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formerly placed in the Order: CEPHALASPIDEA, in the Subclass: OPISTHOBRANCHIA

Class:  Gastropoda  Cuvier, 1797
Subclass:  Heterobranchia  J.E. Gray, 1840
Clade:  Euthyneura  Spengel, 1881
Clade:  Euopisthobranchia  Jörger et al., 2010
Clade:  Cephalaspidea  P. Fischer, 1883

Superfamily:  Bulloidea  Lamarck, 1801
Family:  Bullidae  Lamarck, 1801


Bulla punctulata
       

Superfamiliy:  Philinoidea  J.E. Gray, 1850
Family:  Aglajidae  Pilsbry, 1895 (1847)


Navanax aenigmaticus
           

 
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