Topic
Nothropus
About: Nothropus is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 63 citations.
Papers
TL;DR: Phylogenetic analysis places the new genus and species of nothrotheriine sloth from riverbank deposits of the Río Acre region of Peru in western Amazonia as sister group to the (Pronothrotherium (NothroTheriops + Nothratherium)) clade.
Abstract: The nothrotheriine sloth from riverbank deposits of the Rio Acre region of Peru in western Amazonia was originally assigned to Nothropus priscus Burmeister, 1882. Although relatively complete, with essentially the pes unknown, its description was accompanied only by limited information on its cranial remains. The remains of this sloth, actually of late Miocene age, were extensively prepared. Sub- sequent analysis indicates that its original assignment is incor- rect and that it belongs to a new genus and species, which is distinguished from other nothrotheriines by the following (among other) features: notably domed braincase; depressed, narrow snout; lack of parietal ⁄alisphenoid contact; ulna with prominently projecting anconeal process; distal position of femoral greater trochanter; medial articular condyle of femur butts against patellar trochlea. Phylogenetic analysis places the new genus and species as sister group to the (Pronothro- therium (Nothrotheriops + Nothrotherium)) clade.
67 citations
TL;DR: Two femora recovered from the Pleistocene of Santa Fe Province Argentina are described and a taxonomic assignation for them is provided, and some taxonomic and biogeographical aspects of these finds are discussed.
Abstract: The aim of this contribution is to describe two femora (MACN Pv 14148 and MACN Pv 14149 ) recovered from the Pleistocene of Santa Fe Province Argentina, provided a taxonomic assignation for them, and to discuss some taxonomic and biogeographical aspects of these finds. The general morphology of the femora more closely resembles the femur of Nothrotheriops (Xenarthra, Tardigrada, Nothrotheriidae) than any of the other known South American late Pleistocene nothrotheres. Although a bit larger, both specimens are also more similar in size to those of Nothrotheriops shastensis and share several features with this species. Based on their morphology the femora could be referred to Nothrotheriops, a genus exclusively recorded from the Pleistocene of North America, making this the first record of the genus outside of its known geographical distribution. However an alternative hypothesis is also plausible: the assignation of MACN Pv 14148 and MACN Pv 14149 to other Nothrotheriinae, i.e., Nothropus, which was recorded from the same beds of the femora but was determined on a mandibular fragment.
16 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2015 | 1 |
| 2011 | 1 |