A new Pre-Deseadan Pyrothere (Mammalia) from northern Peru and the wear facets of molariform teeth of Pyrotheria

Salas, Rodolfo; Sanchez, Jose Escribano; Chacaltana, César A.

doi:10.1671/0272-4634(2006)26[760:anppmf]2.0.co;2

Cited by 15 publications

(34 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the original description, this jaw is interpreted as a right maxillary with P3‐M3 (Hoffstetter 1970; Kramarz and Bond 2005). On the contrary, some recent challengers defended the hypothesis of a left dentary with p3‐m3 (Avilla 2005; Salas et al. 2006), and no agreement exists today on this issue.…”

mentioning

confidence: 99%

“…Actually, only the taxonomic referral of this taxon to Pyrotheria appears to be consensual (e.g. Hoffstetter 1970; Patterson 1977; McKenna 1980; Lucas 1986; Cifelli 1993; McKenna and Bell 1997; Salas et al. 2006), even though Hoffstetter (1970) conceded that this attribution was tentative as many differences exist between Colombitherium and Pyrotheriidae.…”

mentioning

confidence: 99%

“…The Pyrotheriidae are based on Pyrotherium Gaudry, 1909, the only well‐known pyrothere, from the Deseadan South American Land Mammal Age (SALMA; late Oligocene) of Patagonia and Bolivia (Gaudry 1909; Loomis 1914; MacFadden and Frailey 1984; Patterson 1977; Shockey and Anaya 2004). The Pyrotheriidae also include Propyrotherium Ameghino, 1901 from the Mustersan SALMA of Patagonia (Ameghino 1901; Simpson 1967), Griphodon Anthony, 1924 from the ?Eocene of Peru (Anthony 1924; Patterson 1942), Baguatherium Salas et al. , 2006, from the early Oligocene (‘pre‐Deseadan SALMA’), of Peru (Salas et al.…”

mentioning

confidence: 99%

“…The Pyrotheriidae also include Propyrotherium Ameghino, 1901 from the Mustersan SALMA of Patagonia (Ameghino 1901; Simpson 1967), Griphodon Anthony, 1924 from the ?Eocene of Peru (Anthony 1924; Patterson 1942), Baguatherium Salas et al. , 2006, from the early Oligocene (‘pre‐Deseadan SALMA’), of Peru (Salas et al. 2006), and with some doubts Carolozittelia Ameghino, 1901 from the Eocene Casamayoran SALMA of Patagonia (Ameghino 1901; Simpson 1967).…”

mentioning

confidence: 99%

See 3 more Smart Citations

New observations and reinterpretation on the enigmatic taxon Colombitherium (?Pyrotheria, Mammalia) from Colombia

Billet¹,

Orliac²,

Antoine³

et al. 2010

Palaeontology

View full text Add to dashboard Cite

Abstract:The controversial taxon Colombitherium tolimense (Mammalia) (probably Late Eocene in age) from Colombia, although known for nearly 40 years, still bears much mystery. Aside from the problematic ordinal attribution of the holotype and only specimen, its determination as an upper or lower jaw remains a highly debated issue. New observations include the presence of a contact facet on the distal face of the most posterior tooth, which indicates that the fragmentary jaw preserves three premolars and two molars; the M3, unpreserved but present, being most probably reduced. This new interpretation completely fits the morphology of the teeth. Furthermore, the shape of these latter and the deeper wear encompassed by their lingual part relative to the labial one is typical of upper dentition. This is in agreement with the internal curving of the roots of the anterior premolars and with several other arguments that lead interpreting the holotype of C. tolimense as a maxillary bearing P2-M2. This new interpretation deepens the morphological gap between Colombitherium and other pyrotherians (except Proticia) and challenges further its referral to Pyrotheria. The peculiar morphology of Colombitherium relative to other pyrotherians is indeed striking. In fact, Colombitherium has nothing in common with pyrotherians but bilophodont cheek teeth, a feature largely widespread in placental mammals. It is here referred to ?Pyrotheria until additional evidence of its relationships is known. Associated with the putative removal of Proticia from Pyrotheria as argued by some authors, the hypothetical removal of Colombitherium from the order would adjust the widely accepted assumption that the pyrotherian bilophodont cheek teeth originated from bunodont cheek teeth. It would also make an origin from lophodont forms plausible. This in turn would have critical relevance, especially to the hypothesis that pyrotherians are notoungulates.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

New observations and reinterpretation on the enigmatic taxon Colombitherium (?Pyrotheria, Mammalia) from Colombia

Billet¹,

Orliac²,

Antoine³

et al. 2010

Palaeontology

View full text Add to dashboard Cite

show abstract

“…Já as estruturas dentárias foram nomeadas de acordo com as referências relacionadas aos dois diferentes grupos, Leontiniidae (Paula Couto, 1979;van Valen, 1966;Madden, 1990;Villarroel & Danis, 1997) e Pyrotheria (Shockey & Daza, 2004;Salas et al, 2006;Billet, 2010;Billet et al, 2010 Gênero Taubatherium Soria & Alvarenga, 1989 Espécie tipo: Taubatherium paulacoutoi Soria & Alvarenga, 1989 Sinonímia: Taubatherium major Soria & Alvarenga, 1989 Holótipo -fragmento de maxilar direito com P2-4 e alvéolos de P1 e de C (DGM-1087-M).…”

Section: Materiais De Estudounclassified

Osteologia de Taubatherium paulacoutoi Soria & Alvarenga, 1989 (Notoungulata, Leontiniidae) e de um novo Pyrotheria: dois mamíferos fósseis da Formação Tremembé, Brasil (SALMA Deseadense - Oligoceno Superior)

Ribeiro¹

View full text Add to dashboard Cite

The Native Ungulates of South America (Condylarthra and Meridiungulata)

Defler

2018

Topics in Geobiology

View full text Add to dashboard Cite

A new Pre-Deseadan Pyrothere (Mammalia) from northern Peru and the wear facets of molariform teeth of Pyrotheria

Cited by 15 publications

References 10 publications

New observations and reinterpretation on the enigmatic taxon Colombitherium (?Pyrotheria, Mammalia) from Colombia

New observations and reinterpretation on the enigmatic taxon Colombitherium (?Pyrotheria, Mammalia) from Colombia

Osteologia de Taubatherium paulacoutoi Soria & Alvarenga, 1989 (Notoungulata, Leontiniidae) e de um novo Pyrotheria: dois mamíferos fósseis da Formação Tremembé, Brasil (SALMA Deseadense - Oligoceno Superior)

The Native Ungulates of South America (Condylarthra and Meridiungulata)

Contact Info

Product

Resources

About

A new Pre-Deseadan Pyrothere (Mammalia) from northern Peru and the wear facets of molariform teeth of Pyrotheria

Cited by 15 publications

References 10 publications

New observations and reinterpretation on the enigmatic taxon Colombitherium (?Pyrotheria, Mammalia) from Colombia

New observations and reinterpretation on the enigmatic taxon Colombitherium (?Pyrotheria, Mammalia) from Colombia

Osteologia de Taubatherium paulacoutoi Soria &amp; Alvarenga, 1989 (Notoungulata, Leontiniidae) e de um novo Pyrotheria: dois mamíferos fósseis da Formação Tremembé, Brasil (SALMA Deseadense - Oligoceno Superior)

The Native Ungulates of South America (Condylarthra and Meridiungulata)

Contact Info

Product

Resources

About

Osteologia de Taubatherium paulacoutoi Soria & Alvarenga, 1989 (Notoungulata, Leontiniidae) e de um novo Pyrotheria: dois mamíferos fósseis da Formação Tremembé, Brasil (SALMA Deseadense - Oligoceno Superior)