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Anachlysictis gracilis

Mammalia - Sparassodonta - Thylacosmilidae

Discussion

IGM 184247, right horizontal ramus with almost complete m2, and broken m3-4; left mandibular frgment with m2-3 complete; fragment of left symphysis; very fragmentary left frontolacrimal portion of the skull, and associated, very fragmentated postcranial material.

Taxonomy
Anachlysictis gracilis was named by Goin (1997) [Etymology: from the latin gracilis, slender]. Its type specimen is IGM 184247, a mandible (Lower p2), and it is a 3D body fossil. Its type locality is Duke Locality 75 (La Venta Fauna), which is in a Laventan/Mayoan fluvial claystone/sandstone in the Villavieja Formation of Colombia. It is the type species of Anachlysictis.

Synonymy list
YearName and author
1997Anachlysictis gracilis Goin
2023Anachlysictis gracilis Suarez 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
RankNameAuthor
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
subclassMetatheria()
Marsupialiformes
orderSparassodonta()
familyThylacosmilidaeRiggs 1933
genusAnachlysictis
speciesgracilis

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.

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Diagnosis
ReferenceDiagnosis
F. J. Goin 1997Differs from Achlysictis lelongi in its smaller size, mandible much more slender and with the symphyseal flange much less developed; lower premolar double-rooted and apparently not conical; lower molars, except m4, with small but distinct talonids; distance from m4 to mandibular condule comparatively much longer; masseteric fosa much better developed; facial portion of skull apparently flat with the ascending process of the maxillary very reduced of lacking; postorbital bar absent.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubo
Locomotion: actively mobilec
Life habit: scansorialsubc
Diet: carnivoresubo
Reproduction: viviparoussubc
Created: 2013-05-24 23:51:13
Modified: 2013-05-24 08:51:13
Source: subo = suborder, subc = subclass, c = class, subp = subphylum
References: Clemens 1979, Goin 1997, Lillegraven 1979, Carroll 1988, Hendy et al. 2009

Age range: Laventan or 13.80000 to 11.00000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Laventan13.8 - 11.0Colombia (Huila) Anachlysictis gracilis (143792 187121)
Laventan - Mayoan13.8 - 10.0Colombia Anachlysictis gracilis (type locality: 13741)