After Bulman, 1955, Parker, 1982, and Cameron, 2000-2004
<==o Hemichordata Bateson, 1885 [Stomochorda Dawydoff, 1948] (acorn worms; esiselkäjänteiset) |-- Planctosphaera pelagica Spengel, 1932 [Planctosphaeroidea: Planctosphaeridae] |== Enteropneusta Gegenbaur, 1870 [Enteropneusti Gegenbaur, 1870] (acorn worms; terhomadot) `-- Graptolithina Bronn, 1849 [Graptolitha (lapsus calami); Graptolithoidea Lapworth, 1875 sensu Beklemishev, 1951 and Mierzejewski, 2002-2004; Stomochorda Dawydoff, 1948 in partim; Pterobranchia Lankester, 1877] (graptolites and pterobranchs; graptoliitit ja siipikiduksiset)
Reference(s):
- Anonymous, 2004: Australian Faunal Directory. (Updated: 2004-06-22)
–iNet: Australian Covernment: Department of the Environment and Heritage: http://www.deh.gov.au/biodiversity/abrs/online-resources/abif/fauna/afd/group.html; [visited: 2004-06-22] - Bulman, O. M. B., 1955: Part V - Grapholithina, with sections on Enteropneusta and Pterobranchia. xviii-V101.
in Moore, R. C. (ed.), 1955: Treatise on Invertebrate Paleontology.
–University of Kansas Press and The Geological Society of America, Lawrence, Kansas, 1955. - Cameron, C. B., 2000: A comprehensive list of extant Hemichordata with links to images. (Updated: 2004-11)
–iNet: http://cluster3.biosci.utexas.edu/faculty/cameronc/Hemichordate.Species.html; [visited: 2005-02-23] - Parker, S. P. (ed.), 1982: Synopsis and classification of living organisms. Vols. 1 & 2
–McGrew-Hill Book Company