Subterclass

Palaeoheterodonta (Freshwater mussels and brooch clams)

Gonidea angulata. Photo: (c) FreckLes, some rights reserved (CC BY-NC)

Palaeoheterodonta is a subclass of bivalve molluscs. It contains the extant orders Unionida (freshwater mussels) and Trigoniida. They are distinguished by having the two halves of the shell be of equal size and shape, but by having the hinge teeth be in a single row, rather than separated into two groups, as they are in the clams and cockles.

— Wikipedia

Humboldt Life
- Kingdom: Animalia (Animals)
  - Phylum: Mollusca (Molluscs)
    - Class: Bivalvia (Bivalves)
      - Subclass: Autobranchia
        Infraclass: Heteroconchia
        Subterclass: Palaeoheterodonta (Freshwater mussels and brooch clams)
        Order: Unionida (Freshwater mussels) (2)

Subtaxa

Order: Unionida (Freshwater mussels)

Subterclass

Palaeoheterodonta (Freshwater mussels and brooch clams)

Subtaxa

Where in Humboldt

Discussion

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