Testudines    Kinosternon subrubrum -- Eastern Mud Turtle

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Gallatin County, IL; photo by Scott Ballarddistribution map

Purple shade indicates vouchered specimens. Light blue (cyan) shade indicates photographic records. Yellow shade indicates verified sighting.
Slanted hatch indicates pre-1980 records only

NOTE: Not all specimens upon which these maps are based have been verified.

 

Key Characters: Long, slender toes; broad snout; no nasolabial grooves; wide head; belly paler than sides and back; cloacal opening surrounded by gray.

Similar Species: Blue-spotted salamander, silvery salamander, slimy salamander, smallmouth salamander.

Description: A long (up to 17 cm TL), brown or dark gray salamander with spindly limbs. Head distinctly wider than those of blue-spotted and smallmouth salamanders, snout relatively longer and broader, and legs and toes longer. Adpressed limbs overlap by 2-4 costal folds. Costal grooves 12-13. Cloacal walls of breeding male greatly swollen with glands that produce spermatophores. Larva has a large head, unpigmented throat, long, slender toes, and intensively pigmented tail fin.

Habitat: Upland deciduous forest, especially beech-maple forests of extreme eastern Illinois.

Natural History: Subterranean adults are seldom seen outside of the breeding season, but may occasionally be found in leaf litter or under logs. Diet includes beetles, centipedes, slugs, worms, and other invertebrates. During February-March rains, adults migrate several hundred meters to congregate and breed in scattered vernal woodland ponds or fish-free permanent ponds. The 180-210 eggs (2-2.5 mm diameter) enclosed within jelly-like masses (usually 14-22 eggs per mass) are attached to twigs and stems in water. Eggs hatch in less than a month and larvae remain in pond 2-3 months where they prey on invertebrates and other amphibian larvae. Predators of adults include skunks, raccoons, and snakes.

Status: Threatened in Illinois. First found in Illinois in 1990, known to occur at only a few localities in the Wabash Border Division (see distribution map, above).

 

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Last updated Monday, 26-Apr-2004 13:58:29 CDT