1) Amphibian genus 2) Family proteidae 3) Mud puppies 
The family Proteidae is a group of aquatic salamanders found today in the Balkan Peninsula and North America. The range of the genus Necturus runs from southern central Canada, through the midwestern United States, east to North Carolina and south to Georgia and Mississippi. The range of the olm, the only extant member of the genus Proteus, is lim...
The proteidae family of permanently larval aquatic salamanders. It consists of two living genera - necturus (mudpuppy) of the eastern united states and proteus (the european olm). ... (12 Dec 1998) ... 
[n] - mud puppies
family Proteidae noun mud puppies