For the first time, a comprehensive study of the fauna of fossil elasmobranchs from the Miocene Duho Formation of the Pohang Basin (South Korea) is provided. A new species of kitefin shark, Dalatias orientalis, is described. The association consists of 14 species, most of which are recorded in South Korea for the first time: Hexanchus griseus, Dalatias orientalis sp. nov., Mitsukurina owstoni, Otodus megalodon, Parotodus benedenii, Carcharodon hastalis, ‘Isurus’ planus, Isurus sp. 1, Isurus sp. 2, Cetorhinus huddlestoni, Carcharhinus aff. C. plumbeus, Carcharhinus aff. C. amblyrhynchos, Carcharhinus aff. C. altimus and Galeocerdo aduncus. The fauna combines taxa with different ecological and bathymetric characteristics. It is dominated by pelagic sharks with a high migratory capacity as well as by deep-sea species and inhabitants of the insular and continental shelves. The ecological and bathymetric features of the assemblage thus indicate a deep-water paleoenvironment. The recent goblin shark Mitsukurina owstoni is recorded for the first time from the Miocene epoch.

Late Paleocene elasmobranch findings are reported, along with reinterpretations of some previous taxonomic identifications in two main outcrops around Talcahuano area (Biobío region, Chile), and also delimiting the exposed lithostratigraphic units. Reviewed fossils are among 15 genera, comprising the species Paraorthacodus clarkii, Squalus minor, Squalus orpiensis, Centrophorus sp., Squatina prima, Anomotodon novus, Striatolamia striata, Carcharias spp., Sylvestrilamia teretidens, Odontaspis winkleri, Palaeohypotodus speyeri, Palaeohypotodus rutoti, Isurolamna inflata, Premontreia gilberti, Physogaleus secundus, Palaeogaleus vincenti and Hypolophodon sylvestris. The main elasmobranch assemblage, collected from the San Martín outcrop, indicates deposition in a shallow lower shoreface-uppermost offshore marine environment and warm-temperate water. Moreover, this elasmobranch assemblage constrains the age of Pilpilco Formation into the middle-late Thanetian, which implies a latest Thanetian-early Ypresian age for the overlying Curanilahue Formation and a Danian-early Thanetian hiatus with the underlying Quiriquina Formation.