Abstract

Homocrinus displays a number of characteristics inferred to be progenetic, including unusually small size, greatly elongated free brachials, enlarged proxistele, and absence of an anal tube. Accelerated ontogeny allowed Homocrinus to achieve early maturity and reproduction, ensuring survival in paleoenvironments characterized by frequent, episodic, high rates of sedimentation commonly unfavourable to other crinozoans.

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