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Acrodus
ver. 1.1
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Order Hybodontiformes ZANGERL, 1981
Family Acrodontidae CASIER, 1959
Genus Acrodus AGASSIZ, 1837

Acrodus lateralis AGASSIZ, 1837/ Acrodus levis:
a; Middle Cretaceous (Cenomanian), Egindy-Say, Guriev region, W. Kazakhstan

b: Upper Triassic, Muschelkalk F., Heming, near Sarrebourg, France

a: 24.8 mm W, b: 10.5 mm W 20040203
Acrodus nobilis AGASSIZ, 1839: Lower Jurassic, Lyme Regis, England

37.6 mm W 20040203

Asteracanthus
ver. 1.1



Order Hybodontiformes ZANGERL, 1981
Family Acrodontidae CASIER, 1959
Genus Asteracanthus AGASSIZ, 1837
Asteracanthus sp.: Upper Jurassic, Purpeck Beds, Purpeck, Dorset, England

20110821

Hybodus
ver. 1.0



Order Hybodontiformes ZANGERL, 1981
Family Hybodontidae OWEN, 1846
Genus Hybodus AGASSIZ, 1837

a, Hybodus plicatiliss AGASSIZ, 1843: Upper Traassic, Muschelkalk Formation,Heming, near Sarrebourg, France
b, Hybodus sp.: Lower Lias Lyme Regis, England

a: 6.8 mm W, b: 21.5 mm W 20040203


Lissodus
ver. 1.0



Order Hybodontiformes ZANGERL, 1981
Family Polyacrodontidae GLÜCKMAN, 1964
Genus Lissodus BROUGH, 1935

Lissodus minimus (AGASSIZ, 1939)/ Polyacrodus minimus: Bathonian (Middle Jurassic), Sharps Hill Formation, Ditchley Road Quarry, Charlbury, Oxfordshire, England

10 mm W


Lonchidion
ver. 1.0



Order Hybodontiformes ZANGERL, 1981
Family Lonchidiidae HERMAN, 1977
Genus Lonchidion ESTES, 1964

Lonchidion selachos ESTES, 1964: Maarstrichtian/Danian, Dinasaur Beds, Hell Creek Formation. Harding Co. S.D.

4.8 mm W 20110901


Polyacrodus
ver. 1.0



Order Hybodontiformes ZANGERL, 1981
Family Polyacrodontidae GLÜCKMAN, 1964
Genus Polyacrodus JAEKEL, 1889

a, Polyacrodus torosus: Middle Cretaceous (Upper Albian), Kobay, E. Mangyshlak Penninsula, W. Kazakhstan
b, Polyacrodus sp.: Lower Cretaceous (Albian), Stary Oskol, Belgorod region

a1: 19.5 mm W, a2: 9.2 mm W, b: 26 mm W 20040203




"Hybodus" minor & Romphaiodon nicolensis



"Hybodus" minor AGASSIZ, 1837: Lower Cretaceous, Hastings Beds, Ashdown Sands, Hastings, Sussexs, England

3 mm W
Romphaiodon nicolensis: Upper Triassic (Rhaetian), Saint Nicholas de la Port, France

a: 2.1 mm H, b: 2.4 mm H
Ref., Guillaume Guinot and Henri Cappetta, Microscopy Research and Technique Volume 74, Issue 2, pages 196-205, February 2011



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20120701 Fumio Nakagawa

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