Notorynchus primigenius Agassiz, 1835

Höltke, Olaf, Salvador, Rodrigo B. & Rasser, Michael W., 2023, Trophic relationships in the Early Miocene Upper Marine Molasse of Baden-Württemberg, Southwest Germany, with special emphasis on the elasmobranch fauna, Palaeontologia Electronica (a 46) 26 (3), pp. 1-38 : 30

Notorynchus primigenius Agassiz, 1835

Tooth type: Cutting-clutching.

The only extant relative is N. cepedianus (Péron, 1807) , which very often feeds on other elasmobranchs such as Myliobatis spp. , Dasyatis spp. and Squalus spp. (Ebert, 1991). Other prey items are bony fishes, squids ( Loligo spp. ), octopuses, crustaceans, gastropods, marine mammals (cetaceans and pinnipeds), agnathans and carrion (Ebert, 1991, 2003; Ebert et al., 2021). According to Cortés (1999), marine mammals and elasmobranchs are the staple food for this species, which has a TL of 4.7. This shark is the dominant elasmobranch in the nearshore marine environment, living from the surf line (less than 1 m depth) to at least 570 m depth, but mostly in less than 100 m depth (Ebert, 2003, Ebert et al., 2021).

ORDER SQUALIFORMES Goodrich, 1909

Family Echinorhinidae Gill, 1862

Genus Echinorhinus Blainville, 1816

Echinorhinus pfauntschi Pfeil, 1983

Tooth type: Cutting-clutching.

There are two recent species of Echinorhinus : E. cookei Pietschmann, 1928 and E. brucus (Bonnaterre, 1788) , living from 4 to 1100 m and from 10 to 1214 m depth (Ebert et al., 2021), respectively. The TL of E. cookie is circa 4.4 ±0.76 (Froese and Pauly, 2019) and that of E. brucus is 4.4 (Cortés, 1999). Both bony and cartilaginous fishes have been indicated as staple foods of the recent species (Cortés, 1999; Ebert et al., 2021).