This glossary contains definitions of scientific terms used in The Scyphozoan. If you cannot find a word you did not understand, please write to the webmaster, including the word and the URL for the page on which it occurs. We will add it to the glossary. Thank you!
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Ephyra, The earliest medusoid stage. pl. ephyrae. See an example.
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Life-history, The development and growth of an individual organism often presented as a series of stages characteristic of a particular species or group of species. Reproduction by mature organisms begins the life-history again, leading to the idea of a life-cycle. See an example.
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Medusoid, having the characteristics of a medusa. See an example. See another example.
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Ontogeny, The development and growth of an individual organism from zygote until death, often conceived as being through progressive stages. See also Life-history
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Strobilation, The process by which a polyp differentiates and asexually produces new medusae. See also ephyra. See an example.
Synapomorphy, A shared derived character; a character that is shared by two or more taxa (e.g. species) and evolved in their common ancestor, thus indicating their common evolutionary descent (and distinguishing them from other taxa that do not have this character state).
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Taxa, plural of taxon.
Taxon, The named taxonomic unit (e.g. Aurelia aurita, Ulmaridae, Semaeostomeae, Scyphozoa) to which individuals or groups of species are assigned. pl. taxa.
Terminal club, The pendulous appendage at the distal end (i.e. end farthest from the bell) of the oral arms in rhizostome medusae such as Mastigias; usually one per oral arm (i.e. eight per medusa). See an example (features f13-f15 in figure).
Trait, A particular feature or character; a distinguishing quality; a characteristic; an attribute.
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