pelmatozoan
pelmatozoan Applied to echinoderms that are attached to the substratum (e.g. primitive Crinoidea). The term is used informally, and in some classifications Pelmatozoa is ranked as a subphylum of the Echinodermata. Compare ELEUTHEROZOAN.
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INFORMAL , in·for·mal / inˈfôrməl/ • adj. having a relaxed, friendly, or unofficial style, manner, or nature: an informal atmosphere | an informal agreement bet… Taxon , tax·on / ˈtaksän/ • n. (pl. tax·a / ˈtaksə/ ) Biol. a taxonomic group of any rank, such as a species, family, or class.
taxon (pl. taxa) Any named ta… Alum , alum (ăl´əm), any one of a series of isomorphous double salts that are hydrated sulfates of a univalent cation (e.g., potassium, sodium, ammonium, ce… Radial Symmetry , Skip to main content
radial symmetry
radial symmetry The arrangement of parts in an organ or organism such that cutting through the centre of the str… Psilophytales , Skip to main content
Psilophytales
Psilophytales (psilophytes) Primitive pteridophytes, which were the earliest vascular plants, from the Silurian an… Connate , connate From the Latin connatus, meaning ‘born together’.
1. Applied to similar organs (e.g. leaves or petals) that are joined together. Compare adna…
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pelmatozoan