PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
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Arthrodytes

Reptilia - Spheniscidae

Taxonomy

Arthrodytes was named by Ameghino (1905).

It was assigned to Anthropornithinae by Simpson (1946); to Palaeeudyptinae by Brodkorb (1963); to Paraptenodytinae by Acosta Hospitaleche (2005); and to Spheniscidae by Ameghino (1905), Lambrecht (1933), Simpson (1972), Carroll (1988), Acosta Hospitaleche and Tambussi (2008) and Tambussi et al. (2023).

Species

A. andrewsi

Synonymy list

Year	Name and author
1905	Arthrodytes Ameghino p. 143
1933	Arthrodytes Lambrecht p. 233
1946	Arthrodytes Simpson p. 34
1963	Arthrodytes Brodkorb p. 235
1972	Arthrodytes Simpson p. 18
1988	Arthrodytes Carroll
2005	Arthrodytes Acosta Hospitaleche p. 411
2008	Arthrodytes Acosta Hospitaleche and Tambussi p. 120
2023	Arthrodytes Tambussi et al. p. 272

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda

Rank	Name	Author
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Theropoda	()
—	Neotheropoda
—	Averostra	Paul 2002
—	Tetanurae
—	Coelurosauria	()
—	Maniraptora
—	Paraves
class	Aves
subclass	Neornithes	Gadow 1893
—	Aequornithes
—	Feraequornithes
superorder	Procellariimorphae
—	Sphenisciformes	(Sharpe 1891)
family	Spheniscidae	Bonaparte 1831
genus	Arthrodytes

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. †Arthrodytes Ameghino 1905

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†Arthrodytes andrewsi Ameghino 1901

Diagnosis

Reference	Diagnosis
C. Acosta Hospitaleche and C. Tambussi 2008	Considerably larger than any other South American species. Humerus. Straight diaphysis and angulus preaxialis larger than in Paraptenodytes. Elongate condylus ventralis and dorsalis, whereas they are rounded in Paraptenodytes Total length of 142 mm. Femur. Large in size and dyaphysis rounded in section but depressed distally. Deep and well defined fossa poplitea. Absence of linea intermuscularis.