After Hou & Bergström, 1997
<==o †Paracrustacea Hou & Bergström, 1997 `--o †Canadaspidida Novozhilov in Orlov, 1960 [incl. Hymenostraca Rolfe, 1969; Prophyllocarida Simonetta & Delle Cave, 1975] |--o †Canadasipididae Novozhilov in Orlov, 1960 | `--o †Canadaspis Novozhilov in Orlov, 1960 [Hymenocaris Salter, 1853] | |-- †C. perfecta (Walcott, 1912) [Hymenocaris perfecta Walcott, 1912] | `-- †C. laevigata (Hou & Bergström, 1991) [Perspicaris? laevigata Hou & Bergström, 1991] |--o †Hymenocarididae Haeckel, 1896 [=? Canadaspididae] | `-- †Hymenocaris vermicauda Salter, 1853 `--o †Perspicarididae Briggs, 1978 `--o †Perspicaris Briggs, 1977 |-- †P. recondita Briggs, 1977 |?- †P.? dilatus Robison & Richards, 1981 |?- †P.? ellipsopelta Robison & Richards, 1981 `?- †P.? laevigata Hou & Bergstrom, 1991
Reference(s):
- Conway Morris, S., 1993: The fossil record and early evolution of the Metazoa.
–Nature, vol. 361, 21 January, pp. 219-225 - Edgecombe, G. D., García-Bellido, D. C. & Paterson, J. R., 2011: A new leanchoiliid megacheiran arthropod from the lower Cambrian Emu Bay Shale, South Australia.
–Acta Palaeontologica Polonica: Vol. 56, #2, pp. 385-400 [doi: 10.4202/app.2010.0080] - Hou X. & Bergström, J., 1997: Arthropods of the Lower Cambrian Chengjiang fauna, southwest China.
–Fossils & Strata, Number 45, 22nd December 1997, pp. 1-116