| Spotted dusky salamander | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Urodela |
| Family: | Plethodontidae |
| Subfamily: | Plethodontinae |
| Genus: | Desmognathus |
| Species: | D. conanti |
| Binomial name | |
| Desmognathus conanti Rossman, 1958 | |
| Synonyms | |
Desmognathus fuscus conanti | |
The spotted dusky salamander (Desmognathus conanti) is a species of salamander in the family Plethodontidae. It is endemic to the United States. [2] [3] [1]
Desmognathus conanti was described in 1958 by Douglas A. Rossman, but was later reclassified as a subspecies of the northern dusky salamander (D. fuscus). [4] However, numerous genetic and morphological studies since then have affirmed it as being a distinct species and it was elevated to full specific status in 1996. [5] [2] [6] In addition, genetic studies indicate that D. conanti is paraphyletic with respect to the Santeetlah dusky salamander (D. santeelah), which lies nested within it; thus, D. conanti itself likely represents a species complex of multiple undescribed cryptic species. [7]
Desmognathus conanti has a wide range in the southeastern and south-central United States, ranging from southern Illinois south to the panhandle of Florida, and west to Louisiana and southern Arkansas. [2] They are semiaquatic, typically inhabit cool, forested seeps or streams/streamsides. [8]
Desmognathus conanti is a medium sized salamander, between 35-40 mm in body length at sexual maturity and is moderately stout with a moderately keeled tail. [9] It is described as having a bright color pattern and colored stripe behind its eyes. It has several pairs of golden spots on the dorsum, which are larval spots often retained as adults that may sometimes fuse to form a light dorsal stripe in adults. [10] The belly is light with dark flecks. It closely resembles D. fuscus and D. santeetlah, and is thus best distinguished from them by range. [4] [11] [12]
Females typically move or turn away as males approach and the males must follow slowly after the female. The male will perform a variety of movements including a jerking movement with its head, a “butterfly” movement with its forelimbs(where it swings them in circular motions simultaneously) a nudge of the female with the head, a head rub, or tail undulation. With the male’s tail undulating, it will attempt to slide the stationary female onto it and essentially drag her forward and deposit his spermatophore in order for her to receive it through her cloaca. [13]
Salamanders are a group of amphibians typically characterized by their 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 ten extant salamander families are grouped together under the order Urodela from the group Caudata. Salamander diversity is highest in eastern North America, especially in the Appalachian Mountains; most species are found in the Holarctic realm, with some species present in the Neotropical realm.
The palmate newt is a species of newt found in Western Europe, from Great Britain to the northern Iberian peninsula. It is 5–9.5 cm (2.0–3.7 in) long and olive or brown with some dark spots. The underside is yellow to orange, and the throat, unlike in the similar smooth newt, always unspotted. A dark stripe runs along the head and through the eyes. Breeding males develop a distinct filament on the end of their tail, strongly webbed hind feet, and a low, smooth crest on their back.
Plethodontidae, or lungless salamanders, are a family of salamanders. With over 500 species, lungless salamanders are by far the largest family of salamanders in terms of their diversity. Most species are native to the Western Hemisphere, from British Columbia to Brazil. Only two extant genera occur in the Eastern Hemisphere: Speleomantes and Karsenia.
Plethodon is a genus of salamanders in the family Plethodontidae. They are commonly known as woodland salamanders. All members of the genus are endemic to North America. They have no aquatic larval stage. In some species, such as the red-backed salamander. Young hatch in the adult form. Members of Plethodon primarily eat small invertebrates. The earliest known fossils of this genus are from the Hemphillian of Tennessee in the United States.
The alpine newt is a species of newt native to continental Europe and introduced to Great Britain and New Zealand. Adults measure 7–12 cm (2.8–4.7 in) and are usually dark grey to blue on the back and sides, with an orange belly and throat. Males are more conspicuously coloured than the drab females, especially during breeding season.
Desmognathus is a genus of lungless salamanders in the family Plethodontidae known as dusky salamanders. They range throughout the eastern United States as far west as Texas, and north to southeastern Canada.
Holbrook's southern dusky salamander, previously known as just the southern dusky salamander, is a species of salamander endemic to the southeastern United States. Older sources often refer to it as the eared triton. Formerly abundant, it has precipitously declined since the 1960s.
The seepage salamander is a small, terrestrial species of salamander in the family Plethodontidae. It is endemic to the United States. They are found in small areas of Tennessee, North Carolina, Georgia, and Alabama. Its natural habitats are temperate forests, intermittent rivers, and freshwater springs. It gets its name from the seepages around which it lives. It is very similar in its appearance and life history to the pygmy salamander. These two species differ greatly from the other Desmognathus species. They are the smallest salamanders in the genus, measuring only 3–5 cm (1–2 in) in length. They are also the only two terrestrial, direct-developing Desmognathus species. However, the two species are not often seen to coexist, differing in distribution by elevation; although there are exceptions. The seepage salamander is currently listed as Near Threatened, with its numbers declining in most of states in which it is found. It is threatened by habitat loss, with logging having a major effect.
The Ouachita dusky salamander is a species of salamander in the family Plethodontidae. It is endemic to the states of Arkansas and Oklahoma in the United States. The specific epithet is in honor of Herbert Hutchinson Brimley and his younger brother, Clement Samuel Brimley, both of whom were zoologists.
Desmognathus fuscus is a species of amphibian in the family Plethodontidae. The species is commonly called the dusky salamander or northern dusky salamander to distinguish it from populations in the southern United States which form several distinct species, the southern dusky salamanders. The northern dusky salamander is the most widespread representative of its genus in Canada. It can be found in eastern North America from extreme eastern Canada in New Brunswick south to South Carolina. The size of the species' total population is unknown, but is assumed to easily exceed 100,000. The species' habitat differs somewhat geographically; dusky salamanders in the northern part of the range prefer rocky woodland streams, seepages, and springs, while those in the south favor floodplains, sloughs, and muddy places along upland streams. They are most common where water is running or trickling. They hide under various objects, such as leaves or rocks, either in or near water. Alternatively, they may enter burrows for protection. The dusky salamander lays its eggs close to water under moss or rocks, in logs, or in stream-bank cavities. The larval stage which follows is normally aquatic.
The ocoee salamander is a species of salamander in the family Plethodontidae. This salamander has a variety of colors and patterns, and got its name from Tennessee state wildflower. Its natural habitats are temperate forests, rivers, intermittent rivers, freshwater springs and wet rocks in mountainous areas of the Southeastern United States. It was first described by Nicholls in 1949. They are territorial and feed on small invertebrates. It is widely distributed in the southeastern United States and is listed as "Least Concern" by the International Union for Conservation of Nature.
The blackbelly salamander is a species of salamander in the family Plethodontidae. It is endemic to the United States. Its natural habitats are rivers, intermittent rivers, and freshwater springs. It is threatened by habitat loss.
The black mountain salamander is a species of salamander in the family Plethodontidae.
The pygmy salamander is a species of salamander in the family Plethodontidae. It is endemic to the United States in the southern Appalachians in North Carolina and Tennessee. Desmognathus wrighti is a member of the family Plethodontidae and is commonly known as the pygmy salamander. As the name suggest the pygmy salamander is the smallest of the nineteen species in the genus Desmognathus. D. wrighti undergoes direct development and does not have a free-living larval stage. Only two other taxa in Desmognathus, D. aeneus and D. organi, exhibit direct development along with the pygmy salamander. In the genus Desmognathus, body size, habitat preferences, and patterns used by males during courtship are quite variable. D. wrighti courtship is noted by the male biting and seizing its partner in order to provide them with a chemical stimulus. The pygmy salamander can be found in the southern Appalachians of the United States in western North Carolina and eastern Tennessee. Geographical distribution of the Desmognathus wrighti is fragmented and the highest abundance of the species can be found at high elevations in spruce and fir tree forest.
The northern pygmy salamander is a terrestrial species of salamander in the family Plethodontidae and genus Desmognathus. Along with the southern pygmy and the seepage salamander, these are some of the smallest salamander species in North America and can be found in higher elevations in the southern Appalachians.
Valentine's southern dusky salamander is a species of salamander in the family Plethodontidae. It is endemic to the southeastern United States.
The flat-headed salamander is a species of salamander in the family Plethodontidae. It is endemic to the United States, where it is known from Virginia and likely North Carolina.
