Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Annelida
Classis: Polychaeta
Subclassis: Echiura
Ordo: Heteromyota
Familia: Ikedidae
Genus: Ikeda
Name
Ikedidae Bock, 1942
Ikedidae is a family of spoon worms in the subclass Echiura. It is a monotypic family, the only genus 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 echurians, throwing the validity of the family Ikedidae into doubt. Nishikawa advocates that the family be regarded as a junior synonym of Echiuridae.[3]
Species
The World Register of Marine Species recognises the following species in the genus:-[1]
Ikeda pirotansis (Menon & DattaGupta, 1962)
Ikeda taenioides (Ikeda, 1904)
References
Tanaka, Masaatsu (2017). "Ikeda Wharton, 1913". WoRMS. World Register of Marine Species. Retrieved 19 February 2019.
Tanaka, Masaatsu (2017). "Ikedidae Bock, 1942". WoRMS. World Register of Marine Species. Retrieved 19 February 2019.
Nishikawa, Teruaki (2002). "Comments on the taxonomic status of Ikeda taenioides with some amendments in the classification of the phylum Echiura". Zoological Science. 19 (10): 1175–1180. doi:10.2108/zsj.19.1175.
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