A portion of tissue that gives rise to the scale. At the initial stages the primordium is composed of an accumulation of fibroblast below the basil epidermis. As the primordium develops the epidermis over the fibroblast alters: the basal epidermal cells become cuboidal and narrow, the collagen matrix remodels and the hemidesmosomes disappear. [ GOC:cvs ORCiD:0000-0002-2244-7917 http://zfin.org/ZDB-PUB-081008-12 ]
Synonyms: scale primordia
Term information
Term relations
- scale primordium
- portion of tissue
- neural crest-derived structure
- mesoderm-derived structure
- part of some dermis
- existence starts during or after some larval:days 21-29
- end stage some juvenile:days 45-89