Western redback salamander

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Western redback salamander
Plethodon vehiculum.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Urodela
Family: Plethodontidae
Subfamily: Plethodontinae
Genus: Plethodon
Species:
P. vehiculum
Binomial name
Plethodon vehiculum
(Cooper, 1860)

The western red-backed salamander (Plethodon vehiculum) is a species of salamander in the family Plethodontidae. The species is found in extreme southwestern Canada and the northwestern United States. The western red-backed salamander is found in temperate rainforests of the Pacific Northwest. It is considered widespread in the region and is not strictly associated with a specific habitat type.

In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined.

Salamander order of amphibians

Salamanders are a group of amphibians typically characterized by a lizard-like appearance, with slender bodies, blunt snouts, short limbs projecting at right angles to the body, and the presence of a tail in both larvae and adults. All present-day salamander families are grouped together under the order Urodela. Salamander diversity is most abundant in the Northern Hemisphere and most species are found in the Holarctic ecozone, with some species present in the Neotropical zone.

Family is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy; it is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as being the "walnut family".

Contents

Description

The western red-backed salamander has a slender build with relatively short limbs. Adults average 1.5 to 2 in (3.8 to 5.1 cm) in snout-to-vent length (SVL), and 3 to 4.5 in (7.6 to 11.4 cm) in total length (including tail). The western red-backed salamander has a colored stripe on its back, which extends from the anterior of the head to the end of the tail. The coloration of the stripe is highly variable, ranging from the typical reddish orange to bright yellow, with melanism also being documented in the species.

Melanism animal phenotype

The term melanism refers to black pigment and is derived from the Greek: μελανός. Melanism is the increased development of the dark-colored pigment melanin in the skin or hair.

Distribution and habitat

The western red-backed salamander is found from southwestern Oregon to southwestern British Columbia. Within that geographic range, the salamander is found from the western slopes of the Cascade Mountains to the Pacific Coast. The western red-backed salamander has been found on Vancouver Island. A variety of habitats are inhabited by the salamander, including temperate forests, rocky talus slopes, and riparian areas.

Oregon state of the United States of America

Oregon is a state in the Pacific Northwest region on the West Coast of the United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho. The parallel 42° north delineates the southern boundary with California and Nevada.

British Columbia Province of Canada

British Columbia is the westernmost province of Canada, located between the Pacific Ocean and the Rocky Mountains. With an estimated population of 5.071 million as of 2019, it is Canada's third-most populous province.

Vancouver Island Island on the western coast of Canada

Vancouver Island is in the northeastern Pacific Ocean. It is part of the Canadian province of British Columbia. The island is 460 kilometres (290 mi) in length, 100 kilometres (62 mi) in width at its widest point, and 32,134 km2 (12,407 sq mi) in area. It is the largest island on the West Coast of the Americas.

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References


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