Echinoneus
Echinoneus is a genus of echinoderms belonging to the family Echinoneidae. The genus has almost cosmopolitan distribution. Species:

Echinoneus burgeri 
Echinoneus cyclostomus 
Echinoneus robustus 
Echinoneus rojasi 
Echinoneus sanchezi 
Echinoneus tenuipetalum

References

Echinoneoida
Echinoidea genera