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Geology and paleontology of late Cenozoic marine deposits in the Sacaco area (Peru)
ZusammenfassungPaläontologische, stratigraphische und geochronologische (K-Ar) Daten belegen ein obermiozänes und pliozänes Alter der Pisco-Formation. Die Sequenz wird etwa 350 m mächtig und besteht
Craniodental anatomy of late Oligocene archaeohyracids (Notoungulata, Mammalia) from Bolivia and Argentina and new phylogenetic hypotheses
TLDR
A cladistic analysis performed on archaeohyracids and hegetotheriids supports for the first time the existence of a clade of late archaeohiracids (post-Mustersan), which is the sister taxon of all hegettheriids.
BIOCHRONOLOGICAL RELATIONSHIPS OF THE EARLIEST SOUTH AMERICAN PALEOGENE MAMMALIAN FAUNAS
Abstract:  The oldest Cenozoic mammalian assemblages in South America have been recovered from levels of the Hansen Member of the Salamanca Formation, Punta Peligro locality in Argentina, and from
Late Oligocene mesotheriids (Mammalia, Notoungulata) from Salla and Lacayani (Bolivia): implications for basal mesotheriid phylogeny and distribution
TLDR
For the first time, a large collection of basal mesotheriids yielded by the Bolivian Salla beds and previously referred to T. spegazzinianus was included in a large-scale analysis, leading to the recognition of a unique new species in the locality of Salla-Luribay and the distinction of the new Salla species from the Patagonian species T.—spegazinianus.
The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti) a Cetotheriidae s.s. from the early Pliocene of Peru.
TLDR
A parsimony analysis of 101 morphological characters of the skull, auditory area and dentary tested on 23 taxa confirms the paraphyly of the Cetotheriidae as traditionally defined and suggests that six of the studied fossil baleen mysticetes constitute a clade.
The giant bite of a new raptorial sperm whale from the Miocene epoch of Peru
This corrects the article DOI: 10.1038/nature09067
Mayulestes ferox, a borhyaenoid (Metatheria, Mammalia) from the early Palaeocene of Bolivia. Phylogenetic and paleobiologic implications
TLDR
Comparison with other borhyaenoid taxa indicates that the lack of tympanic process of the alisphenoid is in fact a plesiomorphic character state for the superfamily, and it is suggested that this feature appeared several times during marsupial evolution.
Macroraptorial sperm whales (Cetacea, Odontoceti, Physeteroidea) from the Miocene of Peru
TLDR
A phylogenetic analysis based on 53 characters and 21 physeteroid species confirms the monophyly of Acrophyseter and groups this genus with the larger, middle to late Miocene macroraptorial stem physeteroids Brygmophyseter and Zygophyseter.
CLADISTIC ANALYSIS OF DASYUROMORPHIAN (MARSUPIALIA) PHYLOGENY USING CRANIAL AND DENTAL CHARACTERS
TLDR
For some groups, notably Dasyuridae and a dasyurid clade inclusive of all modern subfamilies, the synapomorphic nature of some derived features appears to be robust, even where they also are present in some outgroup taxa.
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