trilobites
Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the At ...
comprising the genera ''
Bathycheilus
''Bathycheilus'' is a genus of trilobites in the order Phacopida. It was described by Holub in 1908.
Species
* ''Bathycheilus castilianus'' Hammann, 1983
* ''Bathycheilus gallica'' Dean, 1965
* ''Bathycheilus galticus'' Dean, 1965
* ''Bathyche ...