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Sarmientichnus scagliai

Reptilia

Taxonomy
Sarmientichnus scagliai was named by Casamiquela (1964). It is considered to be a form taxon. Its type specimen is MLP 60-X-31-1 A, a footprint, 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. It is the type species of Sarmientichnus.

Synonyms
Synonymy list
YearName and author
1964Sarmientichnus scagliai Casamiquela pp. 130-131
1971Sarmientichnus scagliai Haubold p. 73
1975Sarmientichnus scagliai Casamiquela p. 98
1979Sarmientichnus scagliai Bonaparte p. 226
1980Sarmientichnus scagliai Bonaparte p. 81
1981Sarmientichnus scagliai Bonaparte p. 681
1981Sarmientichnus scagliai Leonardi p. 932
1987Sarmientichnus scagliai Farlow p. 28
1989Sarmientichnus scagliai Leonardi p. 166
1997Sarmientichnus scagliai Novas p. 681
2003Sarmientichnus scagliai De Valais and Melchor p. 53R
2004Casamiquelichnus navesorum Coria and Paulina Carabajal
2007Sarmientichnus scagliai Calvo p. 322
2011Sarmientichnus scagliai de Valais p. 35
2013Sarmientichnus scagliai Otero and Reguero p. 20
2018Sarmientichnus scagliai Xing et al. p. 9
2025Casamiquelichnus navesorum Foster et al. pp. 299-300

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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
—Sauropsida
RankNameAuthor
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Theropoda()
genusSarmientichnus
speciesscagliai

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.

†Sarmientichnus scagliai Casamiquela 1964
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Invalid names: Casamiquelichnus navesorum Coria and Paulina Carabajal 2004 [synonym]
Diagnosis
ReferenceDiagnosis
R. M. Casamiquela 1964La misma del género.
J. O. Calvo 2007Bipedal and digitigrade dinosaur of small size. Pace angulation closer to 180°. Monodactyl. Digit with acuminate ungual phalanx, but without a true claw impression (Casamiquela 1964\.
S. de Valais 2011Same as for ichnogenus.
J. R. Foster et al. 2025 (Casamiquelichnus navesorum)Tracks made by monodactyl or didactyl, bipedal track makers. Central digit imprint (presumably of Digit III) prominent; other digit imprints reduced to absent. Tracks associated with long, longitudinal grooves (ridges in the natural cast) oriented in the same direction as the tracks and lying close to and parallel to the internal side of each pes print. “Step angle” very wide.