Missouri Fish and Wildlife Information System

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Taxonomy

Common Name: OUACHITA KIDNEYSHELL

Phylum: MOLLUSCA

Class: BIVALVIA

Order: UNIONOIDA

Family: UNIONIDAE

Genus: PTYCHOBRANCHUS

Species: OCCIDENTALIS

Taxonomic Authority: (CONRAD)

Taxonomy References: 011 , 006 , 004

Status

STATE RANK S3
GLOBAL RANK G3G4

Status References: 001

Habitat Summary

"Occurs in shallow riffles of creeks and small to medium-sized rivers with gravel-mud or gravel substrates."

Primary Habitat: "Aquatic - river/stream"

References: 005 , 006 , 003

Distribution

General Occurrence in State:

"Occurs south of the Missouri river *03*."

County Occurance

County Occurence
Known	Likely	Unknown	Not Likely	Historic	Extirpated
BOLLINGER		ADAIR
BUTLER		ANDREW
CARTER		ATCHISON
CEDAR		AUDRAIN
CHRISTIAN		BARRY
CRAWFORD		BARTON
DOUGLAS		BATES
FRANKLIN		BENTON
GREENE		BOONE
IRON		BUCHANAN
JASPER		CALDWELL
LACLEDE		CALLAWAY
MADISON		CAMDEN
NEWTON		CAPE GIRARDEAU
OREGON		CARROLL
OZARK		CASS
PULASKI		CHARITON
RIPLEY		CLARK
SHANNON		CLAY
ST. FRANCOIS		CLINTON
STONE		COLE
TANEY		COOPER
WAYNE		DADE
		DALLAS
		DAVIESS
		DEKALB
		DENT
		DUNKLIN
		GASCONADE
		GENTRY
		GRUNDY
		HARRISON
		HENRY
		HICKORY
		HOLT
		HOWARD
		HOWELL
		JACKSON
		JEFFERSON
		JOHNSON
		KNOX
		LAFAYETTE
		LAWRENCE
		LEWIS
		LINCOLN
		LINN
		LIVINGSTON
		MACON
		MARIES
		MARION
		MCDONALD
		MERCER
		MILLER
		MISSISSIPPI
		MONITEAU
		MONROE
		MONTGOMERY
		MORGAN
		NEW MADRID
		NODAWAY
		OSAGE
		PEMISCOT
		PERRY
		PETTIS
		PHELPS
		PIKE
		PLATTE
		POLK
		PUTNAM
		RALLS
		RANDOLPH
		RAY
		REYNOLDS
		SALINE
		SCHUYLER
		SCOTLAND
		SCOTT
		SHELBY
		ST. CHARLES
		ST. CLAIR
		ST. LOUIS
		STE. GENEVIEVE
		STODDARD
		SULLIVAN
		TEXAS
		VERNON
		WARREN
		WASHINGTON
		WEBSTER
		WORTH
		WRIGHT

References for distribution: 005 , 006 , 008 , 003

Distribution by Watersheds

Castor R. and Castor R. Diversion Channel
St. Francis R. from Headwaters to Wappapello Dam
Gasconade R. from Headwaters to Big Piney R.
Big Piney R.
James R.
White R. below Tablerock Dam and Little North Fork White R.
North Fork White R.
Current R.
Fourche Creek
Spring R.

Comments: ""

Distribution by Ecoregions

Ozark Highlands

Comments: ""

Distribution by Potential Natural Vegetation

Oak-Hickory Forest

Distribution by Natural Divisions of Missouri

Ozark Border: Mississippi River
Ozark: Springfield Plateau
Ozark: Upper Ozark
Ozark: St. Francois Mountains
Ozark: White River
Ozark: Lower Ozark

Habitat Associations

Species is associated with "Aquatic" habitats.

National Wetlands Inventory Association:

Riverine

Aquatic Associations:

"Riverine, lower perennial", "Rock bottom, boulder"
"Riverine, lower perennial", "Unconsolidated bottom, cobble/gravel"
"Riverine, lower perennial", "Unconsolidated bottom, sand"
"Riverine, lower perennial", "Unconsolidated bottom, mud"
"Riverine, upper perennial", "Rock bottom, boulder"
"Riverine, upper perennial", "Unconsolidated bottom, cobble/gravel"
"Riverine, upper perennial", "Unconsolidated bottom, sand"
"Riverine, upper perennial", "Unconsolidated bottom, mud"

References for Aquatic Associations: 005 , 006 , 003

Habitat Types:

Permanent Stream

References for Habitat Types: 005 , 006 , 003

Terrestrial Natural Communities:

References for Terrestrial Natural Communities:

Food Habits

Trophic Level:

"Omnivore"

Larval Food Habits

Comments for larval food habits:
""

References for larval food habits:

Juvenile Food Habits

Comments for Juvenile Food Habits:
""

References Juvenile Food Habits

Adult Food Habits

Algae; Not Specified
Protozoans; Not Specified
Other Microorganisms; Not Specified
Bacillariophyceae (diatoms); Not Specified

Comments for Adult Food Habits:
""

References Adult Food Habits 007

Niche Requirements

Egg Niche Requirements

References for egg niches requirements:

Feeding Larvae Niche Requirements

Host specified in comments(00680)

References for feeding larvae niche requirements: 003

Resting Larvae Niche Requirements

Substrate (not bottom type): mud or silt
Substrate (not bottom type): sand substrate
Substrate (not bottom type): rock substrate
Substrate specified in comments(00080)
Relation to substrate: occurs in substrate (penetrating)
Relation to substrate specified in comments(00090)
Bottom type: mud or silt
Bottom type: sand
Bottom type: gravel
Bottom type: rubble
Bottom type: boulders
Current velocity: slow current
Current velocity: moderate current
Current velocity specified in comments(00150)
Water depth: shallow
Water depth specified in comments(00230)
Stream width specified in comments(00265)
Natural features: riffles

References for resting Larvae niche requirements: 003

Feeding Juvenile Niche Requirements

References for feeding juvenile niche requirements:

Resting Juvenile Niche Requirements

References for resting juvenile niche requirements:

Breeding Adult Niche Requirements

Substrate (not bottom type): mud or silt
Substrate (not bottom type): sand substrate
Substrate (not bottom type): rock substrate
Substrate specified in comments(00080)
Relation to substrate: occurs in substrate (penetrating)
Relation to substrate specified in comments(00090)
Bottom type: mud or silt
Bottom type: sand
Bottom type: gravel
Bottom type: rubble
Bottom type: boulders
Current velocity: slow current
Current velocity: moderate current
Current velocity specified in comments(00150)
Water depth specified in comments(00230)
Stream width specified in comments(00265)

References for feeding Adult niche requirements: 005 , 003

Feeding Adult Niche Requirements

References for feeding adult niche requirements: 005 , 003

Resting Adult Niche Requirements

References for resting adult niche requirements:

Niche Requirement Summary

Bottom type: boulders
Bottom type: gravel
Bottom type: mud or silt
Bottom type: rubble
Bottom type: sand
Current velocity specified in comments(00150)
Current velocity: moderate current
Current velocity: slow current
Host specified in comments(00680)
Natural features: riffles
Relation to substrate specified in comments(00090)
Relation to substrate: occurs in substrate (penetrating)
Stream width specified in comments(00265)
Substrate (not bottom type): mud or silt
Substrate (not bottom type): rock substrate
Substrate (not bottom type): sand substrate
Substrate specified in comments(00080)
Water depth specified in comments(00230)
Water depth: shallow

Comments about Life History:

Code	Comment

Life History Information

Comments about Life History:

Code	Comment

Management

Beneficial Management Practices:

Beneficial Management References:

Adverse Managment Practices:

Adverse Management References:

Comments on Management:

References for Management Comments:

References

Reference Code	Citation
001	Missouri Natural Heritage Program. 2007. Missouri Species and Communities of Conservation Concern Checklist. Missouri Department Of Conservation. Jefferson City, Missouri. 51 Pp.
002	Natureserve: An Online Encyclopedia Of Life [Web Application]. 2000. Version 1.0. Arlington (Va): Association For Biodiversity Information. Available: Http://Www.Natureserve.Org/. (Accessed: November 7, 2000).
003	Oesch, R.D. 1995. Missouri Naiades. A Guide To The Mussels Of Missouri. Second Edition. Missouri Dept. Of Conservation. Jefferson City, Missouri. 271 Pp.
004	Williams, J.D., A.E. Bogan, R.S. Butler, K.S. Cummings, J.T. Garner, J.L. Harris, N.A. Johnson and G.T. Watters. 2017. A revised list of the freshwater mussels (Mollusca: Bivalvia: Unionida) of the United States and Canada. Freshwater Mollusk Biology and Conservation 20:33-58.
005	Buchanan, A.C. 1979. Mussels (Naides) Of The Little Black River Basin In Missouri And Arkansas. United States Dept. Of Agriculture, Soil Conservation Service. Columbia, Missouri. 69 Pp.
006	Unpb Missouri Department of Conservation Heritage Database. P.O. Box 180, Jefferson City, Mo 65102.
007	Allen, W.R. 1914. The Food And Feeding Habits Of Freshwater Mussels. Biol. Bull. 27(3):127-139.
008	Unpb Bruenderman, S. Mussel Occurrence Database. Missouri Dept. Of Conservation, 1110 S. College Ave., Columbia, Mo 65201 (573-882-9880).
009	Unpb Sternburg, J. MO Dept. of Conservation, P.O. Box 180, Jefferson City, MO 65102 (573-751-4115)
010	Pflieger, W.L. 1989. Aquatic Community Classification System For Missouri. Mo Dept. Of Conservation. Aquatic Series No. 19. 70 Pp + Supplement.
011	Freshwater Mollusk Conservation Society (FMCS). 2021. The 2021 checklist of freshwater mussels. https://molluskconservation.org/Library/Committees/Names/Appendix_1_Bivalves_Revised_Names_List_20210825.pdf.