Northern slimy salamander


The northern slimy salamander is a species of terrestrial plethodontid salamander found throughout much of the eastern two-thirds of the United States.

Geographic range

P. glutinosus is found from New York, west to Illinois, south to Mississippi, and east to Alabama, with isolated populations in southern New Hampshire and northwestern Connecticut.

Common names

The northern slimy salamander is called "slimy" because it is slimy. It is also sometimes referred to as the viscid salamander, grey-spotted salamander, slippery salamander, or sticky salamander, depending on which source is consulted.

Taxonomy

P. glutinosus is one of 57 species in the genus Plethodon and one of the first of its cogeners to be described. Due to its large geographic range, some taxonomic researchers have suggested splitting P. glutinosus into several distinct species, but this is not widely accepted.

Description

The northern slimy salamander is typically an overall black in color, with numerous silvery spots or gold spots across its back. It is usually in total length, but can grow to 20.6 cm. Males are not easily distinguished from females, though females tend to be slightly larger. It has 15-17 costal grooves.

Behavior

All plethodontid salamanders are territorial, and fight aggressively for territory. Their preferred habitat is in moist soil or leaf litter beneath stones, rotting logs, or other debris near a permanent water source. They sometimes make use of other animals' burrows. Their diet consists primarily of ants, beetles, sow bugs, and earthworms, but they will consume most kinds of insect.

Reproduction

Breeding of P. glutinosus takes place in the spring, and courtship consists of the males performing a sort of dance to attract the females' attention. Females lay clutches of four to 12 eggs in a moist area, which she guards, often neglecting food for the period until they hatch. Hatchlings emerge from the eggs in about three months, having no aquatic stage, like many other salamander species. They instead develop directly into their entirely terrestrial adult form. Maturity is not reached for two to three years.