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Resegmentation in the mexican axolotl, Ambystoma mexicanum
Author(s) -
Piekarski Nadine,
Olsson Lennart
Publication year - 2014
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.20248
Subject(s) - ambystoma mexicanum , axolotl , biology , anatomy , neural crest , amphibian , crest , trunk , process (computing) , embryo , paraxial mesoderm , mesoderm , epidermis (zoology) , spine (molecular biology) , regeneration (biology) , microbiology and biotechnology , paleontology , botany , genetics , embryonic stem cell , physics , quantum mechanics , computer science , gene , operating system
Cover illustration. In amniotes, single vertebrae derive from the sclerotomes of two adjacent somites. However this process of resegmentation is poorly studied in anamniotes. In this issue of the Journal of Morphology, Piekarski and Olsson (pp. 141–152) provide experimental evidence that resegmentation occurs in a species of amphibian. Their results now provide evidence for wider generality of the resegmentation process across vertebrates. The cover image shows a scanning electron micrograph of an axolotl embryo at early tailbud stage. The epidermis has been removed from the left side of the embryo to reveal underlying structures. Cells of the cranial neural crest (marked green) migrate ventrally in distinct streams. The paraxial mesoderm in the dorsal trunk region is segmented into somites, which give rise to vertebrae by resegmentation.