The plicate rocksnail is a pleurocerid snail that can grow to about 0.8 in (20 mm) in length. Although this species is morphologically similar to other rocksnail species in the Mobile River Basin, it is genetically distinct, as documented by C. Lydeard and others in 1997. This species is currently found in the Locust Fork of the Black Warrior River.
Location in Taxonomic Tree
Plicate rocksnails inhabit shallow gravel and cobble shoals in flowing waters.
A natural body of running water.
Pleurocerid snails are considered generalist scrapers and generally feed by ingesting periphyton, or attached algae, and biofilm detritus, meaning dead particulate organic material, scraped off the substrate by the snail’s radula. A radula is a horny band with minute teeth that snails use to pull food into the mouth, as documented by J.B.Y. Morales and A.K. Ward in 2000.
Shells are subglobose with broadly rounded apertures or shell openings. The body whorl may be ornamented with strong folds or plicae, as described by C. Goodrich in 1922. The characteristic plicae adjacent to the suture of the body whorl are notably indistinct or absent in juveniles, as described by N.V. Whelan and others in 2014.
Measurements:Length: About 0.8 in (20 mm)
Shell color is usually brown to green with four equidistant color bands, and the aperture is usually bluish-white.
While longevity has not been documented in the wild, specimens have survived for two years in captivity.
Their eggs are usually laid singly, but they have been observed occasionally depositing two eggs in close proximity. Specimens have reproduced for multiple years in captivity at the Alabama Aquatic Biodiversity Center. They reproduce for about two months each year, when water temperatures range from 24 to 29 Degrees Celsius.
The plicate rocksnail historically occurred in the Black Warrior River, the Little Warrior River and the Tombigbee River, as documented by C. Goodrich in 1922. It is currently found in the Locust Fork of the Black Warrior River.
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