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Zoology

WCHS Zoology Chapter 9 Classification of Cnidaria

WordDefinition
Phylum Cnidaria radical or biradial symmerty, diploblastic organization, a gastrovascular cavity, and enidocytes, over 9,000 species
class Hydrozoa Cnidocyt6es present in teh epidermis; gametes produced epidermally and always released to the outside of the body; mesoglea is largely acellular; medusae usually with a velum; many polyps colona=ial; mostly marine with some freshwater species.
Class Scyphozoa Medusa prominent in the life history; polyp small; gametes gastrodermal in origin and released into the gastrovascular cavity; cnidocytes present in the gastrodermis as well as epidermis; medusa lacks a velum; mesoglea with wandering mesenchyme cells of o
Class Cubozoa Medusa prominent in life history; polyp small; gametes gastrodermal in origin; medusa cuboidal in shape with tentacles that hang from each corner of the bell; marine, Chironex
Class Anthozoa Colonial or solitary polyps; medusae absent; cnidocytes present in the gastrodermis; cnidocil absent; gametes gastrodermal in origin; gastrovascular cavbity divided by mesenteries that bear nematocysts;
Created by: dmoudy