''Acanthotheelia'' is an extinct genus of

sea cucumber Sea cucumbers are echinoderms from the class (biology), class Holothuroidea ( ). They are benthic marine animals found on the sea floor worldwide, and the number of known holothuroid species worldwide is about 1,786, with the greatest number be ...

s which existed in Poland during the

Triassic The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is t ...

period. It contains the species ''Acanthotheelia spinosa'', ''Acanthotheelia spiniperjorata'', and ''Acanthotheelia anisica''.

References

Apodida Prehistoric sea cucumber genera Fossils of Poland Triassic echinoderms {{paleo-holothuroidea-stub