Temporal range: 555 Ma
|Bomakellia kelleri, reconstructed as a rangeomorph|
Bomakellia kelleri is an Ediacaran fossil organism represented by only one specimen approximately 9 cm long from the Ust'-Pinega Formation of the Syuzma River and it has similarity to Mialsemia semichatovi from Yorga Formation of the Ediacaran (Vendian) siliciclastic sediments exposed on the Zimnie Gory locality, White Sea of northern Russia and these rocks are dated .
It was originally classified by Mikhail A. Fedonkin as belonging to the problematic Arthropod Class "Paratrilobita." Indeed, a study by B. M. Waggoner even concluded that Bomakellia was a primitive anomalocarid and he went on to identify ridges in the cephalon as being eyes, making this creature the earliest known animal with sight. But this hypothesis has not reached acceptance, nor acknowledgement.
Closer examination identified a tetraradial symmetry, and a frond-like morphology more reminiscent of Rangea – its current interpretation is as a rangeomorph frond, possibly closely related to the Chinese Paracharnia.
- M. A. Fedonkin (1985). "Systematic Description of Vendian Metazoa". Vendian System: Historical–Geological and Paleontological Foundation, Vol. 1: Paleontology. Moscow: Nauka, pp. 70–106.
- B. M. Waggoner (1996). "Phylogenic Hypotheses of the Relationships of Arthropods to Precambrian and Cambrian Problematic Fossil Taxa". Systematic Biology. Systematic Biology, Vol. 45, No. 2. 45 (2): 280–293. JSTOR 2413615. doi:10.2307/2413615.
- McMenamin, Mark A. S. (1998). The Garden of Ediacara. New York: Columbia University Press. ISBN 0-231-10559-2.
- Fryer, G. (1999). "Cambrian animals: evolutionary curiosities or the crucible of creation?" (PDF). Hydrobiologia. 403: 1–11. doi:10.1023/A:1003799411987.
- Dzik, J. (2002). "Possible ctenophoran affinities of the precambrian "sea-pen" Rangea". Journal of Morphology. 252 (3): 315–334. PMID 11948678. doi:10.1002/jmor.1108.