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Adventive
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Coastal Plain only
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Endangered (Federal)
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Endangered (MD)
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Excluded
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Exotic
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Extinct
\n
Extirpated
\n
Extralimital
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G1 (Highly globally rare)
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G1G2 (Highly globally rare)
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G2 (Globally rare)
\n
G2G3 (Globally rare)
\n
G3 (Globally rare/local)
\n
G3G4 (Globally vulnerable)
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G4
\n
G4G5
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G5
\n
Garrett only
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GH (No known extant occurrences)
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GU (Global status uncertain)
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Hybrid
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In need of conservation
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\n
Nativity Uncertain
\n
Non-native
\n
Reviewable (MD/DCRC)
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S1 (Highly state rare)
\n
S1B (Highly state rare breeder)
\n
S1M (State rare migrant)
\n
S1N (State rare non-breeder)
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S1S2 (Highly state rare)
\n
S1S2B (State rare breeder)
\n
S2 (State rare)
\n
S2B (State rare breeder)
\n
S2B (State rare breeder)
\n
S2S3 (State rare)
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S2S3B (State rare breeder)
\n
S3 (Watch list)
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S3B (State watchlist breeder)
\n
S3S4
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S3S4B (State watchlist breeder)
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S4SE
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SH (Historical)
\n
SHB (State historical breeder)
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SR (State rare)
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Status Uncertain
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SUB (Status uncertain breeder)
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SXB (State extirpated breeder)
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SXM (State extirpated migrant)
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Threatened (MD)
\n
Undescribed
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\n
Western MD only
\n
Worcester only
\n
Photos
Common Name
Genus
Species
Records
Category
Family
Order
Class
Kingdom
1
Blood Ark
Lunarca
ovalis
41
Saltwater Bivalves
Arcidae
Arcida
Bivalvia
Animalia
2
Ponderous Ark
Noetia
ponderosa
16
Saltwater Bivalves
Noetiidae
Arcida
Bivalvia
Animalia
3
Transverse Ark
Anadara
transversa
4
Saltwater Bivalves
Arcidae
Arcida
Bivalvia
Animalia
