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Rangeomorph
The rangeomorphs are a form taxon of frondose Ediacaran fossils that are united by a similarity to ''Rangea''. Some researchers, such as Pflug and Narbonne, suggest that a natural taxon Rangeomorpha may include all similar-looking fossils. Although the evolution of sex took place before the origin of animals, and evidence of sexual reproduction is observed in red algae , news articles have suggested that rangeomorphs were among the first organisms to reproduce sexually.〔Mitchell, Emily G., et al. "Reconstructing the reproductive mode of an Ediacaran macro-organism." (2015).〕
Rangeomorphs are a key part of the Ediacaran biota which survived about 30 million years, until the base of the Cambrian . They were especially abundant in early Ediacaran Mistaken Point assemblage found in Newfoundland.〔
==Body plan==
Rangeomorphs consist of branching "frond" elements, each a few centimetres long, each of which is itself composed of many smaller branching tubes held up by a semi-rigid organic skeleton. This self-similar structure proceeds over four levels of fractality, and could have been formed using fairly simple developmental patterns.〔
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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