Protypotherium convexidens Ameghino 1891
Description
Protypotherium convexidens Ameghino, 1891
Holotype. MACN-A 4054 (Fig. 2 O), right maxilla with P3–M2 (broken).
Diagnosis (Ameghino 1891: 292). “ De tamaño un poco menor que Protypotherium australe (Moreno) Ameghino , del cual se distingue fácilmente por sus molares superiores de cara externa ligeramente ondulada y convexa en su conjunto. Longitud del espacio ocupado por los p.3 a m.2, 19 milímetros ”.
English translation. Slightly smaller than Protypotherium australe (Moreno) Ameghino, from which it is easily distinguished by the external face of upper molars softly undulated and convex as a whole. Length occupied by P3 to M2, 19 millimetres.
Comments. Ameghino (1891) described this taxon without any illustration. According to Ameghino’s catalogue and to Mones (1986), the maxillary fragment MACN-A 4050 is the type of the species. However, MACN-A 4050 does not match the specimen originally described, because it is a maxillary fragment with P4–M1, with no evidence of recent breaks; in consequence, the specimen MACN-A 4050 cannot be considered as the holotype of the species. Instead, the specimen MACN-A 4054, a maxilla with P3–M1 and broken M2, matches the measurement (length of P3–M2 = 18.9 mm) and the original description provided by Ameghino (1891), because it is smaller than the holotype of P. australe (length of P3–M2 = 32 mm) and presents upper molars slightly labially undulated. Therefore, MACN-A 4054 is herein considered as the holotype of P. convexidens.
Chronological and geographical distribution of the type specimen. Santacrucian SALMA, Santa Cruz Province.
Notes
Files
Files
(2.1 kB)
Name | Size | Download all |
---|---|---|
md5:63fc8c4f4dcd83a363bb36c05a5e70a1
|
2.1 kB | Download |
System files
(12.5 kB)
Name | Size | Download all |
---|---|---|
md5:634edb69f9f6f67917a587cbed04d0f1
|
12.5 kB | Download |
Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- SALMA
- Family
- Interatheriidae
- Genus
- Protypotherium
- Kingdom
- Animalia
- Order
- Notoungulata
- Phylum
- Chordata
- Scientific name authorship
- Ameghino
- Species
- convexidens
- Taxon rank
- species
- Type status
- holotype
- Taxonomic concept label
- Protypotherium convexidens Ameghino, 1891 sec. Fernández, Fernicola, Cerdeño & Reguero, 2018
References
- Ameghino, F. (1891) Nuevos restos de mamiferos fosiles descubiertos por Carlos Ameghino en el Eoceno inferior de la Patagonia austral. Especies nuevas, adiciones y correcciones. Revista Argentina de Historia Natural, 1 (5), 289 - 328.
- Mones A. (1986) Palaeovertebrata Sudamericana. Catalogo Sistematico de los Vertebrados Fosiles de America del Sur, Parte I. Preliminary List and Bibliography. Courier Forschungsinstitut Senckenberg, 82, 1 - 625.