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Niolamia argentina
Taxonomy
Niolamia argentina was named by Ameghino (1899). Its type specimen is MLP 26-40, a skull (almost complete skull and lower jaw), and it is a 3D body fossil. Its type locality is Cañadón Blanco (Niolamia locality), which is in an Eocene terrestrial tuff in Argentina.
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1899 | Niolamia argentina Ameghino |
| 1901 | Miolania argentina Woodward p. 176 |
| 1901 | Niolamia argentina Woodward p. 176 |
| 1934 | Miolania argentina Swinton figs. Pl. IX |
| 1937 | Niolamia argentina Simpson |
| 1938 | Niolamia argentina Simpson |
| 2011 | Niolamia argentina Sterli and de la Fuente |
| 2013 | Niolamia argentina Pérez-García and Murelaga |
| 2014 | Niolamia argentina de la Fuente et al. |
| 2015 | Niolamia argentina Sterli |
| 2020 | Niolamia argentina Lloyd and Slater |
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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.
†Niolamia argentina Ameghino 1899
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Invalid names: Miolania argentina Woodward 1901 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Sterli 2015 | Niolamia argentina is differentiated from other meiolaniids by the significantly large cranial scute A, contact of scute A with scute X, separation of the raised D scutes by a large, rectangular scute X, scute X does not separate G scutes in adults, the absence of scute H, contact between scutes D and F, straight, posterolaterally projecting scute B, presence of a broad shelf at the back of the skull formed by scutes A–C, protruding nasal bones, absence of pterygoid covering the foramen caroticum basisphenoidale, participation of the quadrate in the foramen stapedio-temporale, presence of a triturating surface with only two ridges (labial and lingual ridges), an undivided apertura narium externa, absence of a nasomaxillary sinus, presence of spines on the posterolateral border of the carapace, the presence of supracaudal scute and a broad pygal embayment and the presence of ventrally closed tail rings. |
Measurements
No measurements are available
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| Source: f = family, c = class, subp = subphylum | |||||
| References: Carroll 1988, Kiessling 2004, Hendy et al. 2009, Sterli 2015 | |||||
Age range: base of the Middle Eocene to the top of the Casamayoran or 48.07000 to 48.00000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Casamayoran | Argentina (Chubut) | Crossochelys corniger (39295) | |
| Middle Eocene | Argentina (Chubut) | Niolamia argentina (type locality: 185027) |