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Microbiotherium tehuelchum

Mammalia - Microbiotheria - Microbiotheriidae

Taxonomy
Microbiotherium tehuelchum was named by Ameghino (1887). Its type specimen is MLP 11-36, a mandible (nearly complete right mandibular ramus with p2-m4 complete), and it is a 3D body fossil. Its type locality is Santa Cruz Formation, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

Synonyms
  • Phonocdromus patagonicus was named by Ameghino (1894). Its type specimen is MACN 5741, a mandible (left mandibular ramus with partial dentition), and it is a 3D body fossil. Its type locality is Cerro Observatorio, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

    It was synonymized subjectively with Microbiotherium tehuelchum by Marshall (1982).
  • Halmarhiphus didelpoides was named by Ameghino (1891). Its type specimen is MACN 5716, a mandible (fragment of a right mandibular ramus with m1-2 complete, and roots of m3-4), and it is a 3D body fossil. Its type locality is Cerro Observatorio, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

    It was corrected as Halmarhiphus didelphoides by Ameghino (1894); it was synonymized subjectively with Microbiotherium tehuelchum by Marshall (1982).
  • Microbiotherium forticulum was named by Ameghino (1891). Its type specimen is MACN 5725, a mandible (fragment of left mandibular ramus with alveoli of c and m2, and p1-m1 complete), and it is a 3D body fossil. Its type locality is Cerro Observatorio, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

    It was synonymized subjectively with Microbiotherium tehuelchum by Marshall (1982).
  • Eodidelphys fortis was named by Ameghino (1891). Its type specimen is MACN 5729, a mandible (left mandibular ramus with alveoli of i1-c1 and p1-m4 complete), and it is a 3D body fossil. Its type locality is Cerro Observatorio, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

    It was synonymized subjectively with Microbiotherium tehuelchum by Marshall (1982).
  • Eodidelphys famula was named by Ameghino (1891). Its type specimen is MACN 5732, a mandible (right mandibular ramus with p1-m4 and alveoli of all other teeth), and it is a 3D body fossil. Its type locality is Cerro Observatorio, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

    It was synonymized subjectively with Microbiotherium tehuelchum by Marshall (1982).
  • Hadrorhynchus tortor was named by Ameghino (1891). Its type specimen is MACN 5738, a mandible (fragment of right mandibular ramus with alveoli of i1-c, roots of p1-2, p3 complete, and alveoli of m1-2), and it is a 3D body fossil. Its type locality is Cerro Observatorio, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

    It was synonymized subjectively with Microbiotherium tehuelchum by Marshall (1982).
  • Hadrorhynchus torvus was named by Ameghino (1891). Its type specimen is MACN 5739, a mandible (fragment of right mandibular ramus with alveoli of c, roots of p1, p2-3 complete, and alveoli of m1), and it is a 3D body fossil. Its type locality is Cerro Observatorio, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

    It was synonymized subjectively with Microbiotherium tehuelchum by Marshall (1982).
Synonymy list
YearName and author
1887Microbiotherium tehuelchum Ameghino
1891Halmarhiphus didelpoides Ameghino
1891Microbiotherium forticulum Ameghino p. 23
1891Microbiotherium tehuelchum Ameghino p. 23
1891Eodidelphys famula Ameghino p. 24
1891Eodidelphys fortis Ameghino p. 24
1891Hadrorhynchus tortor Ameghino p. 25
1891Hadrorhynchus torvus Ameghino p. 25
1894Phonocdromus patagonicus Ameghino p. 100
1894Halmarhiphus didelphoides Ameghino p. 101
1894Eodidelphys famula Ameghino p. 105
1894Eodidelphys fortis Ameghino p. 105
1894Microbiotherium forticulum Ameghino p. 105
1894Microbiotherium tehuelchum Ameghino p. 105
1894Hadrorhynchus tortor Ameghino p. 106
1894Hadrorhynchus torvus Ameghino p. 106
1982Microbiotherium tehuelchum Marshall
2012Microbiotherium tehuelchum Abello 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
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
subclassMetatheria()
—Marsupialiformes
—Marsupialia()
—AustralidelphiaSzalay 1982
orderMicrobiotheriaAmeghino 1899
familyMicrobiotheriidae(Ameghino 1887)
genusMicrobiotheriumAmeghino 1887
speciestehuelchumAmeghino 1887

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.

†Microbiotherium tehuelchum Ameghino 1887
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Invalid names: Eodidelphys famula Ameghino 1891 [synonym], Eodidelphys fortis Ameghino 1891 [synonym], Hadrorhynchus tortor Ameghino 1891 [synonym], Hadrorhynchus torvus Ameghino 1891 [synonym], Halmarhiphus didelpoides Ameghino 1891 [synonym], Microbiotherium forticulum Ameghino 1891 [synonym], Phonocdromus patagonicus Ameghino 1894 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialc
Locomotion: actively mobilec
Life habit: scansorialf
Diet: insectivoref
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-06-08 12:11:09
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Clemens 1979, Nowak 1991, Hopson 1973, Lillegraven 1979, Carroll 1988, Hendy et al. 2009

Age range: base of the Santacrucian to the top of the Burdigalian or 17.50000 to 15.97000 Ma

Collections (13 total)


Time interval Ma Country or state Original ID and collection number
Burdigalian20.44 - 15.97Argentina (Santa Cruz) Microbiotherium tehuelchum (59320 59321)
Santacrucian17.5 - 16.3Argentina (Santa Cruz) Microbiotherium tehuelchum (type locality: 27313 87314 142533 176565 176566 176571 176590 176593 210638) Phonocdromus patagonicus, Halmarhiphus didelpoides, Microbiotherium tehuelchum, Microbiotherium forticulum, Eodidelphys fortis, Eodidelphys famula, Hadrorhynchus tortor, Hadrorhynchus torvus (176570)
Friasian16.3 - 15.5Chile (Aisén) Microbiotherium tehuelchum (139845)