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Early Oligocene caviomorph rodents from Shapaja, Peruvian Amazonia

Boivin, Myriam and Marivaux, Laurent and Pujos, François and Salas-Gismondi, Rodolfo and Tejada-Lara, Julia V. and Varas-Malca, Rafael M. and Antoine, Pierre-Olivier (2018) Early Oligocene caviomorph rodents from Shapaja, Peruvian Amazonia. Palaeontographica Abteilung A, 311 (1-6). pp. 87-156. ISSN 0375-0442. doi:10.1127/pala/2018/0075.

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The rodent record during the late Eocene – early Oligocene interval is poorly known in South America. Our team’s recent fieldwork in Peruvian Amazonia allowed for the discovery of five new fossil-bearing localities in a single stratigraphic section at Shapaja (Tarapoto area, San Martín Department), considered as early Oligocene by mammalian biostratigraphy. Here, we describe the caviomorph material from Shapaja, which documents 17 distinct taxa (with the co-occurrence of four to seven caviomorph taxa in a single level) representing at least three of the four extant superfamilies. Eight taxa are new to science: Kichkasteiromys raimondii nov. gen. et sp. and Shapajamys labocensis nov. gen. et sp. (Erethizontoidea), Selvamys paulus nov. gen. et sp. and Mayomys confluens nov. gen. et sp. (Octodontoidea), Eoincamys valverdei nov. sp. and E. parvus nov. sp. (?Chinchilloidea), and Tarapotomys subandinus nov. gen. et sp. and T. mayoensis nov. gen. et sp. (superfamily indet.). These diversified caviomorph faunas constitute the most equatorial Paleogene record of this group. The taxa from Shapaja are not documented in other low-, mid- and high-latitudes Paleogene localities, except for Eoincamys. This genus is otherwise only found at Santa Rosa (Peruvian Amazonia, ?late Eocene/early Oligocene), thereby indicating a close temporal window for the Shapaja localities.

Item Type:Article
Related URLs:
URLURL TypeDescription
Boivin, Myriam0000-0002-5240-9460
Marivaux, Laurent0000-0002-2882-0874
Pujos, François0000-0002-6267-3927
Salas-Gismondi, Rodolfo0000-0001-9990-8841
Tejada-Lara, Julia V.0000-0003-2307-6764
Varas-Malca, Rafael M.0000-0002-4435-8229
Antoine, Pierre-Olivier0000-0001-9122-1818
Additional Information:© 2018 Schweizerbart Science Publishers.
Subject Keywords:systematics • biostratigraphy • Tinguirirican • Peru • South America
Issue or Number:1-6
Record Number:CaltechAUTHORS:20220810-751617000
Persistent URL:
Official Citation:Myriam Boivin, Laurent Marivaux, Francois Pujos, Rodolfo Salas-Gismondi, Julia Tejada-Lara, et al.. Early Oligocene caviomorph rodents from Shapaja, Peruvian Amazonia. Palaeontographica A, E Schweizerbart Science Publishers, 2018, 311 (1-6), pp.87-156. ⟨10.1127/pala/2018/0075⟩. ⟨hal-02052225⟩
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116204
Deposited By: George Porter
Deposited On:15 Aug 2022 20:56
Last Modified:15 Aug 2022 20:56

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