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The shovelnose salamander (Desmognathus marmoratus) is a species of salamander in the family Plethodontidae. It is endemic to the United States.[3]
The golden shovel-nosed salamander (D. aureatus) and black shovel-nosed salamander (D. melanius) were both described in 1956, then synonymized with D. marmoratus, but later revived as distinct species in 2009. However, their distinctiveness was quantified using mtDNA; due to heavy mtDNA introgression between Desmognathus species being a major problem with delineating their taxonomy, both species are not recognized by other taxonomic authorities. However, they are provisionally recognized by Darrel Frost unless proper counter-evidence is released.[4]
The shovelnose salamander is a robust species, broad with a relatively short tail. It receives its name from the shape of its snout which is more square ended than as seen in other salamanders in its genus. The colour is a dusky brown, grey or black with two longitudinal rows of paler small patches and many smaller pale speckles. The underside is usually grey.[5]
The shovelnose salamander is found in the Appalachian Mountains in southeastern United States at 300 to 1,680 metres (980 to 5,510 ft) above sea level. It is (provisionally) thought to range from Virginia south through North Carolina to South Carolina. Populations in Tennessee and Georgia are thought to belong to D. aureatus and D. melanius, although this is still debated.[6] It is found in shallow, flowing water, rapids and riffles on gravel and rocky substrates, but is not found in silted streams.[2][7]
The shovelnose salamander is an aquatic species, living and feeding in moderately fast-flowing streams. Although it shares its range with the blackbelly salamander (Desmognathus quadramaculatus), the two species come into contact little, because the blackbelly mostly lies half out of the water and forages on land. The shovelnose salamander does not have a fixed home range nor exhibit territorial behaviour as does the blackbelly.[7]
Breeding takes place in late spring and early summer. The female attaches eggs singly or in small clumps to the underside of a rock in moving water. The eggs hatch after about eleven weeks and the larvae hide among the gravel particles and feed on aquatic invertebrates. They undergo metamorphosis into adults at two to three years of age and mature at about five.[7]
The shovelnose salamander is listed as being of "Least Concern" by the IUCN Red List of Threatened Species. This is because it is presumed to have a large population and any decline in numbers is slow. It is affected by silting of the streams in which it lives through logging, agriculture and impoundment but occurs in a number of protected areas. Numbers are also reduced by its use by fishermen as bait.[1]
The shovelnose salamander (Desmognathus marmoratus) is a species of salamander in the family Plethodontidae. It is endemic to the United States.
Desmognathus marmoratus Desmognathus generoko animalia da. Anfibioen barruko Plethodontidae familian sailkatuta dago, Caudata ordenan.
Desmognathus marmoratus Desmognathus generoko animalia da. Anfibioen barruko Plethodontidae familian sailkatuta dago, Caudata ordenan.
Desmognathus marmoratus est une espèce d'urodèles de la famille des Plethodontidae[1].
Cette espèce est endémique des États-Unis. Elle se rencontre dans le sud-ouest de la Virginie, dans l'ouest de la Caroline du Nord et dans l'Ouest de la Caroline du Sud[1].
Desmognathus marmoratus est une espèce d'urodèles de la famille des Plethodontidae.
Desmognathus marmoratus é um anfíbio caudado da família Plethodontidae.
Desmognathus marmoratus é um anfíbio caudado da família Plethodontidae.
Desmognathus marmoratus (tên tiếng Anh: Shovelnose Salamander) là một loài kỳ giông thuộc họ Plethodontidae. Đây là loài đặc hữu của Hoa Kỳ.
Môi trường sống tự nhiên của chúng là rừng ôn đới, sông ngòi, sông có nước theo mùa, và suối nước ngọt. Chúng hiện đang bị đe dọa vì mất môi trường sống.
Bài viết Bộ Có đuôi này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Desmognathus marmoratus (tên tiếng Anh: Shovelnose Salamander) là một loài kỳ giông thuộc họ Plethodontidae. Đây là loài đặc hữu của Hoa Kỳ.
Môi trường sống tự nhiên của chúng là rừng ôn đới, sông ngòi, sông có nước theo mùa, và suối nước ngọt. Chúng hiện đang bị đe dọa vì mất môi trường sống.
