Leptoxis taeniata

Painted Rocksnail

FWS Focus

Overview

Characteristics
Overview

The painted rocksnail is a small to medium pleurocerid snail that measures about 19 mm (0.8 in) in length and is subglobose to oval in shape. Adult rocksnails move very little and likely live less than two years. This species is the only known survivor of the 15 rocksnail species that historically occurred in the Coosa River drainage.

Scientific Name

Leptoxis taeniata
Common Name
Painted Rocksnail
FWS Category
Snails
Kingdom

Location in Taxonomic Tree

Identification Numbers

TSN:

Characteristics

Characteristic category

Life Cycle

Characteristics
Reproduction

Adult rocksnails move very little, and females probably glue their eggs to rocks in the same habitat.

Life Span

Longevity in the painted rocksnail is unknown. However, a similar species found in the Tennessee River has a short life span of less than two years.

Characteristic category

Physical Characteristics

Characteristics
Size & Shape

The painted rocksnail is a small to medium pleurocerid snail with a subglobose to oval shaped shell, with an aperture or shell opening that is broadly ovate and rounded anteriorly.

Measurements:
Length: About 0.8 in (19 mm)

Color & Pattern

Coloration varies from yellowish to olive-brown, and usually four dark bands are present on the shell. However, some shells may not have bands or some bands may be broken into squares or oblongs.

Characteristic category

Habitat

Characteristics
Habitat

This species is found attached to cobble, gravel or other hard substrates in the strong currents of shoals and riffles, which are shallow areas in a streambed that cause ripples in the water.

River or Stream
Characteristic category

Food

Characteristics
Food

Pleurocerid snails are considered generalist scrapers and generally feed by ingesting periphyton, or attached algae, and biofilm detritus, which is 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.T. Morales and A.K. Ward in 2000.

Geography

Characteristics
Range

The painted rocksnail had the largest range of any rocksnail in the Mobile River Basin. It was historically found from the Coosa River and its tributaries from the northeastern corner of St. Clair County, Alabama, downstream into the main stem of the Alabama River to Claiborne, Alabama, and in the Cahaba River below the Fall Line. The painted rocksnail is currently known from the lower reaches of three Coosa River tributaries, including Choccolocco Creek, Buxahatchee Creek and Ohatchee Creek.

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