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Acyon tricuspidatus

Osteichthyes - Sparassodonta

Taxonomy
Acyon tricuspidatus was named by Ameghino (1887). Its type specimen is MLP 11-64, a mandible (right mandibular ramus in two parts, anterior with root of c, alveoli of p1-2; posterior with p3-m4 all present but partially broken), and it is a 3D body fossil. Its type locality is Monte León, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina. It is the type species of Acyon.

It was synonymized subjectively with Cladosictis defossa by Marshall (1978); it was synonymized subjectively with Anatherium defossus by Marshall (1981).

Synonyms
  • Anatherium herrerae was named by Marshall (1981). Its type specimen is FMNH P13521, a mandible (associated left and right mandibular rami with bases of cs, and p1-m4 (tips of right p1-2 and protoconids of right m3 and left m3-4 missing)), and it is a 3D body fossil. Its type locality is Gran Barranca - southern cliff of lake Colhué Huapí, which is in a Colhuehuapian terrestrial horizon in the Sarmiento Formation of Argentina.

    It was synonymized subjectively with Acyon tricuspidatus by Forasiepi et al. (2006).
  • Ictioborus destructor was named by Ameghino (1894) [title: Enumeracion synoptique des especes de mammiferes fossiles des formaciones eocenes de Patagonie]. Its type specimen is MACN 5988, a mandible (fragment of right mandibular ramus with posterior root of p1, roots of p2-3, m1-2 complete but very, very worn), and it is a 3D body fossil. Its type locality is Shehuén, which is in a Santacrucian terrestrial horizon in the Santa Cruz Formation of Argentina.

    It was synonymized subjectively with Cladosictis defossa by Marshall (1978); it was synonymized subjectively with Anatherium defossus by Marshall (1981); it was synonymized subjectively with Acyon tricuspidatus by Forasiepi et al. (2006).
Synonymy list
YearName and author
1887Acyon tricuspidatus Ameghino p. 8
1894Acyon tricuspidatus Ameghino p. 141
1894Ictioborus destructor Ameghino p. 396
1981Anatherium herrerae Marshall p. 103 figs. 72, 73
2006Acyon tricuspidatus Forasiepi et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
RankNameAuthor
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
subclassMetatheria()
—Marsupialiformes
orderSparassodonta()
subfamilyHathlyacininae()
genusAcyonAmeghino 1887
speciestricuspidatusAmeghino 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.

†Acyon tricuspidatus Ameghino 1887
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Invalid names: Anatherium herrerae Marshall 1981 [synonym], Ictioborus destructor Ameghino 1894 [synonym]
Diagnosis
No diagnoses are available
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: Hendy et al. 2009, Goin 1997, Carroll 1988, Lillegraven 1979, Clemens 1979

Age range: base of the Colhuehuapian to the top of the Santacrucian or 21.00000 to 16.30000 Ma

Collections (5 total)


Time interval Ma Country or state Original ID and collection number
Colhuehuapian21.0 - 17.5Argentina (Chubut) Anatherium herrerae (141368)
Santacrucian17.5 - 16.3Argentina (Santa Cruz) Acyon tricuspidatus (27313 type locality: 176563 176593) Ictioborus destructor (176594)