PBDB Taxon

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Haplodontherium

Mammalia - Notoungulata - Haplodontheriidae

Taxonomy

Haplodontherium was named by Ameghino (1885). It is not extant. It is the type genus of Haplodontheriidae.

It was assigned to Toxodontia by Ameghino (1885); to Haplodontheriidae by Ameghino (1907); and to Toxodontidae by Ameghino (1887) and Solórzano and Núñez-Flores (2021).

Species

H. wildei (syn. Toxodontherium reverendum, Toxodon paranensis, Toxodontherium listai, H. limun, Toxodontherium compressum, H. limum), Pachynodon modicus

Synonyms

Pachynodon was named by Burmeister (1891).

It was synonymized subjectively with Haplodontherium by Ameghino (1907); it was considered a nomen dubium by Elissamburu (2007).

It was assigned to Haplodontheriinae by Cione et al. (2000).
Pachynodon modicus was named by Burmeister (1891).

It was considered a nomen dubium by Elissamburu (2007).

Synonymy list

Year	Name and author
1885	Haplodontherium Ameghino p. 75
1887	Haplodontherium Ameghino p. 42
1891	Pachynodon Burmeister
1891	Pachynodon modicus Burmeister
1907	Haplodontherium Ameghino p. 90
2000	Pachynodon Cione et al.
2021	Haplodontherium Solórzano and Núñez-Flores pp. Supplementary data file

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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
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()

Rank	Name	Author
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Theriamorpha	(Rowe 1993)
—	Theriiformes	()
—	Trechnotheria
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Afrotheria	Stanhope et al. 1998
—	Paenungulatomorpha
—	Paenungulata	Simpson 1945
—	Sudamericungulata
order	Notoungulata
suborder	Toxodontia	Ameghino 1887
family	Haplodontheriidae
genus	Haplodontherium

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. †Haplodontherium Ameghino 1885

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†Haplodontherium wildei Ameghino 1885

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Invalid names: Haplodontherium limun Ameghino 1886 [synonym], Toxodon paranensis Ameghino 1883 [synonym], Toxodontherium compressum Ameghino 1883 [synonym], Toxodontherium listai Cozzuol 2006 [synonym], Toxodontherium reverendum Ameghino 1889 [synonym]

Invalid names: Pachynodon Burmeister 1891 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialsubc

Locomotion:

actively mobilec

Life habit:

scansorialsubc

Diet:

herbivoreo

Reproduction:

viviparoussubc

Created:

2009-01-05 17:11:49

Modified:

2009-01-05 19:11:49

Source: o = order, subc = subclass, c = class, subp = subphylum

References: MacFadden et al. 1996, Hendy et al. 2009, Ji et al. 2002, Lillegraven 1979, Carroll 1988

Age range: base of the Huayquerian to the top of the Tortonian or 8.00000 to 7.24600 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Tortonian	11.62 - 7.246	Brazil (Acre)	Toxodontherium listai (55602)
Tortonian	11.62 - 7.246	Argentina (Entre Rios)	Toxodon paranensis (13626)
Huayquerian	8.0 - 5.0	Argentina (Entre Rios)	Toxodontherium compressum, H. wildei, Pachynodon modicus, Toxodontherium reverendum, H. limun (55600)