TY - JOUR
T1 - Parvimico materdei gen. et sp. nov.
T2 - A new platyrrhine from the Early Miocene of the Amazon Basin, Peru
AU - Kay, Richard F.
AU - Gonzales, Lauren A.
AU - Salenbien, Wout
AU - Martinez, Jean Noël
AU - Cooke, Siobhán B.
AU - Valdivia, Luis Angel
AU - Rigsby, Catherine
AU - Baker, Paul A.
N1 - Funding Information:
This work was supported by National Science Foundation (grants EAR 1338694 to P. A. B and R. F. K. and DDIG 0726134 to S. B. C.) and the National Geographic Society (Young Explorers Grant 9920-16 to W.S. and Waitt Grant W449-16 to R.F.K.). We graciously thank the Instituto de Paleontología, Universidad Nacional de Piura, for hosting the expedition and housing all recovered AMD fossils and continuing to pick screenwash matrix. The field crew of expeditions over 2016 and 2017 included Dorien de Vries (who found the primate), Miguel Ortega, Gustavo Béjar, Anthony Deza, David Chávez, Alex Wheatley, Richard F. Kay, Lauren A. Gonzales, Wout Salenbien, Luis Angel Valdivia Coveñas, Catherine Rigsby, and Paul A. Baker. We especially thank the Machiguenga and Cusquenian boatmen for their help navigating the Río Alto Madre de Dios and its tributaries and their guidance in the field. We are also indebted to Marianne van Vlaardingen for assistance with travel and logistics. Laurent Marivaux, John Kappelman, Jonathan Bloch and David Alba provided essential editing and valuable scientific criticism.
Funding Information:
This work was supported by National Science Foundation (grants EAR 1338694 to P. A. B and R. F. K. and DDIG 0726134 to S. B. C.) and the National Geographic Society (Young Explorers Grant 9920-16 to W.S. and Waitt Grant W449-16 to R.F.K.). We graciously thank the Instituto de Paleontolog?a, Universidad Nacional de Piura, for hosting the expedition and housing all recovered AMD fossils and continuing to pick screenwash matrix. The field crew of expeditions over 2016 and 2017 included Dorien de Vries (who found the primate), Miguel Ortega, Gustavo B?jar, Anthony Deza, David Ch?vez, Alex Wheatley, Richard F. Kay, Lauren A. Gonzales, Wout Salenbien, Luis Angel Valdivia Cove?as, Catherine Rigsby, and Paul A. Baker. We especially thank the Machiguenga and Cusquenian boatmen for their help navigating the R?o Alto Madre de Dios and its tributaries and their guidance in the field. We are also indebted to Marianne van Vlaardingen for assistance with travel and logistics. Laurent Marivaux, John Kappelman, Jonathan Bloch and David Alba provided essential editing and valuable scientific criticism.
Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/9
Y1 - 2019/9
N2 - Three field seasons of exploration along the Río Alto Madre de Dios in Peruvian Amazonia have yielded a fauna of micromammals from a new locality AMD-45, at ∼12.8°S. So far we have identified the new primate described here as well as small caviomorph rodents, cenolestoid marsupials, interatheriid notoungulates, xenarthrans, fish, lizards and invertebrates. The site is in the Bala Formation as exposed where the river transects a syncline. U-Pb dates on detrital zircons constrain the locality's age at between 17.1 ± 0.7 Ma and 18.9 ± 0.7 Ma, making the fauna age-equivalent to that from the Pinturas Formation and the older parts of the Santa Cruz Formation of Patagonian Argentina (Santacrucian). The primate specimen is an unworn M1 of exceptionally small size (equivalent in size to the extant callitrichine, Callithrix jacchus, among the smallest living platyrrhines and the smallest Eocene-Early Miocene platyrrhine yet recorded). Despite its small size it is unlike extant callitrichines in having a prominent cingulum hypocone. Based on the moderate development of the buccal crests, this animal likely had a diet similar to that of frugivorous callitrichines, and distinctly different from the more similarly-sized gummivores, Cebuella and C. jacchus. The phyletic position of the new taxon is uncertain, especially given the autapomorphic character of the tooth as a whole. Nevertheless, its unusual morphology hints at a wholly original and hitherto unknown Amazonian fauna, and reinforces the impression of the geographic separation of the Amazonian tropics from the more geographically isolated southerly parts of the continent in Early Miocene times.
AB - Three field seasons of exploration along the Río Alto Madre de Dios in Peruvian Amazonia have yielded a fauna of micromammals from a new locality AMD-45, at ∼12.8°S. So far we have identified the new primate described here as well as small caviomorph rodents, cenolestoid marsupials, interatheriid notoungulates, xenarthrans, fish, lizards and invertebrates. The site is in the Bala Formation as exposed where the river transects a syncline. U-Pb dates on detrital zircons constrain the locality's age at between 17.1 ± 0.7 Ma and 18.9 ± 0.7 Ma, making the fauna age-equivalent to that from the Pinturas Formation and the older parts of the Santa Cruz Formation of Patagonian Argentina (Santacrucian). The primate specimen is an unworn M1 of exceptionally small size (equivalent in size to the extant callitrichine, Callithrix jacchus, among the smallest living platyrrhines and the smallest Eocene-Early Miocene platyrrhine yet recorded). Despite its small size it is unlike extant callitrichines in having a prominent cingulum hypocone. Based on the moderate development of the buccal crests, this animal likely had a diet similar to that of frugivorous callitrichines, and distinctly different from the more similarly-sized gummivores, Cebuella and C. jacchus. The phyletic position of the new taxon is uncertain, especially given the autapomorphic character of the tooth as a whole. Nevertheless, its unusual morphology hints at a wholly original and hitherto unknown Amazonian fauna, and reinforces the impression of the geographic separation of the Amazonian tropics from the more geographically isolated southerly parts of the continent in Early Miocene times.
KW - Anthropoidea
KW - Paleobiogeography
KW - Paleobiology
KW - Platyrrhini
KW - South America
UR - http://www.scopus.com/inward/record.url?scp=85069636044&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85069636044&partnerID=8YFLogxK
U2 - 10.1016/j.jhevol.2019.05.016
DO - 10.1016/j.jhevol.2019.05.016
M3 - Article
C2 - 31446974
AN - SCOPUS:85069636044
SN - 0047-2484
VL - 134
JO - Journal of Human Evolution
JF - Journal of Human Evolution
M1 - 102628
ER -