Pluteus
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
This article from the 1928–1936 Soviet Medical Encyclopedia describes the pluteus as the larval stage of certain echinoderms, specifically sea urchins and ophiuroids. It notes that their structural similarity indicates phylogenetic relationship between these groups, distinguishing between Echinopluteus and Ophiopluteus.
Encyclopedia entry (1928–1936)
PLUTEUS, the name of the larval stage of certain echinoderms. The structure of these larvae is similar in forms that differ greatly in the adult state, which indicates their phylogenetic relationship. Such similarity is observed between the larvae of sea urchins (class Echinoidea) and ophiuroids (class Ophiuroidea). The pluteus of a sea urchin is called an Echinopluteus, and the pluteus of an ophiuroid is an Ophiopluteus (see figure).
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Cite this page
“Pluteus.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/pluteus/