FRESHWATER MUSSELS
Current NC conservation protection status
2020 Species Reevaluation (Species Reevaluation and Threat metric score updates in RED)
FEDERAL ESA LISTED E, T (a) or C (d) = PURPLE
North Carolina
North Carolina Known or suspected to concentrate or aggregate (or by its rarity is
RANGE-WIDE
Wildlife Action Plan Species Ranking Results
STATE LISTED E (b) or T (C) or SC (e) = BLUE
RANGE-WIDE
Estimated short- term population trend for the species in North Carolina?
North Carolina
RANGE-WIDE
North Carolina
Management Needs/ Concerns Cumulative Score Threshold =
SGCN Conservation Concern Cumulative Score Threshold =
Estimated % change in area occupied by the species?
Knowledge Gaps
Estimated number of adults within the species’ range
Estimated area of distribution (range size)
Estimated number of adults within North Carolina?
Estimated range size for the species in North Carolina?
concentrated) in North Carolina?
FINAL DRAFT V.1
Conservation Concerns
Cumulative Score Threshold =
Metric 1
Metric 1
Metric 2
Metric 2
Metric 3
Metric 3
Metric 4
Metric 4
Metric 5
Metric 5
Metric 6
Metric 6
Metric 7
Metric 7
Metric 8
Metric 8
Metrics 1 - 8
2015
2015
2015
78
26
22
2020
2020
2020
Common Name
Scientific Name
Family
Population
Letter
SCORE
Letter
SCORE
Letter
SCORE
Letter
SCORE
Letter
SCORE
Letter
SCORE
Letter
SCORE
Letter
SCORE
SCORE
58 54 56 44 45 52 65 46
X X X X X X X X X X X
X X X X X X
116 110 109
22 16 29 28 28 16 40 28 27 18 27 22 25 24 24 33 25 28 31 34 25 26 13 16 28 16 28 18 12 33 30 21 14 23 24 31 16 16 16 18 26 33 29 27 28 30 28 28 28 18 31 25
25 27 21 20 22 27 22 20 23 27 21 25 26 21 20 20 26 20 23 26 26 20 17 21 24 27 20 23 17 20 20 22 28 22 17 19 27 19 19 27 19 25 21 23 25 20 21 20 22 23 20 22
Dwarf Wedgemussel Appalachian Elktoe a freshwater bivalve
Alasmidonta heterodon Alasmidonta raveneliana
Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Cyrenidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae Unionidae
N N N N N N N N
a a
10 10
f - g
4 8 9 1 0 2 6 3 0 0 8 9 0 0 1 2 2 0 6 8 1 1 0 0 7 6 0 0 4 0 8 0 9 7 0 1 9 2 2 0 0 0 1 1 8 1 0
f
4
d - e
7 8 6 5 7 9 7 4 1 6 7 9 4 2 3
d d
8 8 9 8 8 8
a a a b b a a a
10 10 10
c - e
7 2 6 5 2 7
b b
8 8 7 6 7 8 9 7 2
X
e
c e
g e
X X X X X X
Remove
Alasmidonta sp. 2
f
0 6 8 8 8 6 0 8
c - e g - h
b - c
9 4 4 5 4 0
c - e d - e
b - c
92
Triangle Floater Brook Floater
Alasmidonta undulata Alasmidonta varicosa Alasmidonta viridis
c
f f
e - f
9 9
e - f
c
X X X
101 104 121
b b b
h g
d b
d d a
g d a
b - c
Slippershell Mussel
10 10 10
b
Barrel Floater Alewife Floater
Anodonta [= Utterbackiana] couperiana Anodonta [= Utterbackiana] implicata
f
e - f
d - e e - g g - h
10
10
a - b b - c d - e
88
c
f - h
f
d - e
8 0
e - g
4 2
5
X X
5
Asian Clam
Corbicula fluminea
Y
f
h h e
h
h a d
f
0
g a
54 64 73 25
97
Purple Wartyback James Spinymussel Tar River Spinymussel
Cyclonaias tuberculata
N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
b a a
e
10
a a a c
10 10 10
10
a b b d
10
X
115 133
Elliptio [= Parvaspina = Pleurobema] collina Elliptio [= Parvaspina] steinstansana
10 10
b - e a - d
8 9
b - f a - c
8 9 2 1 4 4 2 3 8 8 2 4 1 8 9
d - g b - c
5 9 2 2 2 2 2 2 8 4 2 2 2 7 7 2 4 2 3 3 4 2 9 6 3 3 9 2 2 0 2 2 4 0 7 2 1 6 3 4 7 4
8 8 4 2 3 3 4 2 8 8 4 5 9 8 7
X X
b - d
b - d
e h e
6 0 6 6 6 4 7
f
72 44 70 59 80 49
h h
g
7 0 9 9
g g g g g g
Carolina Lance Eastern Elliptio Carolina Slabshell Northern Lance
Elliptio angustata Elliptio complanata Elliptio congaraea Elliptio fisheriana Elliptio folliculata Elliptio icterina
f f f f
0 0 0 0 1 0
7
f - h
g - h
f
d - e
28 30 33 18 64 51 27 35 39 31 59 36 37 34 51 35 51 35 73 57 33 37 68 48 56 32 13 25 31 29 62 25 11 45 34 40 58 51
g-h
f-g
f-g
b b a d
c-e
X
g g h
d - f
e - g
4 6 3 7 4
f - g
c - e
X
X
*Add
Pod Lance
e
e
e
g
10
d
X X X
Variable Spike Yellow Lance Cape Fear Spike Atlantic Spike Roanoke Slabshell Waccamaw Spike
f
f
f - g d - e
f - h d - e
4
d - e
X X
X X X
X
112
Elliptio lanceolata Elliptio marsupiobesa Elliptio producta Elliptio roanokensis Elliptio waccamawensis
a e
10
f
c - e
a a
10 10
c - d
b b d
98 74 78 91 83
1 0 6 6 1 8 0 8 1 6 6 0 0
e
c
8
f
d g
f
g - h
e
6 4 9
f
4 4 2
b - c
8
g g g d d
f
X
*Add
c c
g - h
f
e - g
e - h g - h
b a
9
c - d a - b
Lake Waccamaw
X X X X X
X
Remove
h h
a - c
g d d
10
Spike
Eurynia dilatata Fusconaia masoni
e b
7 7 8 4 7 3 5 5 7 9 8 4 4
e
b
X
X X
X X
111
Atlantic Pigtoe
d - f
e - f
5
c - e
b
9
b - c
86 85 87
Longsolid
Fusconaia subrotunda Lampsilis cariosa Lampsilis fasciola Lampsilis fullerkati Lampsilis radiata
f
f
c
b
10
g
a
10
X
Yellow Lampmussel
b e
h h
f
4
e - g
d - g
5 6 5 7 8 2
b a a b a a a b b a a a a a d a c a a b d c c a a b
9
e - g
c - e
3 8
X X
*Add
Wavyrayed Lampmussel Waccamaw Fatmucket Eastern Lampmussel Chameleon Lampmussel Rayed Pink Fatmucket Carolina Heelsplitter
d
f
10 10
g
b a
X
101
Remove
f - g f - g e - g
10
c c
e - h
a - b f - h b - c
10
f - g e - f d - g
e - g e - f c - f
X X
78
*Add
h
2 9 6 8 4 2 2
9
c - e b - c
3 7 8 8 7 6 6
X
104
c-e
Lampsilis sp. 2
f f
10 10 10
X X
X X X
83
*Add
Lampsilis splendida Lasmigona decorata Lasmigona subviridis Leptodea ochracea
h
e c
d b
g a
g b
b b
X X
121 110
a b
10
c
10
New
Green Floater
8 6 6
e - f
f
b - e e - g e - g
c - f f - h e - g
8 3 5
9 9
b - g f - g f - g
b - c b - d b - d
77 80
Tidewater Mucket Eastern Pondmussel Littlewing Pearlymussel Tennessee Clubshell
c c
h
g g
X
*Add
Ligumia nasuta Pegias fabula
g - h
10 10 10 10 10
X X X
X
X X X
123 100 108
a b b
10
c g g h h h
a c c g g
10
a d a a
10
b g g h g g
a a a a
10 10 10 10
Pleurobema oviforme Pleuronaia barnesiana
8 8 0 0 0 6 0 8 0 0 1 0 1 0 8
8 8 2 2 1 5 1 8 3 1 6 4 7 7 4
8
Tennessee Pigtoe Pink Heelsplitter Eastern Floater Giant Floater
e
6
10 10
X
81 44 54 82 29
*Add
Potamilus alatus
f f f
X X X X X X X X X
Pyganodon cataracta Pyganodon grandis Strophitus undulatus Toxolasma parvum
h h h h
0 0 0 0 4 4 0 5 6
f - h e - g e - g b - d c - d f - g f - h d - e e - f
3 5 5 9 9 4 3 8 7 8
4
d - e b - c c - e
2 7 3 8 8 2 2 5 5 8 8 5
Exotic in Atlantic Slope
X
g - h c - g g - h b - d f - g g - h
10
*Add
Creeper Lilliput
c
g - h g - h
7
e - g
X X
Y
f
10 10
h
b b
X
X
120
Savannah Lilliput Florida Pondhorn Paper Pondshell Notched Rainbow Eastern Creekshell
Toxolasma pullus
N N N N N N N N
b
e
f f
c - e
56 41 95 90 92
Uniomerus carolinianus Utterbackia imbecillis
f f
g - h
9 4 7 7
g
d - e d - e c - d c - d
h
h
g - h d - f f - g
X X X X X
Villosa constricta Villosa delumbis
e
e - f
7 2 2 8 6
e - f
e
X X
f
g g d
e
f
Rainbow
Villosa iris
e
d
d
10 10
f
b b
X
116 107
Eastern Rainbow Carolina Creekshell
Villosa modioliformis Villosa vaughaniana
f
c - d
8 7
d - e
a - c
10
d - e
X
X
b
f
d
f
d
8
9
f
c - d
Updated July 2020
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