Cryptosula
Cryptosula is a genus of bryozoans belonging to the family Cryptosulidae. The genus has almost cosmopolitan distribution. Species:

Cryptosula cylindrica 
Cryptosula okadai 
Cryptosula pallasiana 
Cryptosula reticulata 
Cryptosula terebrata 
Cryptosula zavjalovensis

References

Bryozoan genera
Cheilostomatida