
(interior)

(exterior)
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Note: Red text
is defined in the Glossary
Description
The Savannah lilliput was described by Conrad in 1838 from the Wateree
River in South Carolina. This species has a small, somewhat inflated,
oval or elliptical shell. A large specimen would be 35 mm in length,
20 mm in height, and 16 mm wide. The Savannah lilliput is sexually
dimorphic with female shells having a broader, more truncated
posterior end. The ventral
margin is curved in males and straight in females. The umbo
is prominent and located in the anterior
third of the shell. The periostracum
has a coarse, satiny texture because of the numerous, closely spaced
growth lines. The periostracum is generally blackish in color but
can be brownish, greenish, or olivish with obscure, very fine green
rays (Johnson 1970). The nacre
is bluish white with a pink to purplish iridescence at the posterior
end. The left valve has two triangular
pseudocardinal teeth and two short,
straight, lateral teeth. The right
valve has one chunky, triangular pseudocardinal and one lateral
tooth.
Distribution
(see map)
The Savannah lilliput is a southern Atlantic Slope species that
occurs from the Altamaha River Basin in Georgia north to the Neuse
River Basin in North Carolina (Johnson 1970). This species is presently
considered extirpated from the Neuse and Waccamaw river basins.
Distribution by County: Pee Dee River Basin: Union Co. (Crooked
and Richardson creek subbasins); Montgomery Co. (Densons Creek Subbasin);
Randolph Co. (Little River Subbasin). Cape Fear River Basin: Orange
Co. (University Lake) NOTE: All headwater areas that flow into
these occupied habitats should receive special management.
Habitat Preferences
This species may be found in creeks, rivers, and impounded
habitats. It is typically found in sand, silty-sand or mud substrate
and appears to prefer near shore, still, shallow water, less than
6 inches in depth.
Life History
Little is known about the life history of the Savannah lilliput
at this time.
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