IRMNG taxon details
basis of record
Parker, S.P. (ed). (1982). Synopsis and Classification of Living Organisms. McGraw-Hill, New York. 2 volumes. note: as phylum [details]
additional source
McHugh, D. (1997). Molecular evidence that echiurans and pogonophorans are derived annelids. <em>Proceedings of the National Academy of Sciences of the United States of America.</em> 94: 8006-8009., available online at http://www.pnas.org/content/94/15/8006.short [details]
taxonomy source
Struck, T. H.; Schult, N.; Kusen, T.; Hickman, E.; Bleidorn, C.; McHugh, D.; Halanych, K. M. (2007). Annelid phylogeny and the status of Sipuncula and Echiura. <em>BMC Evolutionary Biology.</em> 7(1): 57., available online at https://doi.org/10.1186/1471-2148-7-57 [details]
Unreviewed
Taxonomic remark Once considered a separate phylum, demonstrated to be derived annelids by McHugh, 1997. Currently treated as a subclass of Polychaeta, refer WoRMS, 2017. [details]
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