(8)
Nannoliths (5)
Ceratolithaceae (2)
Amaurolithus (4)
Amaurolithus tricorniculatus
Description: Right arm extended into apical spur.
Remarks:
Range: NN11B to 14.
Variant: A. bizarrus (Bukry, 1973) Gartner and Bukry, 1975 [Ceratolithus] - ornate A. tricorniculatus, with additional spines.