Elasmobranchs teeth from the Thanetian phosphatic serie of Jebel Dyr (Algerian-Tunisian border area); 14. Nebrius bequaerti; 15. Archaeomanta priemi; 16. Burnhamia daviesi; 17. Ginglymostoma subafricanum; 18. Myliobatis sulcidens; 21. Hemiscyllium daimeriesi; 23. Squatiscyllium nigeriensis. a: labial; b: lingual; c: lateral; d: occlusal; e: oral; f: basilar views.