1. Soft unsegmented body is covered with mantle or Pellium.
  2. Ventral muscular foot present.
  3. Calcareous shell (external or internal) often present.
  4. Respiration by ctenidia or pulmonary sac.
  5. Excretion by kidneys.

Examples: Pila, Aplysia, Nucula

Related posts:

  1. Features of the phylum Arthropoda
  2. Features of phylum Platyhelminthes
  3. Features of phylum Nematoda
  4. Diagnostic features of phylum Porifera
  5. Features of Annelida

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