Middle Eocene vertebrate fauna from the Aridal Formation, Sabkha of Gueran, southwestern Morocco Author Zouhri, Samir Author Gingerich, Philip D. Author Khalloufi, Bouziane Author Bourdon, Estelle Author Adnet, Sylvain Author Jouve, Stéphane Author Elboudali, Najia Author Amane, Ayoub Author Rage, Jean-Claude Author Tabuce, Rodolphe text Geodiversitas 2021 2021-03-11 43 5 121 150 journal article 7746 10.5252/geodiversitas2021v43a5 e42658a2-0e15-4e90-9bc5-0d00cbcbd781 1638-9395 4605963 urn:lsid:zoobank.org:pub:697FC553-E37B-4EF9-97A4-950E4DEE246C Otodus ( Carcharocles ) cf. sokolowi (Jaekel, 1895) EXAMINED MATERIAL. — Around twenty broken isolated teeth, figured material includes FSAC Bouj-320, 321 and 322 . DESCRIPTION Teeth can reach up to 10 cm in height, displaying a large triangular cusp with well-marked and regular serrations on the cutting edges and a pair of lateral cusplets ( Fig. 2A ). Cusplets are not very high when conserved and often divergent in lateral teeth ( Fig. 2A ) to less developed in anterior teeth ( Fig. 2B ). REMARKS Teeth of Otodus ( Carcharocles ) cf. sokolowi are relatively common around the archaeocete carcasses ( Fig. 2 A-C). Case & Cappetta (1990) have discussed about the taxonomic distinctness of Otodus ( Carcharocles ) sokolowi compared to the other Eocene species of subgenus, and in particularly with the smaller and coeval species Otodus ( Carcharocles ) auriculatus (Blainville, 1818) . Otodus ( Carcharocles ) sokolowi appears widely distributed and relatively common in the tropical marine realm since the GEA-C (uppermost Bartonian-lowermost Priabonian) and throughout the Priabonian successions (GE D-G, BQ, QS) according to Underwood et al. (2011) , southwestern Morocco included ( Adnet et al. 2010 ). However this species seems relatively discrete in older deposits, as in the MI ( Underwood et al. 2011 ). Its occurrence in Bartonian of Gueran, Morocco , testify of its spatial expansion along the Tethysian coasts during the Bartonian.