No abstract

One hundred and ninety-two fossil marine vertebrate specimens, preserved as bone elements cropping out at Cerro Los Quesos (Pisco Basin, Peru), are identified and reported in a 1:4,000 scale geological map and in the corresponding stratigraphic section. All the fossils originate from the Pisco Formation, which is dated in this area to the late Miocene (from 7.55 Ma to ≥ 6.71 Ma, based on 40Ar/39Ar analyses of three volcanic ash layers along the section). Specimens are particularly concentrated near the top of the two main hills, where the geologically youngest portion of the examined section crops out. The impressive fossil assemblage includes cetaceans (91.6%), represented by mysticetes (balaenopteroids and cetotheriids) and odontocetes (phocoenids, physeteroids, and ziphiids, including the holotype of Nazcacetus urbinai). Seals, a crocodile, a seabird, bony fish, and sharks are also reported. Isolated large teeth of Carcharocles and Cosmopolitodus are common and, in several instances, associated to mysticete skeletons. Together with a similar work recently published for the other late Miocene locality of Cerro Colorado, this work represents a case study for the detailed inventory of the extraordinary paleontological heritage of the Pisco Basin. As such, it constitutes the basis for future taphonomic, paleoecological, and systematic studies, as well as for a much needed conservation effort

No abstract

No abstract

No abstract

This contribution contains the 3D models of the isolated teeth attributed to stem representatives of the Cebuella and Cebus lineages (Cebuella sp. and Cebus sp.), described and figured in the following publication: Marivaux et al. (2016), Dental remains of cebid platyrrhines from the earliest late Miocene of Western Amazonia, Peru: macroevolutionary implications on the extant capuchin and marmoset lineages. American Journal of Physical Anthropology. http://dx.

Se describe un os quadratum izquierdo fósil asignado al género Pelecanus proveniente de los yacimientos de nivel Montemar de la formación Pisco, en la costa centro-sur del Perú (región Arequipa). El fósil fue comparado con las especies actuales Pelecanus thagus y P. occidentalis, y con P. schreiberi del Plioceno de América del Norte. Este el primer registro de un pelícano fósil en toda la costa peruana. Se analizó además la paleo-avifauna de la formación Pisco, concluyendo que las especies actuales que son endémicas de la corriente peruana se encontraban presentes desde al menos el Mioceno tardío (6 Ma).

No abstract