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Aspidosiphon steenstrupii (Sipuncula).jpg
Aspidosiphon steenstrupii
Scientific classification e
Kingdom: Animalia
Phylum: Annelida
Class: Sipuncula
Order: Aspidosiphonida
Family: Aspidosiphonidae
Quatrefages, 1865

Aspidosiphonidae is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.[1][2][3][4][5]


The family Aspidosiphonidae is characterized by an oval disk with short tentacles, arranged in a crescent-shape made of an enclosed nuchal organ. It has a canal of sacs in the coelom, lying in a continuous band. The anal and caudal shield (at the anterior end) are both made up, not of chitin, but of a horny protein. It is of note that most, but not all, of the Aspidosiphonidae family has a caudal shield. The family also has two nephridia.[1][2][4][5]






  1. ^ a b Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. ISBN 0-12-282050-9
  2. ^ a b Ditadi, A.S.F. & Migotto, A.E. (1982): O Filo Sipuncula. Concelho Nacional de Desemvolvimento Cientifico e Tecnologico CNPq Brasilia. 43p.
  3. ^ Cutler, Edward B. & Gibbs, Peter E. (1985): A Phylogenetic analysis of higher taxa in the Phylum Sipuncula. Systematic Zoology 34(2):162-173.
  4. ^ a b c d e f g h i j k l m n o p q r s t u v w x Cutler, Edward B. & Cutler, Norma J (1989): A revision of the genus Aspidosiphon (Sipuncula: Aspidosiphonidaea). Proceedings of Biological Society of Washington 102(4):826-865 Bistor
  5. ^ a b c d e f g h i j k l m n o p q r s t u v w x Cutler, Edward B. (1994): The Sipuncula: their systematic, biology and evolution. 406p ISBN 0-8014-2843-2 Google Books
  6. ^ a b c d Cutler, Edward B. (1973): Sipuncula of the Western North Atlantic. Bulletin of American Museum of Natural History 152(3)103-201. New York.

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