parazoan
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parazoan — [par΄ə zō′ən] n. [< ModL Parazoa: see PARA 1 & ZOA] any of the subkingdom (Parazoa) of animals, consisting only of the phylum of sponges, having two tissue layers only and lacking a nervous system and true digestive cavity adj. of the… … English World dictionary
parazoan — noun primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies • Syn: ↑sponge, ↑poriferan • Derivationally related forms: ↑spongy (for: ↑sponge), ↑sponge ( … Useful english dictionary
Taxonomy of commonly fossilised invertebrates — Although the phylogenetic classification of sub vertebrate animals (both extinct and extant) remains a work in progress, the following taxonomy attempts to be useful by combining both traditional (old) and new (21st century) paleozoological… … Wikipedia
metazoan — 1. noun Any animal that undergoes development from an embryo stage with three tissue layers, namely the ectoderm, mesoderm, and endoderm. The term applies to all animals except the sponges. 2. ad … Wiktionary
glass sponge — noun a siliceous sponge (with glassy spicules) of the class Hyalospongiae • Hypernyms: ↑sponge, ↑poriferan, ↑parazoan • Hyponyms: ↑Venus s flower basket • Member Holonyms: ↑Hyalospongiae, ↑ … Useful english dictionary
phylum Porifera — noun coextensive with the subkingdom Parazoa: sponges • Syn: ↑Porifera • Hypernyms: ↑phylum • Member Holonyms: ↑Parazoa, ↑subkingdom Parazoa • Mem … Useful english dictionary
Porifera — noun coextensive with the subkingdom Parazoa: sponges • Syn: ↑phylum Porifera • Hypernyms: ↑phylum • Member Holonyms: ↑Parazoa, ↑subkingdom Parazoa • … Useful english dictionary
poriferan — noun primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies • Syn: ↑sponge, ↑parazoan • Derivationally related forms: ↑spongy (for: ↑sponge), ↑sponge ( … Useful english dictionary
