais) M. coypus (140474)
Ensenadan1.75 - 0.4Bolivia (Tarija) M. perditus (143061)
Ensenadan1.75 - 0.4Argentina (Buenos Aires) M. sp. (199170)
Lujanian0.781 - 0.012Argentina (Buenos Aires) M. priscus (71303) M. sp. (212835)
Lujanian0.781 - 0.012Uruguay M. coypus (71274)
Middle Pleistocene0.774 - 0.129Argentina (Buenos Aires) M. columnaris (63336) M. sp., M. columnaris (63335)
Middle Pleistocene - Late/Upper Pleistocene0.774 - 0.0117Uruguay (Montevideo) M. sp. (120884)
Late/Upper Pleistocene0.129 - 0.0117Brazil (Piauí) M. sp. (211632)
Late/Upper Pleistocene0.129 - 0.0117Brazil (Rio Grande do Sul) M. coypus (124384 124717 147598 148417)
Late/Upper Pleistocene (glacial)0.129 - 0.0117Brazil (Rio Grande do Sul) M. coypus (137181)
Late/Upper Pleistocene0.129 - 0.0117Argentina (Buenos Aires) M. coipus (73845)
Late/Upper Pleistocene0.129 - 0.0117Chile (O'Higgins) M. coypus (71280)
Late/Upper Pleistocene0.129 - 0.0117Uruguay (Montevideo) M. sp. (211645)
Late/Upper Pleistocene (glacial)0.129 - 0.0117Brazil (Bahia) M. coypus (136498)
Late/Upper Pleistocene - Holocene0.129 - 0.0Argentina (Buenos Aires) M. coypus (71348)
Late/Upper Pleistocene - Holocene0.129 - 0.0Brazil (Bahia) M. coypus (212251)
Holocene0.0117 - 0.0Chile M. coypus (215543)
Holocene0.0117 - 0.0Bolivia (Chuquisaca) M. coypus (70705)
Holocene0.0117 - 0.0Argentina (Buenos Aires) M. coypus (71349)
Holocene0.0117 - 0.0Bolivia M. coypus (71324)
Holocene0.0117 - 0.0Brazil (Rio Grande do Sul) M. coypus (211630)
Holocene0.0117 - 0.0Argentina (Entre Ríos) M. coypus (212781)