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Kimberella
''Kimberella'' is a monospecific genus of bilaterian known only from rocks of the Ediacaran period. The slug-like organism fed by scratching the microbial surface on which it dwelt in a manner similar to the molluscs, although its affinity with this group is contentious.
Specimens were first found in Australia's Ediacara Hills, but recent research has concentrated on the numerous finds near the White Sea in Russia, which cover an interval of time from . As with many fossils from this time, its evolutionary relationships to other organisms are hotly debated. Paleontologists initially classified ''Kimberella'' as a type of jellyfish, but since 1997 features of its anatomy and its association with scratch marks resembling those made by a radula have been interpreted as signs that it may have been a mollusc. Although some paleontologists dispute its classification as a mollusc, it is generally accepted as being at least a bilaterian.
The classification of ''Kimberella'' is important for scientific understanding of the Cambrian explosion: if it was a mollusc or at least a protostome, the protostome and deuterostome lineages must have diverged significantly before . Even if it was a bilaterian but not a mollusc, its age would indicate that animals were diversifying well before the start of the Cambrian.
== Etymology ==
The genus is named after Mr. John Kimber, student, teacher, and collector who lost his life during an expedition to Central Australia in 1964. Originally it was described with the name ''Kimberia''.〔 Dr. N. H. Ludbrook drew attention to the fact that the name ''Kimberia'' is preoccupied by ''Kimberia'' Cotton and Woods, a turtle subgenus. Accordingly, the new name ''Kimberella'' was proposed by Mary Wade in 1972.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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