Keasius parvus (Leriche, 1908)

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 : 33

Keasius parvus (Leriche, 1908)

Tooth type: Clutching.

This is an extinct genus of basking sharks. Based on the morphology of teeth and gill rakers, the only recent relative taxon is Cetorhinus maximus (Gunnerus, 1765) , a plankton feeder that lives on the continental shelf and slope (Compagno et al., 2005; Ebert et al., 2021). Cetorhinus maximus can dive down to 1264 m depth (Ebert et al., 2021). During summer time, basking sharks can be found near the surface, whereas in winter they move to deeper waters (Compagno et al., 2005). Cetorhinus maximus has a TL of 3.2 (Cortés, 1999).