PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Ameghinichnus

Osteichthyes

Taxonomy

Ameghinichnus was named by Casamiquela (1961). It is considered to be a form taxon. Its type is Ameghinichnus patagonicus. It is the type genus of Ameghinichnidae.

It was assigned to Ameghinichnidae by Casamiquela (1961), Casamiquela (1964), Leonardi (1981), Olsen and Galton (1984); to Mammaliaformes by Olsen (1995); to Synapsida by Hunt and Lucas (2007); and to Mammalia by Sarjeant (2000), De Valais and Melchor (2003), De Valais (2009).

Species

A. acutus, A. cancrivorus, A. formosus, A. fortis, A. ginsburgi, A. gracilis, A. intentus, A. major, A. manantialensis, A. mirabilis, A. mirus, A. parvulus, A. parvus, A. patagonicus (type species), A. vandijki, Eopentapodiscus crassus, Eopentapodiscus major

Synonyms

Eopentapodiscus was named by Ellenberger (1970). It is considered to be a form taxon. It is the type genus of Eopentapodiscidae.

It was synonymized subjectively with Ameghinichnus by De Valais (2009).

It was assigned to Eopentapodiscidae by Ellenberger (1974).

Synonymy list

Year	Name and author
1961	Ameghinichnus Casamiquela p. 226
1964	Ameghinichnus Casamiquela pp. 89-90
1970	Eopentapodiscus Ellenberger p. 347
1974	Eopentapodiscus Ellenberger p. 128
1981	Ameghinichnus Leonardi p. 932
1984	Ameghinichnus Olsen and Galton p. 101
1995	Ameghinichnus Olsen p. 173
2000	Ameghinichnus Sarjeant p. 160
2003	Ameghinichnus De Valais and Melchor p. 53R
2007	Ameghinichnus Hunt and Lucas p. 222
2009	Ameghinichnus De Valais p. 7

Is something missing? Join the Paleobiology Database and enter the data

Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
class	Osteichthyes
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda

Rank	Name	Author
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
genus	Ameghinichnus

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.

G. †Ameghinichnus Casamiquela 1961

show all | hide all

†Ameghinichnus acutus Ellenberger 1970

†Ameghinichnus cancrivorus Ellenberger 1970

†Ameghinichnus formosus Ellenberger 1970

†Ameghinichnus fortis Ellenberger 1970

†Ameghinichnus ginsburgi Ellenberger 1970

†Ameghinichnus gracilis Ellenberger 1970

†Ameghinichnus intentus Ellenberger 1970

†Ameghinichnus major Ellenberger 1970

†Ameghinichnus manantialensis De Valais 2009

†Ameghinichnus mirabilis Ellenberger 1970

†Ameghinichnus mirus Ellenberger 1970

†Ameghinichnus parvulus Ellenberger 1970

†Ameghinichnus parvus Ellenberger 1970

†Ameghinichnus patagonicus Casamiquela 1961

†Ameghinichnus vandijki Ellenberger 1970

Invalid names: Eopentapodiscus Ellenberger 1970 [synonym]

Diagnosis

Reference	Diagnosis
S. De Valais 2009	Quadrupedal trackways with nearly homopod, symmetric, pentadactyl manus and pes impressions. The manus-pes sets of each body side display an alternate or opposite configuration in relation to the midline, always with the hand impressions located medially to the footprint and with inward rotation from midline. The footprints display outward rotation from midline, and are slightly larger than the handprints. Both manus and pes are wider than long, with the digit impressions straight. The length and angles between the digit imprints are subequal, and the angle between digits I–V is large. Tail mark often impressed, sinuous and continuous where tracks are in alternating arrangement, or straight and discrete where tracks are in opposite configuration.