Английская Википедия:Coeloscleritophoran

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Шаблон:Short description Шаблон:Paraphyletic group

The Coelosclerithophorans are a polyphyletic group of organisms bearing hollow sclerites made of aragonite, and with a supposedly distinctive microstructure.[1]

Their skeletons may be homologous to those of the molluscs,[2] and Halkieria looks very much like a polyplacophoran. The shells of this group and the molluscs appear to have originated in the same fashion.[2] However, there are several reasons to doubt this relationship,[3] many of which may not pass muster.[4]

There are two groups within the coeloscleritophorans: the Sachitids, to which Halkieria and Wiwaxia belong, and the Chancellorids. The Ediacaran fossil Ausia has been touted as an ancestral 'intermediate' between both of these groups.[5]

These are common constituents of Lower Cambrian small shelly fossil assemblages.

References

Шаблон:Reflist

Шаблон:Taxonbar

Шаблон:Paleo-mollusc-stub