Two-toed Amphiuma
Amphiuma means

  • Two-toed Amphiuma
  • Two-toed Amphiuma
  • Two-toed Amphiuma
Two-toed Amphiuma1 Two-toed Amphiuma2 Two-toed Amphiuma3

Common Name:
Two-toed Amphiuma
Scientific Name:
Amphiuma means
Etymology:
Genus:
amphi is Greek and means "on both sides",  pneuma is Greek meaning "breathe". This refers to a misconception  that the salamander can breathe both air and water.
 Species:
means has no decisive meaning. It is thought to refer to the temperament of the animal or perhaps in honor of some unknown person named Mean.
Average Length:
14.5 - 30 in. (36.8 - 76 cm)
Virginia Record Length: 
Record length:
45.8 in. (116.2 cm)

PHYSICAL DESCRIPTION: This is a large, dark, semi-aquatic animal *1102,3640*. It has a long cylindrical, eel-like body with 2 sets of virtually functionless limbs, capable of slow, awkward movement over swampy land *1102,1004,1008,3640, 882,3641* with 2 toes on each foot *1102,2130*. It has a large head with small, lidless eyes *1004,1008,3641*. They have an incomplete metamorphosis, wherein the gills are lost but a pair of gill slits remain *3639,3641,1102*. There are 57-60 costal grooves *3639*. This species utilizes a set of sensory pits similar to lateral line of fish to detect vibrations in the water *1102, 1008*. Sex determination is through the appearance of the vent. The male's is surrounded by a narrow ridge, the inner surface towards the front lined with oblique ridges. The female's vent is a narrow slit. This species is from 3-5 feet long *1102,1008,3640,882,2130,3639,3638*.

REPRODUCTION: There are 42-150 eggs laid. They spawn from May-October *3638, 1008,3641*. The eggs are likely laid in water, but where the water levels recede as the seasons change, thus females guarding eggs are often found on land. *11305* The females construct a shallow depression, in which to lay the eggs, and this depression is usually in or around logs and/or tree roots. *11305,1102,1008* The eggs resemble a beaded string *1102,3638,3641*. The female coils around and guards the eggs until they hatch *11305,1102,3638,1008,3641*. Incubation lasts 30-70 days *3638*, and the larvae are about 2 inches long at hatching, with short white gills *1102,1008,3641*. The larvae transform at about 3 inches *1102,09,3641*. Internal fertilization and cloacal contact is utilized *1008*.

BEHAVIOR: This species is sensitive to ultra-violet light *1102*. It is nocturnal, and retreats to the lair in bottom mud or debris during the day *1102,3639,882,3641*. They hibernate through the winter *1008*.

ORIGIN: This species is native *1102,3637,3639*. Population parameters: This species is lives up to 27 years in captivity *1102,3638*. It hybridizes with A. tridactylum *2130*.

References for Life History

Photos:

*Click on a thumbnail for a larger version.

  Jamestowne Island Note - the pores of the lateral line system

 

Verified County/City Occurrence

Charles City County
Chesapeake City
Greensville County
Hampton City
Hanover County
Isle of Wight County
King and Queen County
King William County
Newport News City
Petersburg City
Portsmouth City
Prince George County
Suffolk City
Surry County
Sussex County
Virginia Beach City
York County
Verified in 17 Counties/Cities.


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