Ptychoderidae
Ptychoderidae is a family of acorn worms.The World Register of Marine Species lists the following:Balanoglossus
Contains the following species:
- Balanoglossus apertus
- Balanoglossus aurantiacus
- Balanoglossus australiensis
- Balanoglossus borealis
- Balanoglossus capensis
- Balanoglossus carnosus Müller in Spengel, 1893
- Balanoglossus clavigerus delle Chiaje, 1829
- Balanoglossus gigas Müller in Spengel, 1893
- Balanoglossus hydrocephalus van der Horst
- Balanoglossus misakiensis Kuwano, 1902
- Balanoglossus natalensis
- Balanoglossus occidentalis Ritter, 1902
- Balanoglossus proterogonius Belichov, 1928
- Balanoglossus robinii author unknown
- Balanoglossus salmoneus Belichov, 1928
- Balanoglossus stephensoni van der Horst, 1937
- Balanoglossus studiosorum van der Horst
Glossobalanus
Contains the following species:
- Glossobalanus alatus van der Horst
- Glossobalanus barnharti Cameron & Ostiguy, 2013
- Glossobalanus berkeleyi
- Glossobalanus crozieri van der Horst, 1924
- Glossobalanus elongatus Spengel, 1904
- Glossobalanus hartmanae Cameron & Ostiguy, 2013
- Glossobalanus hedleyi
- Glossobalanus indicus Rao, 1955
- Glossobalanus marginatus Meek, 1922
- Glossobalanus minutus Kowalevsky, 1866
- Glossobalanus mortenseni van der Horst, 1932
- Glossobalanus parvulus
- Glossobalanus ruficollis
- Glossobalanus sarniensis
- Glossobalanus williami Cameron & Ostiguy, 2013
Ptychodera
Contains the following species:
- Ptychodera bahamensis Spengel, 1893
- Ptychodera ceylonica author unknown
- Ptychodera erythrea Spengel
- Ptychodera flava Eschscholtz, 1825
- Ptychodera pelsarti Dakin, 1916
