| Rock pocketbook | |
|---|---|
 | |
| A live individual of Arcidens confragosus | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Unionida |
| Family: | Unionidae |
| Genus: | Arcidens |
| Species: | A. confragosus |
| Binomial name | |
| Arcidens confragosus (Say, 1829) | |
| Synonyms | |
| |
Arcidens confragosus is a species of freshwater mussels in the family Unionidae, the river mussels. It is commonly known as the rock pocketbook,[1][2] but also has many other common names: bastard, black pocketbook, grandmaw, queen, and rockshell.[1]
Distribution
This species is widespread in central parts of the United States: it occurs in the Mississippi River drainage and in coastal rivers draining to the Gulf of Mexico, from the Colorado River in Texas east to the Mobile River System in Alabama.[1]
Description
The shell is "pyriform" or pear-shaped, heavily sculptured, but fairly thin, up to 15 centimetres (5.9 in) long. The shell is green to dark brown. The nacre is white, iridescent.
References
- Cummings, K. (2011). "Arcidens confragosus". IUCN Red List of Threatened Species. 2011 e.T189137A8690933. doi:10.2305/IUCN.UK.2011-2.RLTS.T189137A8690933.en. Retrieved 29 November 2022.
- NatureServe. "Arcidens confragosus". NatureServe Explorer. Arlington, Virginia. Retrieved 29 November 2022.