Scleroctenophora is an extinct class of stem group[1][2][3] ctenophores, known from the Chinese Maotianshan shales of Yunnan.

[4] It is dated to Cambrian Stage 3 and belongs to late Early Cambrian strata.

Scleroctenophorans are easily distinguished from other ctenophores by the presence of an internal skeleton that supports the body.

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