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122 Terms used in Bionomenclature<br />

monstrosity: a specimen showing an abnormal (non-hereditary) structural<br />

condition; names based on type specimens that were monstrosities<br />

were formerly to be rejected in (bot.), but that provision of the Code<br />

has now been deleted.<br />

more than . . . . less than, [< . . . . . >]: (phyl.) an ideograph placed around<br />

the citation of the name of an author of the original definition of a<br />

homonym that has been conserved for the purpose of emending a<br />

definition.<br />

morph: shape; used of a specimen or stage in a life-cycle with a particular<br />

or unusual, and generally morphological attribute.<br />

morpha, [pl. morphae]: (unoff.) used for specimens or groups of<br />

specimens of an uncertain infraspecific category; cfr taxon.<br />

morphology: the study of a structure; morphological terms are those that<br />

denote structural parts of an organism (e.g. radix = root, caulis =<br />

stem).<br />

morphon: (zool., unoff.) a definitely formed individual.<br />

morphonym: (zool., unoff.) the name of a species; the specific name.<br />

morphotaxon: (palaeo. bot.) a fossil taxon which, for nomenclatural<br />

purposes, comprises only one part, life-history stage, or<br />

preservational state represented by the corresponding nomenclatural<br />

type; any fossil taxon that is described as including more than one<br />

part, life-history stage, or preservational state is not a morphotaxon.<br />

morphotype, [morphotypus]: (1) a group or population of<br />

morphologically differentiated individuals within a species, often<br />

used of ones of no, or of undetermined, taxonomic significance. (2)<br />

(prok.) a variant of a species distinguished by the presence of some<br />

special or unusual morphological feature, for which the term<br />

“morphovar.” is recommended by that Code. (3) (palaeo. zool.,<br />

obsol.) a specimen that has been figured in print not adding to what<br />

was previously known about the morphology of the taxon to which<br />

it is referred. (4) (zool., unoff.) the type specimen of a different<br />

morph of a dimorphic or polymorphic species. (5) (obsol., not<br />

nomenclatural) the generalized or idealized pattern shared by all<br />

members of a taxon; an archetype (q.v.).

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