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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.

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.

Fig. S4: Biotite Mg/Mg+Fe+Mn vs Mn diagram of P2 ash layers.

Fig. S5: Biotite Mg/Mg+Fe+Mn vs K+Na+Ca diagram of P2 ash layers.

Fig. S3: Biotite Mg/Mg+Fe+Mn vs Al diagram of P2 ash layers.

Fig. S2: Stratigraphic logs of the studied sites.

Fig. S1: 39Ar–40Ar age spectrum of the biotite separate of the tephra layer LB-T11.

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 on 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.

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 on 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.