PBDB Taxon

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

Hydromedusa tectifera (Argentine snake-necked turtle)

Osteichthyes - Testudines - Chelidae

Taxonomy

Hydromedusa tectifera was named by Cope (1869). It is extant.

Synonyms

Platemys antiqua was named by Ameghino (1882). Its type specimen is MLP uncat., a partial shell, and it is a 3D body fossil. Its type locality is Ameghino's Platemys type locality, which is in a Pleistocene lacustrine horizon in the Pampean Formation of Argentina.

It was synonymized subjectively with Hydromedusa tectifera by de Broin and de la Fuente (1993), Maniel and de la Fuente (2016).
Platemys fossilis was named by Ameghino (1882). Its type specimen is MLP uncat., a partial shell, and it is a 3D body fossil. Its type locality is Ameghino's Platemys type locality, which is in a Pleistocene lacustrine horizon in the Pampean Formation of Argentina.

It was synonymized subjectively with Hydromedusa tectifera by de Broin and de la Fuente (1993), Maniel and de la Fuente (2016).
Platemys laevis was named by Ameghino (1882). Its type specimen is MLP uncat., a partial shell, and it is a 3D body fossil. Its type locality is Ameghino's Platemys type locality, which is in a Pleistocene lacustrine horizon in the Pampean Formation of Argentina.

It was synonymized subjectively with Hydromedusa tectifera by de Broin and de la Fuente (1993), Maniel and de la Fuente (2016).
Platemys robusta was named by Ameghino (1882). Its type specimen is MLP uncat., a partial shell, and it is a 3D body fossil.

It was synonymized subjectively with Hydromedusa tectifera by de Broin and de la Fuente (1993), Maniel and de la Fuente (2016).

Synonymy list

Year	Name and author
1869	Hydromedusa tectifera Cope
1882	Platemys antiqua Ameghino
1882	Platemys fossilis Ameghino
1882	Platemys laevis Ameghino
1882	Platemys robusta Ameghino
2014	Hydromedusa tectifera de la Fuente et al.
2014	Hydromedusa tectifera van Dijk et al.

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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
—	Reptiliomorpha

Rank	Name	Author
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
—	Testudinata	(Oppel 1811)
order	Testudines	Batsch 1788
suborder	Pleurodira
family	Chelidae	Gray 1825
genus	Hydromedusa	Wagler 1830
species	tectifera

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.

Hydromedusa tectifera Cope 1869 [Argentine snake-necked turtle]

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Invalid names: Platemys antiqua Ameghino 1882 [synonym], Platemys fossilis Ameghino 1882 [synonym], Platemys laevis Ameghino 1882 [synonym], Platemys robusta Ameghino 1882 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Body part:

carapacef

Adult length:

0.1 to < 1.0f

Grouping:

solitaryf

Environment:

freshwaterf

Locomotion:

actively mobilec

Life habit:

amphibiousf

Diet:

piscivoref

Reproduction:

oviparousf

Created:

2005-08-25 14:20:51

Modified:

2005-08-26 16:30:55

Source: f = family, c = class, subp = subphylum

References: Ernst and Barbour 1989, Hendy et al. 2009, Carroll 1988

Age range: base of the Montehermosan to the top of the Late/Upper Pleistocene or 5.00000 to 0.01170 Ma

Collections (5 total)

Time interval	Ma	Country or state	Original ID and collection number
Montehermosan	5.0 - 3.8	Argentina (Buenos Aires)	Hydromedusa tectifera (140635)
Pleistocene	2.58 - 0.0117	Argentina (Buenos Aires)	Platemys antiqua, Platemys fossilis, Platemys laevis, Platemys robusta (191141)
Middle Pleistocene	0.774 - 0.129	Argentina (Buenos Aires)	Hydromedusa tectifera (63335)
Late/Upper Pleistocene	0.129 - 0.0117	Argentina (Buenos Aires)	Hydromedusa tectifera (71316)
Late/Upper Pleistocene (glacial)	0.129 - 0.0117	Brazil (Rio Grande do Sul)	Hydromedusa tectifera (137181)