Distribution of fossil marine vertebrates in Cerro Colorado, the type locality of the giant raptorial sperm whale Livyatan melvillei (Miocene, Pisco Formation, Peru)

Giovanni Bianucci (1) , Claudio Di Celma , Walter Landini (1) , Klaas Post , Chiara Tinelli (1) , Christian de Muizon (2) , Karen Gariboldi (1) , Elisa Malinverno (3) , Gino Cantalamessa (4) , Anna Gioncada (1) , Alberto Collareta (1) , Rodolfo-Salas Gismondi (5) , Rafael Varas-Malca (5) , Mario Urbina (5) , Olivier Lambert (6)

1 Dipartimento di Scienze della Terra [Pisa]
2 CR2P - Centre de Recherche en Paléontologie - Paris
3 UNIMIB - Università degli Studi di Milano-Bicocca = University of Milano-Bicocca
4 UNICAM - Università degli Studi di Camerino = University of Camerino
5 MHN - Museo de Historia Natural de Lima
6 RBINS - Royal Belgian Institute of Natural Sciences

Hundreds of fossil marine vertebrates cropping out at Cerro Colorado (Pisco Basin, Peru) are identified and reported on a 1:6500 scale geological map and in a joined stratigraphic section. All the fossils are from the lower strata of the Pisco Formation, dated in this area to the late middle or early late Miocene. They are particularly concentrated (88%) in the stratigraphic interval from 40 to 75 m above the unconformity with the underlying Chilcatay Formation. The impressive fossil assemblage includes more than 300 specimens preserved as bone elements belonging mostly to cetaceans (81%), represented by mysticetes (cetotheriids and balaenopteroids) and odontocetes (kentriodontid-like delphinidans, pontoporiids, ziphiids, and physeteroids, including the giant raptorial sperm whale Livyatan melvillei). Seals, crocodiles, sea turtles, seabirds, bony fish, and sharks are also reported. Isolated large teeth of Carcharocles and Cosmopolitodus are common throughout the investigated stratigraphical interval, whereas other shark teeth, mostly of carcharinids, are concentrated in one sandy interval. This work represents a first detailed census of the extraordinary paleontological heritage of the Pisco Basin and the basis for future taphonomic, paleoecological, and systematic studies, as well as a much needed conservation effort for this extremely rich paleontological site.

Mots clés: marine vertebrates; paleontological heritage; Peru; Miocene; fossils

Domaines: Paléontologie

Giovanni Bianucci, Claudio Di Celma, Walter Landini, Klaas Post, Chiara Tinelli, et al.. Distribution of fossil marine vertebrates in Cerro Colorado, the type locality of the giant raptorial sperm whale Livyatan melvillei (Miocene, Pisco Formation, Peru). Journal of Maps, 2015, 12 (3), pp.543-557. ⟨10.1080/17445647.2015.1048315⟩. ⟨hal-02612682⟩