Myida Explained

Myida (formerly Myoida) is an order of saltwater and freshwater clams, marine and freshwater bivalve molluscs in the subclass Heterodonta. The order includes such bivalves as soft-shell clams, geoducks and shipworms.

Description

They are burrowing molluscs with well-developed siphons. The shell is relatively soft and lacks a nacreous layer. Some species have a single cardinal tooth.^[1]

Superfamilies and families

Superfamilies and families within the Myida include:^[2]

• Superfamily: Dreissenoidea
  • Family: Dreissenidae
• Superfamily: Myoidea
  • Family: Corbulidae
  • Family: Myidae
  • Family: †Pleurodesmatidae
  • Family: †Raetomyidae
• Superfamily: Pholadoidea
  • Family: Pholadidae
  • Family: Teredinidae
  • Family: Xylophagaidae
• Superfamily: †Pleuromyoidea
  • Family: †Ceratomyidae
  • Family: †Pleuromyidae
  • Family: †Vacunellidae

References

• Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979

External links

• Animaldiversity
• Taxonomicon

Notes and References

1. Book: Barnes, Robert D. . 1982 . Invertebrate Zoology . Holt-Saunders International . Philadelphia, PA. 431. 0-03-056747-5.
2. Web site: WoRMS - World Register of Marine Species - Myida. www.marinespecies.org. 2019-04-03.