After Davidson, Peterson & Cameron, 1995
<==o Deuterostoma (deuterostomes; jälkisuiset) |-- Phoronida (tupsumadot) `--+-- Brachiopoda (lonkerojalkaiset) `--o Dexiothetica |?- †Vetulicolia Shu, Conway Morris, Han, Chen, Zhang, Zhang, Liu, Li & Liu, 2001 |?- †Mitrata [Calcichordata; Stylophora; Caroidea] (mitrates) |--+--+-- †Dinomischida | | `--+-- †Eldoniida | | `--+-- †Rotadiscida | | `-- †Paropsonemida | `--+-- †Cambroclaves | `--+-- †Heterostelea | `-- Echinodermata (spiny-skinned animals; piikkinahkaiset) `--+?- Planctosphaera pelagica Spengel, 1932 [Planctosphaeroidea: Planctosphaeridae] |-- 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) `--+-- Enteropneusta Gegenbaur, 1870 (acorn worms; terhomadot) `-- Chordata (selkäjänteiset)
Reference(s):
- 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. -
Conway Morris, S., 1993: The fossil record and early evolution of the Metazoa.
–Nature, vol. 361, 21 January, pp. 219-225 - Shu, D.-G., Conway Morris, S., Han, J., Chen, L., Zhang, X.-L., Zhang, Z.-F., Liu, H.-Q., Li, Y. & Liu, J.-N., 2001: Primitive deuterostomes from the Chengjiang Lagerstätte (Lower Cambrian, China).
–Nature: Vol. 414, pp. 419-424 - Shu, D.-G., Conway Morris, S., Zhang, X.-L., Chen, L., Li, Y. & Han, J., 1999: A pipiscid-like fossil from the Lower Cambrian of south China.
–Nature: Vol. 400, pp. 746-749 - –iNet: The Tree of Life Project: http://tolweb.org/