|Necturus maculosus maculosus|
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Necturus is a genus of aquatic salamander only found in the eastern United States and Canada. They are commonly known as Waterdogs and Mudpuppies. The Common Mudpuppy (Necturus maculosus) is likely the most well known species in this group. The last species described was in 1937.
- Common Mudpuppy (Necturus maculosus) (Rafinesque, 1818) 
- Red River Mudpuppy (Necturus louisianensis) Viosca, 1938
- Alabama (Black Warrior) Waterdog (Necturus alabamensis) Viosca, 1937
- Gulf Coast Waterdog (Necturus beyeri) Viosca, 1937
- Neuse River Waterdog (Necturus lewisi) Brimley, 1924
- Dwarf Waterdog (Necturus punctatus) (Gibbes, 1850)
The genus Necturus is under scrutiny by herpetologists. The relationship between the species is still being studied, and more changes are sure to come. Most recently, the Red River Mudpuppy (N. louisianensis) was elevated to full species status, after being considered only a subspecies of the Common Mudpuppy (N. maculosus). However, not all herpetologists agree on this change.
- As an amphibian with gill slits it is often dissected in comparative anatomy classes.
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