Opabinia regalis
Opabinia regalis est exstinctum arthropodum aevi Cambrici in Columbia Britannica inventum. Viginti tantum fossilia e sedimentis apothecariis (inter quae schisto Burgessensi) inventa sunt. Opabinia regalis habuit proboscidem, quinque oculos, caudam, corpus articulatum.
Fossile Opabiniae regalis in Instituto Smithsoniano exhibitum.
Bibliographia
recensere- J. Bergström, "The Cambrian Opabinia and Anomalocaris" in Lethaia vol. 20 (1987) pp. 187–188.
- D. E. G. Briggs, H. B. Whittington, "The affinities of the Cambrian animals Anomalocaris and Opabinia" in Lethaia vol. 20 (1987) pp. 185–186.
- Charles D. Walcott, "Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata" in Smithsonian Miscellaneous Collections vol. 57 (1912) pp. 145-228