Regularities of the appearance of morphologically similar structures in the evolution of four-beam corals
Authors:
Abstract
The appearance of new morphological features is confined to a few few few epochs, which in time coincide with the beginning of regressive stages in the history of the Earth's development. In different lines of evolution of quadrangular corals, the main features of skeletal structure appear in a strictly defined sequence, but at different chronological milestones. Among the four-beam corals are distinguished monochronomorphs, confined only to certain time intervals and therefore of great stratigraphic importance, and polychronomorphs - morphologically similar forms of different age.
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