1) Amphibian genus 2) Genus ambystoma 3) Type genus of the tidae 
(from the article `Caudata`) ...to moderate size, to 35 cm; usually with well-developed lungs; no nasolabial grooves; ypsiloid cartilage present; Oligocene (36.6–23.7 million ...
A genus of the ambystomatidae family. The best known species of this genus are the axolotl forms ambystoma mexicanum and ambystoma tigrinum. They may retain gills and remain aquatic without developing all of the adult characteristics. However, under proper changes in the environment they metamorphose. ... (12 Dec 1998) ... 
[n] - type genus of the Ambystomatidae
genus Ambystoma noun type genus of the Ambystomatidae