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Morphogenesis of body segments and appendages during the larval stages of a common spiroboloid milliped
Author(s) -
Berns Michael W.
Publication year - 1969
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051270305
Subject(s) - biology , morphogenesis , appendage , anatomy , instar , mitosis , meristem , dorsum , larva , imaginal disc , process (computing) , microbiology and biotechnology , botany , genetics , drosophila melanogaster , shoot , gene , computer science , operating system
Three‐dimensional, histological, and x‐ray techniques provide a picture of body segment and limb morphogenesis. Cell multiplication begins in the proliferation region (“meristem”) during the molt from the preceding instar. By four days post‐molt, the cells that will form the new segments are well under way in their anterior, lateral, and dorsal migration. It is suggested that after the anlagen for all the new segments are estabilshed, a mitotic wave commences in the most anterior anlagen and moves posteriorly during the remainder of the instar. When cell proliferation is complete, final differentiation of the segments takes place. The process of limb formation is one of cell proliferation and perhaps migration. Each limb develops in a membranous pocket during the instar following the one in which its respective body segment was formed.