Salamanders of Tennessee

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Salamanders of Tennessee WFS 433/533 1/16/2013 Caudata Diverse amphibian order; nearly 659 species (9.1% of all amphibians) Nine extant families worldwide - Proteidae - Cryptobranchidae - Plethodontidae - Ambystomatidae - Amphiumidae - Sirenidae - Salamandridae - Hynobiidae - Rhyacotritonidae Total of ~58 species in Tennessee Diverse array of habitats (high mountains and floodplains) Family Plethodontidae Largest family of salamanders (27 genera; >375 species worldwide); ~46 species in TN Nasolabial grooves Lack lungs Some species neotenic Larval stage or direct development Occupy a variety of habitats; diversity greatest in Blue Ridge Mtns. TN has the following genera: Desmognathus, Plethodon, Eurycea, Hemidactylium, Aneides, Pseudotriton, and Gyrinophilus 1

Genus Desmognathus 16 species in Tennessee Some almost entirely aquatic, others fully terrestrial Two species w/ direct development Hind limbs larger than fore limbs Line line running from eye to posterior margin of jaw Some species can only be distinguished based on geography and genetics Larvae very difficult to identify Spotted Dusky Salamander (Desmognathus conanti) Generally low elevation (< 1000 ft elev.) Wavy line on dorsum Slight keel on tail Muddy appearance to venter Photos by: M. Niemiller Santeetlah Dusky Salamander (Desmognathus santeetlah) Flecking on body Yellowish tinge on venter Slight keel Higher elevations (> 2500 ft. elev.) 2

Seal Salamander (Desmognathus monticola) Worm-like markings on dorsum Pale belly with no markings Keel evident on tail Up to ~3500 ft. elev. Cornified toe-tips Photo by: M. Niemiller Black-bellied Salamander (Desmognathus quadramaculatus) Brown-rufous dorsal coloration Charcoal black belly Sharp keel on tail 1000 ft to highest elevations Photos by: M. Niemiller Shovel-nosed Salamander (Desmognathus marmoratus) Very similar to the Blackbelly Salamander Sharper keel on tail and shorter snout Nares are closed Photos by: M. Niemiller 3

Pygmy Salamander (Desmognathus wrighti) Look for chevron markings on dorsum Relatively small size No keel on the tail Highly terrestrial 2,400 ft and up in elevation Photo by: M. Niemiller Ocoee Salamander (Desmognathus ocoee) and R. Hardman Distinct wavy line on dorsum Rounded tail Highly variable dorsal coloration Higher elevations Imitator Salamander (Desmognathus imitator) Photos by: M. Niemiller May have red cheeks Slightly keeled tail Wavy line on dorsum Can be difficult to distinguish from D. ocoee Higher elevations 4

Genus Plethodon 17 species in Tennessee Fully terrestrial Direct development Very high densities in some areas Some species can only be distinguished based on geography and genetics Southern Red-backed Salamander (Plethodon serratus) Bright red dorsum Serrated edges along dorsal stripe Photos by: M. Niemiller Southern Zig-zag Salamander (Plethodon ventralis) Photos by: Bill Sutton Distinct wavy line on dorsum Chestnut-reddish stripe down dorsum Orange-red shoulder patch Confusion on exact species in TN Lower elevation woodland habitats 5

Jordan s Salamander (Plethodon jordani) Photo by: R. Hardman Endemic to the Great Smoky Mtns. Found at elevations >2,800 ft. Bluish-gray dorsum coloration Photo by: R. Hardman Slimy Salamander Plethodon glutinosus White spotting on dorsum and lateral surface Glue-like substance excreted when handled Genus Eurycea 7 species in Tennessee Most species brightly colored: yellow, red, orange Both hind and fore limbs approximately equal size Males with conspicuous mental glands and cirri during breeding season Larvae can be difficult to identify Known as brook salamanders 6

Blue Ridge Two-lined Salamander (Eurycea wilderae) Photo by: R. Hardman Yellow to orange dorsal coloration Two single black lines on the dorsum Present at most elevations above 1000 ft Photo by: M. Niemiller Cave Salamander (Eurycea lucifuga) Primarily twilight zone of caves Spotted pattern on dorsum Long-tailed Salamander (Eurycea longicauda) Tail comprises >60 percent of body Chevron markings on lateral surface of tail Found in seeps or other low-flow envs. 7

Four-toed Salamander (Hemidactylium scutatum) Photo by: M. Niemiller Monotypic genus Brownish dorsum Square blunt snout Constriction at base of tail Pepperish belly Found in sphagnum bogs Red Salamander (Pseudotriton ruber) Three species of Pseudotriton worldwide Robust cigar-shaped body Striking red body coloration Black flecks on the dorsal and lateral surfaces Golden iris Low order streams and seeps up to 1500 m in elevation Green Salamander (Aneides aeneus) 7 species of Aneides worldwide; 1 in TN Green and black lichen dorsal coloration Laterally compressed body structure Squarish toe tips with sticky toe pads Commonly inhabits rock outcrops and bluffs and R. Hardman 8

Spring Salamander (Gyrinophilus porphyriticus) Four species of Gyrinophilus; three in TN Bright orange to salmon body coloration Large squarish snout with pronounced canthus rostralis Large and fleshy keeled tail Commonly found associated with stream, seep, and cave environments and M. Niemiller Eastern Hellbender (Cryptobranchus alleganiensis) Cryptobranchidae: two genera (3 species worldwide); 1 species in TN Broad, flat head No external gills Keratinized toe tips Broad, flat paddle shaped tail Extra skin flaps on lateral surface Mudpuppy (Necturus maculosus) Proteidae: two genera (~7 species worldwide); 1 species in TN Photo by: M. Niemiller Broad, flat head External gills (reddish tinge) Spotted pattern on dorsum Four toes on hindlimbs Broad, flat paddle shaped tail Max. total length ~400 mm 9

Three-toed Amphiuma (Amphiuma tridactylum) Amphiumidae: one genera (3 species worldwide); 1 species in TN Eel-like appearance Rudimentary front and hindlimbs present Three small toe-like structures on limbs Floodplains and other mucky, low-oxygen environments Lesser Siren (Siren intermedia) Sirenidae: two genera (4 species worldwide); 1 species in TN Eel-like appearance Only forelimbs present; no hindlimbs Also found in mucky, low-oxygen environments Family Ambystomatidae One genus; 31 total species (six species in TN). Fully new-world distribution Large, robust adults Costal grooves Adults possess lungs Most reproduce in ephemeral ponds; some in streams Some species neotenic Larval stage 10

Tiger Salamander (Ambystoma tigrinum) Photo by: L. Marshall Large, robust salamander with olive dorsal coloration Large paddle-shaped tail Broad distribution Mole Salamander (Ambystoma talpoideum) Relatively large head Stocky and plump body Flecking on lateral surface Photos by: M. Niemiller Spotted Salamander (Ambystoma maculatum) Large conspicuous yellow or orange spots Dark gray dorsal coloration Moves to breeding ponds in mass migrations 11

Marbled Salamander (Ambystoma opacum) White and black marbled dorsal coloration Breeds in fall months Nests communally Smallmouth Salamander (Ambystoma texanum) Head small relative to body Brown or grayish body coloration Fleshy keeled tail Lichen-like markings on lateral surface Red-Spotted Newt (Notophthalmus viridescens) Salamandridae: 15-20 genera (70 species worldwide); 1 species in TN Bright orange skin Cranial crests above eyes Complex three stage life history Rough glandular skin Toxic skin secretions 12