Pleurobema decisum

Southern Clubshell

FWS Focus

Overview

Characteristics
Overview

The southern clubshell is a medium-sized mussel found only in the Mobile River Basin of Alabama, Georgia, Mississippi and Tennessee.

Scientific Name

Pleurobema decisum
Common Name
southern clubshell
FWS Category
Clams
Kingdom

Location in Taxonomic Tree

Identification Numbers

TSN:

Characteristics

Characteristic category

Habitat

Characteristics
Habitat

The southern clubshell lives burrowed in gravel and sand at the bottom of large creeks and rivers where it filters food from the water column.

River or Stream

A natural body of running water.

Characteristic category

Physical Characteristics

Characteristics
Color & Pattern
Size & Shape

The southern clubshell is a medium-sized mussel, with a roughly rectangular, yellow to yellowish brown shell.

Characteristic category

Life Cycle

Characteristics
Life Cycle

Females release packages, called conglutinates, of parasitic larvae or glochidia in late spring or early summer. The larva will attach and grow if they come into contact with certain minnow species (Cyprinella venusta, C. callistia or C. trichroistia). After a period of time on their host fish, juvenile southern clubshell will begin to drop off their host fish to begin a sedentary life on the stream bottom. 

Geography

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