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Ameghinichnus manantialensis

Mammalia

Taxonomy
Ameghinichnus manantialensis was named by De Valais (2009). It is considered to be a form taxon. Its type specimen is MPEF-IC 1028, a footprint (trackways with three manus-pes sets with alternate arrangement about the midline), and it is a trace fossil. Its type locality is Estancia Laguna Manantiales tracksite (9.2 m), which is in a Callovian/Oxfordian eolian sandstone in the La Matilde Formation of Argentina.

Synonymy list
YearName and author
2009Ameghinichnus manantialensis De Valais p. 13
2025Ameghinichnus manantialensis Foster et al. p. 275

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
RankNameAuthor
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
genusAmeghinichnus
speciesmanantialensis

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.

†Ameghinichnus manantialensis De Valais 2009
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Diagnosis
ReferenceDiagnosis
S. De Valais 2009Ameghinichnus preserved as manus and pes tracks with a length:width ratio of 0.7 and 0.6 respectively. Manus digit impressions are subequal in length, with relative digit length: I < V < IV < II ~ III, angles between between II–III < III–IV < I–II ~ IV–V. Manus impressions display an inward rotation of about -38° in relation to the midline, and are located aligned to anteriorly to pes. Pes digit impressions are subequal in length,with relative length: I < III < IV ~ V < II, angles between III–IV < II–III < I–II < IV–V. Pes impressions display an outward rotation of about 26° in relation to the midline. Both I–V angles for pes and manus are about 107°. Claw marks are absent and there are no evident phalangeal pads. When manus-pes sets display an alternating arrangement about the midline, manus and pes pace angulation averages 156° and 110° respectively, and manus and pes stride length is about 116 mm and 119 mm respectively.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialc
Locomotion: actively mobilec
Life habit: scansorialuc
Diet: insectivoreuc
Created: 2005-09-06 19:53:51
Modified: 2005-09-07 19:44:02
Source: c = class, subp = subphylum, uc = unranked clade
References: Hopson 1973, Luo et al. 2003, Hendy et al. 2009, Carroll 1988

Age range: base of the Callovian to the top of the Oxfordian or 166.10000 to 157.30000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Callovian - Oxfordian166.1 - 157.3Argentina (Santa Cruz) Ameghinichnus manantialensis (type locality: 85570)