Ultrastructure of thyroid follicle cells of three salamanders (Ambystoma, Amphiuma, and Necturus) exhibiting varying degrees of neoteny.
D000818:Animals; D008675:Metamorphosis, Biological; D008853:Microscopy; D008854:Microscopy, Electron; D013961:Thyroid Gland / Q000166:cytology* / Q000502:physiology; D014562:Caudata / Q000033:anatomy & histology* / Q000502:physiology