Craniscus

Craniscus is a genus of small brachiopods (lamp shells). The shell is approximately round to square with one side rounded. The ventral valve is approximately flat and attached to the underground by the entire surface. The outside of the dorsal valve is more or less conical, the inside is divided by three ridges that join in the center.^[1]

Craniscus Temporal range: Upper Jurassic–Recent PreꞒ Ꞓ O S D C P T J K Pg N
Craniscus tripartitus
Scientific classification
Kingdom:	Animalia
Phylum:	Brachiopoda
Class:	Craniata
Order:	Craniida
Family:	Craniidae
Genus:	Craniscus Dall, 1871
Species
C. tripartitus (Münster, 1840) type species = Crania tripartita, Lower Oxfordian C. suevica (Quenstedt, 1857) = Crania suevica , Upper Oxfordian C. japonicus (Adams, 1863) = Crania japonica, recent C. quadrangularis (Tate, 1893) = Crania quadrangularis non C. quadrangularis (Lundgren, 1885)