tagmosis


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tagmosis

[tag′mō·səs]
(invertebrate zoology)
The formation of groups of metameres into body regions with functional differences.
References in periodicals archive ?
The Malacostraca constitutes a monophyletic taxon well defined by several apomorphic characters such as a characteristic tagmosis, the position of the gonopores, the subdivision of the stomach into specific functional units, and a ring of 19 embryonic ectoteloblasts (for review and discussion of different views see Dahl, 1992; Wagele, 1992).
Cisne (1974) took this approach in his landmark study of changes in tagmosis (complexity) in aquatic arthropods.
These observations are analogous to the tagmosis values defined and calculated by Cisne (1974) as a measure of limb specialization, in his study of arthropod diversification.