PBDB Taxon

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Pleurostylodon modicus

Mammalia - Notoungulata - Isotemnidae

Taxonomy

Pleurostylodon modicus was named by Ameghino (1897). It is a 3D body fossil. Its type locality is Casamayoran of Patagonia, which is in a Casamayoran terrestrial horizon in Argentina. It is the type species of Pleurostylodon.

Synonyms

Trimerostephanos biconus was named by Ameghino (1897). It is a 3D body fossil. Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.

It was recombined as Pleurostylodon biconus by Ameghino (1902); it was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Parastylops coelodus was named by Ameghino (1897). It is a 3D body fossil. Its type locality is Casamayoran of Patagonia, which is in a Casamayoran terrestrial horizon in Argentina. It is the type species of Parastylops.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Anchistrum sulcosum was named by Ameghino (1901). It is a 3D body fossil. Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Tychostylops marculus was named by Ameghino (1901). It is a 3D body fossil. Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Pleurostylodon plexus was named by Ameghino (1901). It is a 3D body fossil. Its type locality is Casamayoran of Patagonia, which is in a Casamayoran terrestrial horizon in Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Pleurostylodon divisus was named by Ameghino (1901). It is a 3D body fossil. Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Dialophus simus was named by Ameghino (1901). It is a 3D body fossil. Its type locality is Pico Salamanca (Barrancan), which is in a Bartonian terrestrial horizon in Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Pleurostylodon sinuosus was named by Ameghino (1902). It is a 3D body fossil. Its type locality is Casamayoran of Patagonia, which is in a Casamayoran terrestrial horizon in Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Dimerostephanos attritus was named by Ameghino (1902). It is a 3D body fossil. Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Pleurostylodon limpidus was named by Ameghino (1904). It is a 3D body fossil. Its type locality is Casamayoran of Patagonia, which is in a Casamayoran terrestrial horizon in Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Pleurostylodon obscurus was named by Ameghino (1904). It is a 3D body fossil. Its type locality is Río Chico, which is in a Casamayoran terrestrial horizon in Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).
Paratemnus geminatus was named by Ameghino (1904). It is a 3D body fossil. Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Pleurostylodon modicus by Simpson (1967).

Synonymy list

Year	Name and author
1897	Trimerostephanos biconus Ameghino p. 484
1897	Pleurostylodon modicus Ameghino p. 485
1897	Parastylops coelodus Ameghino p. 491
1901	Anchistrum sulcosum Ameghino p. 373
1901	Tychostylops marculus Ameghino p. 400
1901	Pleurostylodon divisus Ameghino p. 417
1901	Pleurostylodon plexus Ameghino p. 417
1901	Dialophus simus Ameghino p. 418
1902	Pleurostylodon biconus Ameghino p. 29
1902	Pleurostylodon sinuosus Ameghino p. 29
1902	Dimerostephanos attritus Ameghino p. 31
1904	Pleurostylodon limpidus Ameghino p. 91
1904	Pleurostylodon obscurus Ameghino p. 91
1904	Paratemnus geminatus Ameghino p. 93
1967	Pleurostylodon modicus Simpson

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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	()
—	Mammaliamorpha

Rank	Name	Author
—	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	Isotemnidae
genus	Pleurostylodon
species	modicus

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.

†Pleurostylodon modicus Ameghino 1897

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Invalid names: Anchistrum sulcosum Ameghino 1901 [synonym], Dialophus simus Ameghino 1901 [synonym], Dimerostephanos attritus Ameghino 1902 [synonym], Parastylops coelodus Ameghino 1897 [synonym], Paratemnus geminatus Ameghino 1904 [synonym], Pleurostylodon divisus Ameghino 1901 [synonym], Pleurostylodon limpidus Ameghino 1904 [synonym], Pleurostylodon obscurus Ameghino 1904 [synonym], Pleurostylodon plexus Ameghino 1901 [synonym], Pleurostylodon sinuosus Ameghino 1902 [synonym], Trimerostephanos biconus Ameghino 1897 [synonym], Tychostylops marculus Ameghino 1901 [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: Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009, Carroll 1988, MacFadden et al. 1996

Age range: base of the Casamayoran to the top of the Bartonian or 56.00000 to 38.00000 Ma

Collections (13 total)

Time interval	Ma	Country or state	Original ID and collection number
Casamayoran	56.0 - 48.0	Argentina (Chubut)	Pleurostylodon modicus, Parastylops coelodus, Pleurostylodon plexus, Pleurostylodon sinuosus, Pleurostylodon limpidus (type locality: 176285) Pleurostylodon obscurus (176283)
Bartonian	41.3 - 38.0	Argentina (Chubut)	Pleurostylodon modicus (176163 176178 176180 176181 176182 176184 176185 176187 176191) Pleurostylodon modicus, Dialophus simus (176168) Trimerostephanos biconus, Pleurostylodon modicus, Anchistrum sulcosum, Tychostylops marculus, Pleurostylodon divisus, Dimerostephanos attritus, Paratemnus geminatus (13779)