Australian Biological Resources Study

Australian Faunal Directory


Regional Maps



After Edmonds (2000)
Members of the class Phascolosomatidea have tentacles that are not peripheral, but are arranged so as to form an arc enclosing the dorsal nuchal organ. Introvert hooks are recurved, usually with internal structure or markings and generally are arranged in rings; introvert hooks are absent in species of Antillesoma. The spindle muscle is attached posteriorly. Two orders are included: Phascolosomatiformes and Aspidosiphoniformes.


History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
12-Feb-2010 (import)