''Aspidosiphonidae'' is a

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

of peanut worms. It is the only family in the

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

order Aspidosiphonida, which is in the class

Phascolosomatidea Phascolosomatidea is a subclass of the class Sipuncula, the peanut worms, containing two orders:- * Aspidosiphonida containing the single family Aspidosiphonidae ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the ...

.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto, A.E. (1982): O Filo Sipuncula. Concelho Nacional de Desemvolvimento Cientifico e Tecnologico CNPq Brasilia. 43p.Cutler, Edward B. & Gibbs, Peter E. (1985): A Phylogenetic analysis of higher taxa in the Phylum Sipuncula. Systematic Zoology 34(2):162-173.Cutler, Edward B. & Cutler, Norma J (1989): A revision of the genus Aspidosiphon (Sipuncula: Aspidosiphonidaea). Proceedings of Biological Society of Washington 102(4):826-86
Bistor
/ref>Cutler, Edward B. (1994): The Sipuncula: their systematic, biology and evolution. 406p
Google Books
/ref>

Description

The family Aspidosiphonidae is characterized by an oval disk with short tentacles, arranged in a crescent-shape made of an enclosed

nuchal organ The nuchal organ is a ciliated pit or groove present at the posterior end of the prostomium of annelid worms, some cephalopods, and other invertebrates. Annelids only possess one nuchal The nape is the back of the neck. In technical anato ...

. 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.

Species

Aspidosiphon

* '' Aspidosiphon albus'' Murina, 1967 (1973): Sipuncula of the Western North Atlantic. ''Bulletin of American Museum of Natural History'' 152(3)103-201. New York. * '' Aspidosiphon coyi'' de Quatrefages, 1865 * '' Aspidosiphon elegans'' (Chamisso and Eysenhardt, 1821) * '' Aspidosiphon exiguus'' Edmonds 1974 * '' Aspidosiphon fischeri'' Broeke, A. ten, 1925 * ''

Aspidosiphon gosnoldi ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Cutler, E., 1981 * '' Aspidosiphon gracilis'' (Baird, 1868) * ''

Aspidosiphon laevis ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' de Quatrefages, 1865 * ''

Aspidosiphon mexicanus ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Murina, 1967 * ''

Aspidosiphon misakiensis ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Ikeda 1904 * ''

Aspidosiphon muelleri ''Aspidosiphon muelleri'' is a species of unsegmented benthic marine worm in the phylum Sipuncula, the peanut worms. This worm is found in the eastern Atlantic Ocean, the Mediterranean Sea and in various locations in the Indo-Pacific region at de ...

'' Diesing 1851 * ''

Aspidosiphon parvulus ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Gerould, 1913 * ''

Aspidosiphon planoscutatus ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Murina, 1968 * ''

Aspidosiphon spiralis ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Sluiter, 1902 * ''

Aspidosiphon steenstrupii ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Diesing, 1859 * ''

Aspidosiphon tenuis ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Sluiter, 1886 * ''

Aspidosiphon thomassini ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Cutler and Cutler, 1979 * ''

Aspidosiphon venabulum ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Selenka & Bulow, 1883 * ''

Aspidosiphon zinni ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. (1977): British sipunculans. Academic Press. London. 35p. Ditadi, A.S.F. & Migotto ...

'' Cutler, 1969

Cloeosiphon

* ''

Cloeosiphon aspergillus ''Cloeosiphon'' is a genus of worms belonging to the family Aspidosiphonidae. The species of this genus are found in Indian and Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends f ...

'' (de Quatrefages, 1865)

Lithacrosiphon

* ''

Lithacrosiphon cristatus ''Lithacrosiphon'' is a genus of worms belonging to the family Aspidosiphonidae ''Aspidosiphonidae'' is a family of peanut worms. It is the only family in the monotypic order Aspidosiphonida, which is in the class Phascolosomatidea.Gibbs, P.E. ...

'' (Sluiter, 1902) * '' Lithacrosiphon maldivensis'' Shipley 1902

References

External links

Sipuncula LifeDesk: Aspidosiphonidae
{{Taxonbar, from=Q2341972 Sipunculans