Metamerism in Annelids Metamerism is a key structural feature observed in annelids, where the body is divided into a series of repeating segments called metameres or somites. This segmented organization is a hallmark of the phylum Annelida, which includes earthworms, leeches, and polychaetes. Each segment typically contains a repetition of organs and structures such as muscles, nerves, blood vessels, and excretory units, though some functional specialization can occur. What is metamerism ? Understanding metamerism , why it happens, and how to prevent it can save time, money, and product rejects for manufacturers. Learn more! METAMERISM Definition: Metameric segmentation or metamerism is an architectural body plan in some animals in which the similar body segments called metameres or somites are serially repeated one after another. The animals which exhibit such features called metamerically segmented. Metamerism is defined as the phenomenon where the color difference between a dyed material and a standard changes when viewed side by side under different light sources. This effect can lead to discrepancies in color matching unless the materials share the same fiber composition and dye proportions. AI generated definition based on: Textiles and Fashion, 2015
