Southern waterdog, Carolina waterdog.
Menobranchus punctatus Gibbes, 1850, southern Santee River, South Carolina, United States.
This is the smallest species of Necturus, reaching solely about 7 or Eight in (17.8–20.three cm) in whole size. The coloration is slategray to darkish brown or black, with no spots or just a few small, pale spots. The venter is pale and has no spots. Unlike different species of Necturus, the larvae aren’t striped.
This species happens alongside the coastal plain from southern Virginia to central Georgia within the United States. The distribution overlaps that of N. lewisi.
The dwarf waterdog prefers small and medium-size streams, particularly in deeper, slower sections with leaf beds and different particles.
Little is thought in regards to the life historical past and conduct of this species. Adults have been noticed to congregate in leaf beds throughout winter.
FEEDING ECOLOGY AND DIET
Dwarf waterdogs feed on quite a lot of small invertebrates and vertebrates, together with crayfish, worms, arthropods, mollusks, and different amphibians. They might compete for food with N. lewisi the place the 2 inhabit the identical streams.
Little is thought in regards to the reproductive biology of this species, however it’s thought that mating happens in winter, adopted by egg laying someday between March and May.
SIGNIFICANCE TO HUMANS
Dwarf waterdogs are most likely not collected in giant numbers for educational or scientific functions, however they could enter the pet commerce.