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Ortmanniana ligamentina

(Lamarck, 1819)

Mucket

G5Secure Found in 2 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
Least concernIUCN
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.113278
Element CodeIMBIV01020
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomAnimalia
PhylumMollusca
ClassBivalvia
OrderUnionoida
FamilyUnionidae
GenusOrtmanniana
Synonyms
Actinonaias carinata gibbaSimpson, 1900Actinonaias ligamentina(Lamarck, 1819)Unio carinatusBarnes, 1824
Concept Reference
Turgeon, D. D., J. F. Quinn, Jr., A. E. Bogan, E. V. Coan, F. G. Hochberg, W. G. Lyons, P. M. Mikkelsen, R. J. Neves, C. F. E. Roper, G. Rosenberg, B. Roth, A. Scheltema, F. G. Thompson, M. Vecchione, and J. D. Williams. 1998. Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks. 2nd Edition. American Fisheries Society Special Publication 26, Bethesda, Maryland. 526 pp.
Taxonomic Comments
Graf and Cummings (2021) place the two North American species of Actinonaias in the genus Ortmanniana. No subspecies are recognized.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-06-26
Change Date1996-11-25
Edition Date2024-06-26
Edition AuthorsCordeiro, J. (2009); rev. T. Cornelisse (2024)
Threat ImpactMedium
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences> 300
Rank Reasons
Despite some regional threats and localized declines, this species has a large range and number of occurrences, and it has been documented across its range consistently in recent years.
Range Extent Comments
This species occurs in the Mississippi River system in the United States, from Minnesota to New York, south to Alabama and west to Oklahoma, as well as in the St. Lawrence River basin and tributaries of Lakes Erie in Michigan and Ontario , Canada (Burch 1975; Parmalee and Bogan 1998; GBIF 2024; InvertEBase 2024).
Occurrences Comments
This species is known from approximately 641 occurrences using a 2 km separation distance and records from 1993-2024 (GBIF 2024; InvertEBase 2024).
Threat Impact Comments
This species is somewhat threatened by dams and water diversion, invasive zebra mussels, and pollution from agricultural runoff (New York Natural Heritage Program 2020). Historically, this was an important species in the pearl button industry during the late 1800s and first half of the 1900s (Williams et al. 2008).
Ecology & Habitat

Habitat

This species is found in large creeks and rivers in riffles with strong current and in gravel and cobble substrates as well as in large lakes (Williams et al. 2008).
Other Nations (2)
United StatesN5
ProvinceRankNative
TennesseeS4Yes
OklahomaS3Yes
AlabamaS2Yes
MississippiS1Yes
PennsylvaniaS4Yes
KentuckyS4Yes
West VirginiaS3Yes
NebraskaSXYes
ArkansasS5Yes
IllinoisS4Yes
VirginiaS4Yes
KansasS1Yes
WisconsinS4Yes
LouisianaS1Yes
OhioS4Yes
IowaS3Yes
MissouriS4Yes
MinnesotaS2Yes
IndianaS4Yes
MichiganSNRYes
New YorkS2Yes
CanadaN4
ProvinceRankNative
OntarioS4Yes
Threat Assessments
ThreatScopeSeverityTiming
7 - Natural system modificationsRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
7.2 - Dams & water management/useRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)
8.2 - Problematic native species/diseasesLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)
8.2.2 - Named speciesLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)
9 - PollutionLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)
9.3 - Agricultural & forestry effluentsLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)

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Roadless Areas (2)
Pennsylvania (1)
AreaForestAcres
Allegheny FrontAllegheny National Forest7,430
Tennessee (1)
AreaForestAcres
Devil's BackboneCherokee National Forest4,287
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