The Coelosclerithophorans are a polyphyletic group of organisms bearing hollow sclerites made of aragonite, and with a supposedly distinctive microstructure. Their skeletons may be homologous to those of the molluscs, and Halkieria looks very much like a polyplacophoran.
The Coelosclerithophorans are a polyphyletic group of organisms bearing hollow sclerites made of aragonite, and with a supposedly distinctive microstructure. Their skeletons may be homologous to those of the molluscs, and Halkieria looks very much like a polyplacophoran.
Source: Wikipedia "Coeloscleritophoran" · CC BY-SA 4.0
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