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5. Comparación estadística de la infección por la viruela del mono (MPOX) entre Norteamérica y Sudamérica

Author

Marín-Machuca, Olegario, primary, Ortiz-Guizado, Julia Iraida, additional, Alvarado-Zambrano, Fredy Aníbal, additional, Candela-Díaz, José Eduardo, additional, Chinchay-Barragán, Carlos Enrique, additional, Alvarado-Zambrano, Ricardo Arnaldo, additional, Apaza-Urbina, Mario Antonio, additional, Marín-Sánchez, Ulert, additional, Rojas Rueda, Maria del Pilar, additional, and Castillo-Peña, Alcides, additional

Published
2024
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8. 3D models related to the publication: A heavyweight early whale pushes the boundaries of vertebrate morphology

Author

Bianucci, Giovanni, primary, Lambert, Olivier, additional, Urbina, Mario, additional, Merella, Marco, additional, Collareta, Alberto, additional, Goussard, Florent, additional, Bennion, Rebecca, additional, Salas-Gismondi, Rodolfo, additional, Benites-Palomino, Aldo, additional, Post, Klaas, additional, de Muizon, Christian, additional, Bosio, Giulia, additional, Di Celma, Claudio, additional, Malinverno, Elisa, additional, Pierantoni, Pietro Paolo, additional, Maria Villa, Igor, additional, and Amson, Eli, additional

Published
2023
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11. A new platyrostrine sperm whale from the Early Miocene of the southeastern Pacific (East Pisco Basin, Peru) supports affinities with the southwestern Atlantic cetacean fauna

Author

Lambert, Olivier; https://orcid.org/0000-0003-0740-5791, Collareta, Alberto; https://orcid.org/0000-0002-6513-8882, Benites-Palomino, Aldo; https://orcid.org/0000-0002-5409-6322, Merella, Marco, de Muizon, Christian, Bennion, Rebecca; https://orcid.org/0000-0002-0910-1655, Urbina, Mario; https://orcid.org/0000-0002-1898-9051, Bianucci, Giovanni; https://orcid.org/0000-0001-7105-0863, Lambert, Olivier; https://orcid.org/0000-0003-0740-5791, Collareta, Alberto; https://orcid.org/0000-0002-6513-8882, Benites-Palomino, Aldo; https://orcid.org/0000-0002-5409-6322, Merella, Marco, de Muizon, Christian, Bennion, Rebecca; https://orcid.org/0000-0002-0910-1655, Urbina, Mario; https://orcid.org/0000-0002-1898-9051, and Bianucci, Giovanni; https://orcid.org/0000-0001-7105-0863

Abstract

Contrasting with their suction feeding modern relatives in the families Kogiidae and Physeteridae, Miocene physeteroids display a broad range of feeding strategies. Despite the continuous improvements of the fossil record, the transition from the earliest sperm whales to suction feeding forms as well as the once prominent macroraptorial forms remains poorly understood. In the present work, we investigate a partial sperm whale skull from Lower Miocene (Burdigalian) strata of the Chilcatay Formation of the East Pisco Basin, along the southern coast of Peru. Based on this specimen, we describe a new species in the genus Diaphorocetus Ameghino, 1894, which was previously known only by the holotype of Diaphorocetus poucheti (Moreno, 1892) from a roughly synchronous unit in Patagonia (Argentina). Differing from the latter in its smaller cranial dimensions, higher tooth count, and minor differences in the position of facial foramina, the new species Diaphorocetus ortegai n. sp. confirms a key character of D. poucheti, the marked dorsoventral flattening of the maxillary portion of the rostrum. Such cranial proportions suggest that, compared to other physeteroids, D. poucheti and D. ortegai n. sp. were more efficient at performing fast lateral sweeps of their rostra to capture small- to medium-sized prey items with their proportionally small teeth. Recovered as stem physeteroids in our phylogenetic analysis, these sister species contribute to the ecomorphological disparity of sperm whales during the Early Miocene, but without displaying any of the cranial and dental changes occurring in later, macroraptorial and suction feeding sperm whales. The description of a new species of Diaphorocetus from southern Peru increases the similarities between the toothed whale faunas from the local Chilcatay Formation and the Gaiman and Monte Leon formations of Argentinian Patagonia, pointing not only to dispersal routes between the southeastern Pacific and southwestern Atlantic during the

Published
2023

13. MUSM INV 297

Author

Collareta, Alberto, Bosio, Giulia, Varas-Malca, Rafael, Bianucci, Giovanni, Merella, Marco, Urbina, Mario, and Di Celma, Claudio

Abstract

3D model of the Aturia cf. cubaensis specimen MUSM INV 297, an internal mould of a phragmocone from the Middle Miocene portion of the Pisco Formation (Peru). This fossil is currently housed in the Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos (=MUSM, Jesús María, Lima, Peru). MUSM INV 297 is described in the following article: Collareta, A., Bosio, G., Varas-Malca, R., Bianucci, G., Merella, M., Urbina, M., Di Celma, C. (2023). The extinct nautiloid Aturia in the Middle Miocene of Pacific South America: new data from the Pisco Lagerstätte of Peru. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. DOI: 10.1127/njgpa/2023/1128 To correctly visualize the textured 3D model in a 3D software, the three uploaded files (.obj, .mtl and .jpg) should be downloaded and stored within a single folder without changing the corresponding file names.

Published
2023
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16. Sperm whales (Physeteroidea) from the Pisco Formation, Peru, and their trophic role as fat sources for late Miocene sharks

Author

Benites-Palomino, Aldo, Velez-Juarbe, Jorge, Altamirano-Sierra, Ali, Collareta, Alberto, Carrillo-Briceño, Jorge D, Urbina, Mario, University of Zurich, and Benites-Palomino, Aldo

Subjects
Sperm Whale, General Immunology and Microbiology, Fossils, Skull, Genetics and Molecular Biology, 1100 General Agricultural and Biological Sciences, General Medicine, 10125 Paleontological Institute and Museum, General Biochemistry, Genetics and Molecular Biology, 2300 General Environmental Science, 560 Fossils & prehistoric life, Palaeobiology, 1300 General Biochemistry, Genetics and Molecular Biology, 2400 General Immunology and Microbiology, Peru, General Biochemistry, Sharks, Animals, General Agricultural and Biological Sciences, General Environmental Science
Abstract

Shark–cetacean trophic interactions, preserved as bite marks in the fossil record, mostly correspond to isolated or fragmentary findings that bear limited information about major trophic patterns or roles. Here, we provide evidence of focalized foraging by sharks in the form of tooth bite marks over physeteroids fossil bones from the late Miocene of Peru. These findings indicate that sharks were targeting the forehead of coeval physeteroids to actively feed on their lipid-rich nasal complexes. Miocene physeteroids displayed a broad diversity, including giant predatorial forms, small benthic foragers and suction feeders. Like their extant relatives, these animals exhibited enlarged fatty forehead organs responsible for their sound production capabilities, thus evolving taxon-specific cranial architecture. Bite marks are found on the cranial bones where these structures were attached, indicating that sharks actively targeted this region; but also, in areas that would only be accessible following the consumption of the surrounding soft tissues. The shape of the bite marks and their distribution suggests a series of consecutive scavenging events by individuals of different shark species. Similar bite patterns can be recognized on other Miocene physeteroids fossils from across the globe, suggesting that sharks actively exploited physeteroid carcasses as fat sources.

Published
2022

19. Age and provenance of the Mio-Pleistocene sediments from the Sacaco area, Peruvian continental margin

Author

Ochoa, Diana, primary, DeVries, Thomas J., additional, Quispe, Kelly, additional, Barbosa-Espitia, Angel, additional, Salas-Gismondi, Rodolfo, additional, Foster, David A., additional, Gonzales, Renzo, additional, Revillon, Sidoine, additional, Berrospi, Raul, additional, Pairazamán, Luis, additional, Cardich, Jorge, additional, Perez, Alexander, additional, Romero, Pedro, additional, Urbina, Mario, additional, and Carré, Matthieu, additional

Published
2022
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21. Age and provenance of the Mio-Pleistocene sediments from the Sacaco area, Peruvian continental margin

Author

Ochoa, Diana, Devries, Thomas J., Quispe, Kelly, Barbosa-espitia, Angel, Salas-gismondi, Rodolfo, Foster, David A., Gonzales, Renzo, Revillon, Sidoine, Berrospi, Raul, Pairazaman, Luis, Cardich, Jorge, Perez, Alexander, Romero, Pedro, Urbina, Mario, Carre, Matthieu, Ochoa, Diana, Devries, Thomas J., Quispe, Kelly, Barbosa-espitia, Angel, Salas-gismondi, Rodolfo, Foster, David A., Gonzales, Renzo, Revillon, Sidoine, Berrospi, Raul, Pairazaman, Luis, Cardich, Jorge, Perez, Alexander, Romero, Pedro, Urbina, Mario, and Carre, Matthieu

Abstract

Over the last decades, rocks from the East Pisco Basin (EPB), on the Central Peruvian coast (13 degrees-16 degrees S), have yielded an abundant and diverse collection of coastal-marine fossils, which are key for characterizing the onset and evolution of the modern Humboldt Current. Despite its paleontological richness, and after almost 40 years of study, the spatio-temporal context of the deposits of the southern part of the EPB (Sacaco area) remains only broadly constrained, being mostly tailored to particular vertebrate-rich levels occurring throughout the area. Here we build a composite stratigraphic section for the Sacaco area including three lithostratigraphic units (Pisco, Caracoles, and Pongo formations), which documents several discontinuities and intraformational unconformities. We infer depositional ages based on new radiometric (U-Pb), isotopic (Sr) and biostratigraphic data, synthesize previous litho-, chemo-, and bio-stratigraphic studies, and present a comprehensive chronostratigraphic review of the Mio-Pleistocene record for the Sacaco sub-basin that allows us to identify various local and basinal events. Our results indicate that, in the Sacaco area, the Pisco Formation ranges from -9.6 to 4.5 Ma, the overlying Caracoles Formation from 2.7 to -1.9 Ma, and the Pongo Formation accumulated from -1.9 up to at least 1.4 Ma. These sedimentary successions accumulated in a continually subsiding setting and show a shallowing-upwards trend. Zircon U-Pb provenance analysis mainly record Neoproterozoic, Cretaceous, and Mio-Pleistocene populations, revealing discrete up-section changes in source areas. Mio-Pleistocene and Cretaceous sources are continuously present, while older recycled-orogen sources vary through time in presence and abundance, indicating either paleogeographic changes or source exhaustion.

Published
2022
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22. Descriptions and Measurements from Sperm whales (Physeteroidea) from the Pisco Formation, Peru, and their trophic role as fat sources for late Miocene sharks

Author

Benites-Palomino, Aldo, Velez-Juarbe, Jorge, Altamirano-Sierra, Ali, Collareta, Alberto, Carrillo-Briceño, Jorge D., and Urbina, Mario

Subjects
Data_FILES, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, GeneralLiterature_MISCELLANEOUS
Abstract

This file includes the description of the referred specimens, measurements and additional photos

Published
2022
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24. A puzzling occurrence of the bite mark ichnogenus Linichnus from the Lower Miocene Chilcatay Formation of Peru

Author

Collareta, Alberto, Carnevale, Giorgio, Bianucci, Giovanni, Varas-Malca, Rafael, Altamirano-Sierra, Alí, Urbina, Mario, and Di Celma, Claudio

Abstract

An upper anterior tooth of Cosmopolitodus hastalis (Elasmobranchii: Lamnidae) from Burdigalian strata of the shallow-marine Chilcatay Formation exposed at Zamaca (East Pisco Basin, Peru) exhibits the remarkable occurrence of a serrated bite mark consistent with Linichnus serratus (Praedichnia: Machichnidae). In marine successions of Cenozoic age, traces belonging to the ichnogenus Linichnus are typically found occurring on the bones of marine mammals and interpreted as due to predation or scavenging by sharks provided with smooth-edged (Linichnus bromleyi) or denticulated (L. serratus) teeth. Only a few fossil shark teeth exist preserving serrated bite marks, all of which have been interpreted as due to self-biting, which may occur when a shark loses a tooth while feeding and accidentally bites into it. Since C. hastalis is a smooth-toothed species, self-biting cannot explain our unusual find of L. serratus, which in turn may either reflect some kind of trophic interaction between large carnivorous sharks (with a late juvenile or young adult C. hastalis being fed upon by another elasmobranch, possibly a large-sized carcharhinid) or testify to accidental biting during multispecies shark scavenging on the carcass of a third organism that did not get preserved alongside the bitten tooth.

Published
2023
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25. Laterally-Continuous Dolomite Layers of the Miocene Pisco Formation (East Pisco Basin, Peru): A Window into Past Cyclical Changes of the Diagenetic Environment

Author

Malinverno, Elisa, primary, Bosio, Giulia, additional, Gioncada, Anna, additional, Cimò, Raffaella, additional, Andò, Sergio, additional, Mariani, Luca, additional, Coletti, Giovanni, additional, Boschi, Chiara, additional, Gariboldi, Karen, additional, Galimberti, Lucia, additional, Bianucci, Giovanni, additional, Urbina, Mario, additional, and Di Celma, Claudio, additional

Published
2022
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26. Correction to: Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record

Author

Ochoa, Diana, primary, Salas-Gismondi, Rodolfo, additional, DeVries, Thomas J., additional, Baby, Patrice, additional, de Muizon, Christian, additional, Altamirano, Alí, additional, Barbosa-Espitia, Angel, additional, Foster, David A., additional, Quispe, Kelly, additional, Cardich, Jorge, additional, Gutiérrez, Dimitri, additional, Perez, Alexander, additional, Valqui, Juan, additional, Urbina, Mario, additional, and Carré, Matthieu, additional

Published
2021
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27. Ghosts of the Holobiont: Borings on a Miocene Turtle Carapace from the Pisco Formation (Peru) as Witnesses of Ancient Symbiosis.

Author

Collareta, Alberto, Varas-Malca, Rafael, Bosio, Giulia, Urbina, Mario, and Coletti, Giovanni

Subjects
TURTLES, MIOCENE Epoch, FOSSIL bones, SEA turtles, SYMBIOSIS, TURTLE populations, OLIGOCENE Epoch, TRACE fossils
Abstract

In spite of the widespread occurrence of epibiotic turtle barnacles (Coronuloidea: Chelonibiidae and Platylepadidae) on extant marine turtles (Chelonioidea: Cheloniidae and Dermochelyidae), and although the association between these cirripedes and their chelonian hosts has existed for more than 30 million years, only a few studies have investigated the deep past of this iconic symbiotic relationship on palaeontological grounds. We describe probable platylepadid attachment scars in the form of hemispherical/hemiellipsoidal borings on an Upper Miocene (Tortonian) fragmentary turtle carapace, identified herein as belonging to Cheloniidae, from the Pisco Lagerstätte (East Pisco Basin, southern Peru). When coupled with the available molecular data, this and other similar ichnofossils allow for hypothesising that platylepadid symbionts were hosted by sea turtles as early as in early Oligocene times and became relatively widespread during the subsequent Miocene epoch. Chelonian fossils that preserve evidence of colonisation by platylepadid epibionts in the form of pits on the turtle shell should be regarded as fossil holobionts, i.e., palaeontological witnesses of discrete communal ecological units formed by a basibiont and the associated symbionts (including the epibiota). A greater attention to the bone modifications that may be detected on fossil turtle bones is expected to contribute significantly to the emerging field of palaeosymbiology. [ABSTRACT FROM AUTHOR]

Published
2023
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28. Vertebrate Palaeoecology of the Pisco Formation (Miocene, Peru): Glimpses into the Ancient Humboldt Current Ecosystem

Author

Collareta, Alberto, primary, Lambert, Olivier, additional, Marx, Felix G., additional, de Muizon, Christian, additional, Varas-Malca, Rafael, additional, Landini, Walter, additional, Bosio, Giulia, additional, Malinverno, Elisa, additional, Gariboldi, Karen, additional, Gioncada, Anna, additional, Urbina, Mario, additional, and Bianucci, Giovanni, additional

Published
2021
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29. Sperm whales (Physeteroidea) from the Pisco Formation, Peru, and their trophic role as fat sources for late Miocene sharks.

Author

Benites-Palomino A, Velez-Juarbe J, Altamirano-Sierra A, Collareta A, Carrillo-Briceño JD, and Urbina M

Subjects
Animals, Fossils, Peru, Skull, Sharks, Sperm Whale
Abstract

Shark-cetacean trophic interactions, preserved as bite marks in the fossil record, mostly correspond to isolated or fragmentary findings that bear limited information about major trophic patterns or roles. Here, we provide evidence of focalized foraging by sharks in the form of tooth bite marks over physeteroids fossil bones from the late Miocene of Peru. These findings indicate that sharks were targeting the forehead of coeval physeteroids to actively feed on their lipid-rich nasal complexes. Miocene physeteroids displayed a broad diversity, including giant predatorial forms, small benthic foragers and suction feeders. Like their extant relatives, these animals exhibited enlarged fatty forehead organs responsible for their sound production capabilities, thus evolving taxon-specific cranial architecture. Bite marks are found on the cranial bones where these structures were attached, indicating that sharks actively targeted this region; but also, in areas that would only be accessible following the consumption of the surrounding soft tissues. The shape of the bite marks and their distribution suggests a series of consecutive scavenging events by individuals of different shark species. Similar bite patterns can be recognized on other Miocene physeteroids fossils from across the globe, suggesting that sharks actively exploited physeteroid carcasses as fat sources.

Published
2022
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30. Miocene fossils from the southeastern Pacific shed light on the last radiation of marine crocodylians.

Author

Salas-Gismondi R, Ochoa D, Jouve S, Romero PE, Cardich J, Perez A, DeVries T, Baby P, Urbina M, and Carré M

Subjects
Animals, Biological Evolution, Fresh Water, Phylogeny, Reptiles, Ecosystem, Fossils
Abstract

The evolution of crocodylians as sea dwellers remains obscure because living representatives are basically freshwater inhabitants and fossil evidence lacks crucial aspects about crocodylian occupation of marine ecosystems. New fossils from marine deposits of Peru reveal that crocodylians were habitual coastal residents of the southeastern Pacific (SEP) for approximately 14 million years within the Miocene ( ca 19 to 5 Ma), an epoch including the highest global peak of marine crocodylian diversity. The assemblage of the SEP comprised two long and slender-snouted (longirostrine) taxa of the Gavialidae: the giant Piscogavialis and a new early diverging species, Sacacosuchus cordovai . Although living gavialids ( Gavialis and Tomistoma ) are freshwater forms, this remarkable fossil record and a suite of evolutionary morphological analyses reveal that the whole evolution of marine crocodylians pertained to the gavialids and their stem relatives (Gavialoidea). This adaptive radiation produced two longirostrine ecomorphs with dissimilar trophic roles in seawaters and involved multiple transmarine dispersals to South America and most landmasses. Marine gavialoids were shallow sea dwellers, and their Cenozoic diversification was influenced by the availability of coastal habitats. Soon after the richness peak of the Miocene, gavialoid crocodylians disappeared from the sea, probably as part of the marine megafauna extinction of the Pliocene.

Published
2022
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