Ptychoderidae

family of hemichordates

Ptychoderidae is a family of acorn worms. ==Genera and species== The World Register of Marine Species lists the following: ===Balanoglossus=== Contains the following species: Balanoglossus apertus (Spengel, 1893) Balanoglossus aurantiacus (Girard, 1853) Balanoglossus australiensis (Hill, 1894) Balanoglossus borealis (Willey, 1899) Balanoglossus capensis (Gilchrist, 1908) 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 (Gilchrist, 1908) 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 (Willey, 1931) Glossobalanus crozieri van der Horst, 1924 Glossobalanus elongatus Spengel, 1904 Glossobalanus hartmanae Cameron & Ostiguy, 2013 Glossobalanus hedleyi (Hill, 1897) Glossobalanus indicus Rao, 1955 Glossobalanus marginatus Meek, 1922 Glossobalanus minutus Kowalevsky, 1866 Glossobalanus mortenseni van der Horst, 1932 Glossobalanus parvulus (Punnett, 1906) Glossobalanus ruficollis (Willey, 1899) Glossobalanus sarniensis (Koehler, 1886) 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 ==References==

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