A taxonomic classification grouping extinct marine echinoderms with reduced or sessile body forms, found in Paleozoic fossil records.
From Greek 'edrios' (sitting, sessile) and 'asteroid' (star), with the Latin plural ending '-ea.' Taxonomic names use Latin/Greek to group organisms by evolutionary relationships.
Scientists organize extinct creatures into groups with complicated scientific names, and 'Edrioasteroidea' tells you these animals were 'sitting starfish-like things'—the name basically describes what they looked like.
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