Directory
References
Discover
Notaspidea
gastropod order
Learn about this topic in these articles:
annotated classification
- In gastropod: Classification
Order Notaspidea Shell and gill usually present; no parapodia (extensions of foot); sperm groove open; shell prominent, reduced, or hidden by mantle; 2 families. Order Sacoglossa One file of radular teeth; sperm duct a closed tube; shell reduced to bivalved (Juliidae); many feed by sucking juices…
Read More