Cement glands

Cement glands are small organs found in Acanthocephala that are used to temporarily close the posterior end of the female after copulation.

[1] Cement glands are also mucus-secreting organs that can attach embryos or larvae to a solid substrate.

These can be found in frogs such as those in the genus Xenopus,[2] fish such as the Mexican tetra,[3] and crustaceans.

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Diagram of a male Pachysentis_lauroi showing the eight cements glands in a clustered arrangement below the anterior and posterior testes.
Diagram of a male P. lauroi showing the anterior and posterior testes, and eight cement glands in a clustered arrangement.