The Order Haplopharyngida is further organized into finer groupings including:
- Family (1): Haplopharyngidae
- Species: ZipcodeZoo has pages for 3 species and subspecies in the Order Haplopharyngida.
At least 3 species and subspecies belong to the Family Haplopharyngidae.
More info about the Family Haplopharyngidae may be found here.
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