title: Phascolionidae
text: # Phascolionidae
  
  Phascolionidae es una familia de Sipuncula o gusanos cacahuete.
  
  # Phascolionidae
  ## Descripción
  
  Carecen del nefridio izquierdo, los husos musculares y algunos retractores.
  
  # Phascolionidae
  ## Especies
  ### Onchnesoma
  
  * Onchnesoma intermedium Murina, 1976
  * Onchnesoma magnibathum Cutler, 1969
  * Onchnesoma squamatum oligopapillosum (Cutler, Cutler y Nishikawa, 1984)
  * Onchnesoma squamatum squamatum (Koren y Danielssen, 1875)
  * Onchnesoma steenstrupii nudum Cutler y Cutler, 1985
  * Onchnesoma steenstrupii steenstrupii Koren y Danielssen, 1875
  
  # Phascolionidae
  ## Especies
  ### Phascolion
  
  * Phascolion abnorme Fischer 1895
  * Phascolion bogorovi Murina 1973
  * Phascolion caupo Hendrix 1975
  * Phascolion cirratum Murina, 1968
  * Phascolion collare Selenka and de Man, 1883
  * Phascolion convestitum Sluiter, 1902
  * Phascolion cryptum Hendrix, 1975
  * Phascolion gerardi Rice, 1993
  * Phascolion hedraeum Selenka and de Man, 1883
  * Phascolion hibridum Murina 1981
  * Phascolion hupferi Fischer, 1895
  * Phascolion lucifugax Selenka and de Man, 1883
  * Phascolion lutense Selenka, 1885
  * Phascolion medusae Cutler and Cuttler, 1980
  * Phascolion megaethi Cutler & Cutler 1979
  * Phascolion microspheroidis Cutler and Duffy, 1972
  * Phascolion pacificum Murina, 1957
  * Phascolion pharetratum Sluiter 1902
  * Phascolion psammophilus Rice 1993
  * Phascolion rectum Ikeda, 1904
  * Phascolion robertsoni Stephen & Robertson 1952
  * Phascolion strombus (Montagu, 1804)
  * Phascolion tuberculosum Théel, 1875
  * Phascolion ushakovi Murina 1974
  * Phascolion valdiviae Fischer, 1916