Ptychodera is a genus of acorn worm.
Species Ptychodera bahamensis Spengel, 1893 Ptychodera ceylonica author unknown Ptychodera erythrea Spengel Ptychodera flava Eschscholtz, 1825 Ptychodera pelsarti Dakin, 1916
References http://jcs.biologists.org/cgi/content/abstract/s2-40/157/165
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