''Aspidosiphonidae'' is a

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

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 "unispe ...

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. 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 The nephridium (plural ''nephridia'') is an invertebrate organ, found in pairs and performing a function similar to the vertebrate kidneys (which originated from the chordate nephridia). Nephridia remove metabolic wastes from an animal's body. Neph ...

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 ''Aspidosiphon elegans'' is a species of unsegmented benthic marine worm in the phylum Sipuncula, the peanut worms. It is a bioeroding species and burrows into limestone rocks, stones and corals. It occurs in the western Indo-Pacific region, the ...

'' (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'' de Quatrefages, 1865 * '' Aspidosiphon mexicanus'' Murina, 1967 * '' Aspidosiphon misakiensis'' 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'' 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'' (de Quatrefages, 1865)

Lithacrosiphon

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

References

External links

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