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Maryland Checklist - Order: Unionoida - all-time (Total: 20)
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Adventive
\n
Coastal Plain only
\n
Endangered (Federal)
\n
Endangered (MD)
\n
Excluded
\n
Exotic
\n
Extinct
\n
Extirpated
\n
Extralimital
\n
G1 (Highly globally rare)
\n
G1G2 (Highly globally rare)
\n
G2 (Globally rare)
\n
G2G3 (Globally rare)
\n
G3 (Globally rare/local)
\n
G3G4 (Globally vulnerable)
\n
G4
\n
G4G5
\n
G5
\n
Garrett only
\n
GH (No known extant occurrences)
\n
GU (Global status uncertain)
\n
Hybrid
\n
In need of conservation
\n
Invasive
\n
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\n
Non-native
\n
Reviewable (MD/DCRC)
\n
S1 (Highly state rare)
\n
S1B (Highly state rare breeder)
\n
S1M (State rare migrant)
\n
S1N (State rare non-breeder)
\n
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)
\n
S2S3B (State rare breeder)
\n
S3 (Watch list)
\n
S3B (State watchlist breeder)
\n
S3S4
\n
S3S4B (State watchlist breeder)
\n
S4SE
\n
SH (Historical)
\n
SHB (State historical breeder)
\n
SR (State rare)
\n
Status Uncertain
\n
SUB (Status uncertain breeder)
\n
SXB (State extirpated breeder)
\n
SXM (State extirpated migrant)
\n
Threatened (Federal)
\n
Threatened (MD)
\n
Undescribed
\n
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\n
Waif
\n
Western MD only
\n
Worcester only
\n
Photos
Common Name
Genus
Species
Records
Category
Family
Order
Class
Kingdom
1
Triangle Floater
Alasmidonta
undulata
30
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
2
Eastern Pondmussel
Sagittunio
nasutus
5
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
3
Alewife Floater
Utterbackiana
implicata
3
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
4
Creeper
Strophitus
undulatus
16
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
5
No Common Name
Lampsilis
sp.
1
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
6
Eastern Elliptio
Elliptio
complanata
38
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
7
Atlantic Spike
Elliptio
producta
24
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
8
Yellow Lampmussel
Lampsilis
cariosa
12
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
9
Green Floater
Lasmigona
subviridis
19
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
10
Susquehanna Elktoe
Alasmidonta
marginata
0
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
11
Brook Floater
Alasmidonta
varicosa
35
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
12
Eastern Floater
Pyganodon
cataracta
18
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
13
Paper Pondshell
Utterbackia
imbecillis
3
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
14
Carolina Lance
Elliptio
angustata
0
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
15
Yellow Lance
Elliptio
lanceolata
5
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
16
Northern Lance
Elliptio
fisheriana
5
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
17
Plain Pocketbook
Lampsilis
cardium
5
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
18
Eastern Lampmussel
Lampsilis
radiata
24
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
19
Tidewater Mucket
Atlanticoncha
ochracea
17
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
20
Dwarf Wedgemussel
Alasmidonta
heterodon
17
Freshwater Bivalves
Unionidae
Unionoida
Bivalvia
Animalia
