Necturus

Necturus is a genus of aquatic salamanders endemic to the eastern United States and Canada.[1][2][3] They are commonly known as waterdogs and mudpuppies.[1][2] The common mudpuppy (N. maculosus) is probably the best-known species – as an amphibian with gill slits, it is often dissected in comparative anatomy classes.

Necturus
Temporal range: Paleocene–present
Necturus maculosus maculosus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Urodela
Family: Proteidae
Genus: Necturus
Rafinesque, 1819
Species

7 species ( but see text)

Synonyms[1]
  • Exobranchia Rafinesque, 1815 – nomen nudum
  • Phanerobranchus Leuckart, 1821
  • Menobranchus Harlan, 1825
  • Parvurus Dubois and Raffaëlli, 2012

Taxonomy

The genus is under scrutiny by herpetologists.[1] The relationship between the species is still being studied. Most recently, the Red River mudpuppy (N. louisianensis) was elevated to full species status, after being considered only a subspecies of the common mudpuppy (N. maculosus),[1] but not all herpetologists agree on this change.[4]

Species

There are seven species:[1][2]

The AmphibiaWeb lists only five species, not recognizing N. lodingi and N. louisianensis as distinct species.[4]

Two known fossil species, N. krausei and an unnamed species, are respectively known from the Paleocene of Saskatchewan and from Florida during the Pleistocene.[5][6]

Description

Necturus are paedomorphic: adults retain larval-like morphology with external gills, two pairs of gill slits, and no eyelids. They are moderately robust and have two pairs of short but well-developed limbs and a large, laterally compressed tail. Lungs are present but small. Typical adult size is 20–25 cm (8–10 in) in total length, but Necturus punctatus is larger and may reach 40 cm (16 in).[3]

Ecology

Necturus occur in surface waters, preferentially with clear water and rocky substrates without silt. They forage during the night and eat a variety of prey, but have preference for crayfish.[3]

gollark: Why not play...VANILLA to the endgame?
gollark: Why not play...GregTech New Horizons?
gollark: <@148963262535434240> Depends on the rad output of the reactors.
gollark: Like the old AMD bulldozer CPUs and how they were marketed as 8-core but did not actually work that well.
gollark: I mean, not entirely *meaningless*, but given that this mineputer probably runs on architectures weirder than our own it's unlikely to actually be quad-core in the same way.

References
  1. Frost, Darrel R. (2019). "Necturus Rafinesque, 1819". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 9 June 2019.
  2. "North American Herpetofauna: Amphibia: Caudata". Centre for North American Herpetology. Retrieved 9 June 2019.
  3. Vitt, Laurie J. & Caldwell, Janalee P. (2014). Herpetology: An Introductory Biology of Amphibians and Reptiles (4th ed.). Academic Press. pp. 463–465.
  4. "Proteidae". AmphibiaWeb. University of California, Berkeley. 2019. Retrieved 9 June 2019.
  5. "Fossilworks: Necturus krausei". fossilworks.org. Retrieved 2018-12-24.
  6. "PBDB". Necturus Rafinesque (mudpuppy).
  • Media related to Necturus at Wikimedia Commons
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.