Listing
Nov 21, 1991
Nov 21, 1991 Listing
ETWP; Animal Candidate Review for Listing as Endangered or Threatened Species; 56 FR 58804 58836
- Publication type: CNOR
Item 1
FWS Focus
Overview
Characteristics
Overview
The flat pebblesnail is a freshwater snail in the family Hydrobiidae. The flat pebblesnail is found attached to clean, smooth stones in rapid currents of river shoals and is currently found in the Cahaba River drainage. This species has not been found in the Coosa River since the construction of Lay and Logan Martin Dams.
Scientific Name
Lepyrium showalteri
Common Name
Flat Pebblesnail
FWS Category
Snails
Identification Numbers
Characteristics
Characteristic category
Physical Characteristics
Characteristics
Size & Shape
Snails in this family are small with adults of many freshwater species reaching a maximum length of 1 to 2 millimeters. The flat pebblesnail is relatively large in comparison, with adults reaching lengths of 3.5 to 4.4 millimeters.
Color & Pattern
The umbilical area is imperforate, or has no opening, and there are 2-3 whorls which rapidly expand.
Characteristic category
Life Cycle
Characteristics
Life Span
Its life span appears to be one year based on observations of captive individuals at the Alabama Aquatic Biodiversity Center.
Reproduction
This species lays its eggs in capsules on hard surfaces underwater.
Life Cycle
Little is known about the life history of this species.
Characteristic category
Habitat
Characteristics
Habitat
The flat pebblesnail is found attached to clean, smooth stones in rapid currents of river shoals.
Characteristic category
Food
Characteristics
Food
Similar species of hydrobiids feed on algae and or detritus.
Geography
Characteristics
Range
This species was historically found in the mainstem Coosa River and in the Cahaba River and its tributary the Little Cahaba River. This species is currently found in the Cahaba River drainage. It has not been found in the Coosa River since the construction of Lay and Logan Martin Dams.
Timeline
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