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Micoureus laventicus

Mammalia - Didelphimorphia

Taxonomy
Marmosa laventica was named by Marshall (1976) [Holotype: UCMP 39273, from locality UCMP V4536. Partial right mandibular ramus with lower m1-2, anterior root and posterior alveolus for lower m3, m4 complete.]. It is considered to be a form taxon. Its type specimen is UCMP 39273, a mandible (Partial right mandibular ramus), and it is a 3D body fossil.

It was recombined as Micoureus laventicus by Goin (1997).

Synonymy list
YearName and author
1976Marmosa laventica Marshall
1997Micoureus laventicus Goin

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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()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
subclassMetatheria()
—Marsupialiformes
—Marsupialia()
—AmeridelphiaSzalay 1982
orderDidelphimorphiaGill 1872
—Didelphidae()
subfamilyMarmosinaeReig et al. 1987
tribeMarmosiniReig et al. 1987
genusMicoureusLesson 1842
specieslaventicus()

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.

†Micoureus laventicus Marshall 1976
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Diagnosis
ReferenceDiagnosis
L. G. Marshall 1976Medium sized didelphine. Differs from living species of Marmosa in its larger
size and in having a relatively larger lower m4 talonid with a well developed hypoconulid.
F. J. Goin 1997Slightly larger than the living Micoureus cinereus; differs from the living species of the genus in that the anterobasal cingulum of the lower molars is only partially developed and in that the ectoflexa of the upper molars are comparatively shallow and with larger metacrista
Measurements
partNmeanminimummaximummedians.d.
Ramus height25.745.506.005.750.354

Composition: phosphaticsubp
Environment: terrestrialsubf
Locomotion: actively mobilec
Life habit: scansorialf
Diet: insectivoresubf
Diet 2: carnivoresubf
Reproduction: viviparoussubc
Created: 2013-05-24 23:48:59
Modified: 2013-05-24 08:48:59
Source: subf = subfamily, f = family, subc = subclass, c = class, subp = subphylum
References: Goin 1997, Lillegraven 1979, Nowak 1991, Carroll 1988, Hendy et al. 2009

Age range: base of the Burdigalian to the top of the Laventan or 20.44000 to 11.00000 Ma

Collections (9 total)


Time interval Ma Country or state Original ID and collection number
Burdigalian - Langhian20.44 - 13.82Peru (Cuzco) Marmosa laventica (144513)
Laventan13.8 - 11.0Colombia Micoureus laventicus (13749 117981)
Laventan13.8 - 11.0Colombia (Huila) Marmosa laventica (133648 136233) Micoureus laventicus (187955 188243 188246 188249)