expand Biota
expand Animalia
expand Echinodermata
expand Asterozoa
expand Arthropoda
expand Crustacea
expand Multicrustacea
expand Malacostraca
expand Eumalacostraca
expand Eucarida
expand Decapoda
expand Pleocyemata
▪ Natantia [objective synonym]
expand Peracarida
expand Amphipoda
expand Gammaridea
expand Senticaudata
expand Corophiida
expand Amphilochidea
expand Amphilochida
expand Cumacea
expand Isopoda
▪ Mysidacea [objective synonym]
expand Mollusca
expand Bivalvia
expand Heterodonta
expand Euheterodonta
expand Imparidentia
expand Gastropoda
expand Caenogastropoda
expand Neogastropoda
expand Littorinimorpha
expand Heterobranchia
expand Aculifera
expand Aplacophora
▪ Chaetodermomorpha [subjective synonym]
expand Annelida
expand Polychaeta
expand Errantia
expand Phyllodocida
expand Sedentaria
expand Scolecida
▪ Scalibregmidae [objective synonym]
▪ Questidae [subjective synonym]
expand Canalipalpata
expand Terebellida
expand Terebellomorpha
expand Sabellida
▪ Spirorbidae [lexical variant]
expand Cnidaria