Ikedidae 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
spoon worms
The Echiura, or spoon worms, are a small group of marine animals. Once treated as a separate phylum, they are now considered to belong to Annelida. Annelids typically have their bodies divided into segments, but echiurans have secondarily los ...
in the suborder
Bonelliida
Bonelliida is a suborder of the order Echiuroidea, an order of polychaete worms.
Families
The following families are classified within the suborder:
* Bonelliidae Lacaze-Duthiers, 1858
* Ikedidae Bock
Bock is a strong beer in Germany, u ...
. It is a
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 ...
family, the only
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
being ''Ikeda''. These worms burrow into soft sediment on the seabed.
Examination of the original material of ''
Ikeda taenoides'' by
Teruaki Nishikawa in 2002 showed that the longitudinal muscle layer lay between the circular layer and the oblique layer, as in all other
echiurans
The Echiura, or spoon worms, are a small group of marine animals. Once treated as a separate phylum, they are now considered to belong to Annelida. Annelids typically have their bodies divided into segments, but echiurans have secondarily los ...
, throwing the validity of the family Ikedidae into doubt. Nishikawa advocates that the family be regarded as a
junior synonym
The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently.
* In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linna ...
of
Echiuridae
Echiuridae is a family of spoon worms in the suborder Echiurida. It is a monotypic family, the only genus being ''Echiurus''. These worms burrow into soft sediment on the seabed.
Species
The World Register of Marine Species recognises the fol ...
.
Species
The
World Register of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms.
Content
The content of the registry is edited and maintained by scientific specialist ...
recognises the following
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
in the genus:-
[
*'' Ikeda pirotansis'' (]Menon Menon may refer to:
People
*Menon (subcaste), an honorary title accorded to some members of the Nair community of Kerala, southern India; used as a surname by many holders of the title
Surnamed
*Menon (surname), the surname of several people
Give ...
& DattaGupta, 1962)
*'' Ikeda taenioides'' (Ikeda Ikeda may refer to:
* Ikeda (surname), a Japanese surname
* Ikeda (comics), a character in ''Usagi Yojimbo''
* Ikeda clan, a Japanese clan
* Ikeda map, chaotic attractor
* ''Ikeda'' (annelid) a genus of the family Ikedidae
Places
* Ikeda, Osaka i ...
, 1904)
References
{{Taxonbar, from=Q21216489
Echiurans
Monogeneric protostome families