Evolutionary pattern of Metacaremys gen. nov. (Rodentia, Octodontidae) and its biochronological implications for the late Miocene and early Pliocene of southern South America

Paralonchothrix gen. nov., the first record of Echimyini (Rodentia, Octodontoidea) in the late Miocene of Southern South America

Earth and Environmental Science Transactions of the Royal Society of Edinburgh ◽

10.1017/s175569102100027x ◽

2021 ◽

pp. 1-12

Author(s):

Pedro PIÑERO ◽

A. Itatí OLIVARES ◽

Diego H. VERZI ◽

Victor H. CONTRERAS

Keyword(s):

South America ◽

Late Miocene ◽

New Genus ◽

Sister Group ◽

First Record ◽

Northwestern Argentina ◽

Southern South America ◽

Evolutionary Pattern ◽

Minimum Age ◽

First Time

ABSTRACT Echimyidae is the most widely diversified family among hystricognath rodents, both in the number of species and variety of lifestyles. In the Patagonian Subregion of southern South America, extinct echimyids related to living arboreal species (Echimyini) are recorded up to the middle Miocene, whereas all the known southern fossils since the late Miocene are linked to terrestrial and fossorial lineages currently inhabiting the Chacoan open biome in eastern South America. In this work, we describe a new genus of echimyid rodent, Paralonchothrix gen. nov., from the late Miocene of northwestern Argentina and western Brazil. Its single recognised species, Paralonchothrix ponderosus comb. nov., is represented by two hemimandibles. One of them comes from a level of Loma de Las Tapias Formation, underlying a tuff dated at 7.0 ± 0.9 Ma (Huayquerian age, late Miocene); the other specimen comes from the ‘Araucanense’ of Valle de Santa María (type locality, Huayquerian age, late Miocene). A phylogenetic analysis linked Paralonchothrix to Lonchothrix, both being the sister group to Mesomys. Thereby, for the first time, an echimyid linked to living Amazonian arboreal clades is recognised for the late Miocene of southern South America. Paralonchothrix gen. nov. thus represents an exceptional record that raises the need to review the postulated evolutionary pattern for echimyids recorded at high latitudes since the late Miocene. The new genus provides a minimum age (ca.7 Ma) in the fossil record for the divergence between Mesomys and Lonchothrix. The palaeoenvironmental conditions inferred for the late Miocene in western and northwestern Argentina suggest savanna-type environments, with areas with more closed woodlands in peri-Andean valleys. The record of Paralonchothrix gen. nov. supports the hypothesis that this area would have maintained connections with tropical biomes of northern South America during the late Miocene.

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Herminespina: New genus of Neogene muricid gastropod from Peru and Chile

Journal of Paleontology ◽

10.1017/s0022336000040099 ◽

1997 ◽

Vol 71 (4) ◽

pp. 610-615 ◽

Cited By ~ 13

Author(s):

T. J. DeVries ◽

G. J. Vermeij

Keyword(s):

South America ◽

Late Miocene ◽

New Genus ◽

Geographic Range ◽

Early Miocene ◽

South American ◽

South American Species ◽

Late Pliocene ◽

Early Pliocene ◽

Southern Peru

The new genus Herminespina comprises extinct South American species of “Thais”-like ocenebrine gastropods with prominent colabral folds and a labral spine. Geographic range extensions into Peru are reported for the late Pliocene H. mirabilis and the late Miocene to Pliocene H. philippii, both previously known only from Chile. A new early Pliocene species, H. saskiae, is described from the Sacaco Basin of southern Peru and compared with an early Miocene muricid from Peru and Chile, Acanthina katzi. Herminespina is one of several genera of Neogene muricids in western South America that bear labral spines.

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A new Echimyidae (Rodentia, Hystricomorpha) from the late Miocene of southern South America

Journal of Vertebrate Paleontology ◽

10.1080/02724634.2017.1239204 ◽

2016 ◽

Vol 37 (1) ◽

pp. e1239204 ◽

Cited By ~ 4

Author(s):

A. Itatí Olivares ◽

Diego H. Verzi ◽

Victor H. Contreras ◽

Leila Pessôa

Keyword(s):

South America ◽

Late Miocene ◽

Southern South America

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A New Glyptodont (Xenarthra: Cingulata) from the Late Miocene of Argentina: New Clues About the Oldest Extra-Patagonian Radiation in Southern South America

Journal of Mammalian Evolution ◽

10.1007/s10914-021-09599-w ◽

2022 ◽

Author(s):

Daniel Barasoain ◽

Alfredo E. Zurita ◽

Darin A. Croft ◽

Claudia I. Montalvo ◽

Víctor H. Contreras ◽

...

Keyword(s):

South America ◽

Late Miocene ◽

Southern South America

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A New Condor (Ciconiiformes, Vulturidae) from the Late Miocene/Early Pliocene Pisco Formation, Peru

The Condor ◽

10.1093/condor/107.1.107 ◽

2005 ◽

Vol 107 (1) ◽

pp. 107-113 ◽

Cited By ~ 2

Author(s):

Marcelo Stucchi ◽

Steven D. Emslie

Keyword(s):

South America ◽

Late Miocene ◽

New Genus ◽

New Genus And Species ◽

Early Pliocene ◽

Terrestrial Vertebrate ◽

The Andes ◽

Pisco Formation ◽

Western Side ◽

América Del Sur

AbstractWe report the oldest fossil condor (Vulturidae) from South America and the first from the Pisco Formation (14.0–2.0 Ma) of Peru, described herein as Perugyps diazi new genus and species. The Pisco Formation, exposed on the southern coast of Peru, has produced well-preserved and abundant marine and terrestrial vertebrate fossils from the late Miocene/early Pliocene (6.0–4.5 Ma) Montemar and Sacaco Sur localities, from where P. diazi was recovered. The new condor adds to our knowledge on the evolution and biogeographic distribution of New World vultures. The age of this new species supports the hypothesis that condors probably evolved in North America and entered South America by the late Miocene/early Pliocene. We believe it is likely that the first condors to reach South America probably did so via a coastal corridor along the western side of the Andes where they became part of the diverse coastal fauna in southern Peru.Un Nuevo Cóndor (Ciconiiformes, Vulturidae) del Mioceno Tardío-Plioceno Temprano de la Formación Pisco, PerúResumen. Se reporta el cóndor más antiguo de América del Sur y el primero para la Formación Pisco (14–2 Ma), y se describe como Perugyps diazi. De esta formación, situada en la costa sur del Perú, provienen gran cantidad de aves marinas en muy buen estado de conservación, en especial de los niveles Montemar y Sacaco Sur (Mioceno tardío/Plioceno temprano, 6.0–4.5 Ma), justamente de donde procede Perugyps. Este nuevo cóndor añade importante información sobre la evolución y distribución biogeográfica de estas aves, pues su edad apoya la hipótesis de que los cóndores probablemente evolucionaron en América del Norte y entraron a América del Sur entre el Mioceno tardío y el Plioceno temprano. Sugerimos que su llegada pudo realizarse por el corredor costero del lado occidental de los Andes, en donde pasaron a formar parte de la diversa fauna del sur del Perú.

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