Parapinnixa
Encyclopedia
Parapinnixa is a genus of crab
Crab
True crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" , or where the reduced abdomen is entirely hidden under the thorax...

 in the family Pinnotheridae
Pinnotheridae
Pinnotheridae is a family of pea crabs. Pea crabs are tiny soft-bodied crabs that live commensally in the mantles of certain bivalve molluscs...

. Originally described by Samuel Jackson Holmes
Samuel Jackson Holmes
Samuel Jackson Holmes was an American zoologist. He was at University of California, Berkeley. He was also a eugenicist.He was the son of Joseph Holmes and his wife Avis Folger née Taber...

 as Pseudopinnixa, he published the replacement name
Nomen novum
In biological nomenclature, a nomen novum , new replacement name is a technical term...

 Parapinnixa the following year, after learning of the senior homonym Pseudopinnixa Ortmann, 1894.

The genus contains the following species:
  • Parapinnixa affinis
    Parapinnixa affinis
    Parapinnixa affinis, the California Bay pea crab, is a species of pinnotherid crab endemic to Southern California. It is a small crab that lives commensally in the tube of a tube-dwelling worm...

    Holmes, 1900 – California Bay pea crab
  • Parapinnixa beaufortensis Rathbun, 1918
  • Parapinnixa bouvieri Rathbun, 1918
  • Parapinnixa cortesi Thoma, Heard & Vargas, 2005
  • Parapinnixa cubana Campos, 1994
  • Parapinnixa glasselli Garth, 1939
  • Parapinnixa hendersoni Rathbun, 1918
  • Parapinnixa magdalenensis Werding & Müller, 1990
  • Parapinnixa nitida (Lockington, 1876)
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