Description: Spinose holococcoliths, which are birefringent in side view. In plan view the coccoliths are non-birefringent with a distinct figure-of-eight shaped central structure.
Remarks:
Range:
Type species: Zygrhablithus bijugatus (Deflandre in Deflandre & Fert, 1954) [Zygolithus]
Neogene: Zygrhablithus
Paleogene: Zygrhablithus