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La Néotenie Et Le Problème De La Taille Chez Les Copépodes*)

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The evolution of the Copepoda is characterized by decrease in size. Neotenic regression, contributing also to the diminution in size, has conferred a selective advantage and has consequently exercised an important influence on the constitution and on the morphology of present day Copepoda. The maximum effect of the neotenic regressive factor, reductions in the number of developmental stages and regression in general, have led to the formation of parasitic Copepods, whilst the most minute forms have given rise to the phreatobionts. The end products of the two series of extreme evolution have in common the loss of the habits of the ancestral forms.

Affiliations: 1: Institut de Spéologie, Cluj

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