The Lower Eocene (Ypresian) Chondrichthyes from Egem, Belgium

Introduction p. 5Materials and Methods p. 5Terminology p. 6Abbreviations p. 6Geological overview of the Ampe Quarry at Egem, Belgium p. 7Tielt Formation p. 8Kortemark Silt Member p. 8Egemkapel Clay Member p. 9Hyon Formation p. 9Egem Sand Member p. 9Gentbrugge Formation p. 10The Pittem Clay Member p. 10Systematic Palaeontology p. 11Order Hexanchiformes Buen, 1926 p. 11Family Hexanchidae Grey, 1851 p. 11Hexanchus agassizi Cappetta, 1976 p. 11Weltonia burnhamensis Ward, 1979 p. 13Notorynchus serratissimus Agassiz, 1843 p. 15Order Squaliformes Goodrich, 1909 p. 17Family Squalidae Bonaparte, 1834 p. 17Squalus minor Leriche, 1905 p. 17Family Dalatiidae Grey, 1851 p. 20Isistius trituratus (Winkler, 1874) p. 20Order Squatiniformes Buen, 1926 p. 20Family Squatinidae Bonaparte, 1838b p. 20Squatina crassa Daimeries, 1889 p. 21Squatina prima (Winkler, 1874) p. 21Order Heterodontiformes Berg, 1937 p. 25Family Heterodontidae Grey, 1851 p. 25Heterodontus vincenti (Leriche, 1905) p. 26Order Orectolobiformes Compagno, 1973 p. 41Family Parascylliidae Gill, 1862b p. 41Pararhincodon ypresiensis Cappetta, 1976 p. 41Family Brachaeluridae Cappetta, 1987 p. 43Eostegostoma angustum (Nolf & Taverne) in Herman, 1977a p. 43Family Ginglymostomatidae Gill, 1862 p. 44Nebrius thielensis (Winkler, 1874) p. 44Protoginglymostoma ypresiensis (Casier, 1946) p. 47Family Rhincodontidae Garman, 1913 p. 47Paleorhincodon wardi Herman, 1974 p. 47Species List p. 49Acknowledgements p. 50References p. 51