Synonyms: Aspidosiphon mokyevskii; Golfingia mokyevskii; Phascolion antillarum; Phascolosoma aethiops; Phascolosoma antillarum; Phascolosoma asser; Phascolosoma fuscum; Phascolosoma gaudens; Phascolosoma glans; Phascolosoma immodestum; Phascolosoma nigriceps; Phascolosoma onomichianum; Phascolosoma pelmum; Phascolosoma schmidti; Phascolosoma simile; Phascolosoma similis; Phascolosoma weldoni; Phascolosoma weldonii; Phymosoma antillarum; Phymosoma asser; Phymosoma onomichianum; Phymosoma pelma; Phymosoma weldonii; Physcosoma antillarum; Physcosoma asser; Physcosoma gaudens; Physcosoma onomichianum; Physcosoma pelma; Physcosoma similis; Physcosoma weldoni; Physcosoma weldonii; Sipunculus glans; Sipunculus immodestus