Stygobromus of the Virginias, Maryland and District of Columbia

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Supported by the Cave Conservancy of the Virginias and the Subterranean Ecology Institute, Inc. 


Over 150 species of Stygobromus amphipods occur across temperate North America. This ecologically and geographically diverse genus can be found living in seeps, springs, and cave habitats, and, thus, serve as important indicators of groundwater quality. Forty-three species have been described from the Virginias, Maryland and District of Columbia, while another three species have been recorded from these states. We are conducting conservation assessments of each Stygobromus species in this region to identify and prioritize species and populations of greatest conservation concern, which includes ascertaining threats and factors associated with extinction risk. In addition, we are collecting specimens through our fieldwork to serve as morphological and molecular reference material for future systematic studies. We hope that this project helps promote awareness of imperiled subterranean crustaceans in the Virginias, including Stygobromus amphipods.


Number of localities by state


Species
DC
MD
VA
WV
Total
Photo
Stygobromus abditus
 
 
11
 
11
 
Stygobromus allegheniensis
 
18
 
6
24
 
Stygobromus amicus
 
3
 
 
3
 
Stygobromus araeus
 
 
22
 
22
 
Stygobromus baroodyi
 
 
8
 
8
 
Stygobromus biggersi
 
3
6
1
10
Yes
Stygobromus caecilius
 
1
 
 
1
 
Stygobromus conradi
 
 
15
 
15
 
Stygobromus cooperi
 
 
 
1
1
 
Stygobromus culveri
 
 
 
3
3
 
Stygobromus cumberlandus
 
 
8
 
8
 
Stygobromus emarginatus
 
2
 
47
49
Yes
Stygobromus ephemerus
 
 
3
 
3
 
Stygobromus estesi
 
 
7
 
7
 
Stygobromus exilis
 
 
1
 
1
 
Stygobromus felleri
 
1
 
 
1
 
Stygobromus fergusoni
 
 
3
 
3
 
Stygobromus finleyi
 
 
4
 
4
 
Stygobromus foliatus
 
3
5
 
8
 
Stygobromus franzi
 
20
 
10
30
 
Stygobromus gracilipes
 
5
12
5
22
Yes
Stygobromus hayi
3
 
 
 
3
 
Stygobromus hoffmani
 
 
4
 
4
 
Stygobromus hubbardi
 
 
1
 
1
 
Stygobromus indentatus
 
10
13
 
23
 
Stygobromus interitus
 
 
1
 
1
 
Stygobromus kenki
3
2
 
 
5
 
Stygobromus leensis
 
 
5
 
5
 
Stygobromus mackini
 
 
110
6
116
 
Stygobromus mausi
 
 
1
 
1
 
Stygobromus morrisoni
 
 
7
2
9
Yes
Stygobromus mundus
 
 
5
 
5
Yes
Stygobromus nanus
 
 
 
2
2
 
Stygobromus obrutus
 
1
 
 
1
 
Stygobromus parvus
 
 
 
8
8
 
Stygobromus paxillus
 
1
 
 
1
 
Stygobromus phreaticus
 
3
 
 
3
 
Stygobromus pizzinii
2
36
13
 
51
 
Stygobromus pollostus
 
 
 
7
7
 
Stygobromus pseudospinosus
 
 
1
 
1
Yes
Stygobromus redactus
 
 
 
2
2
 
Stygobromus sextarius
3
1
2
 
6
 
Stygobromus spinatus
 
 
 
63
63
Yes
Stygobromus spinosus
 
 
10
 
10
Yes
Stygobromus stegerorum
 
 
3
 
3
 
Stygobromus tenuis potomacus
24
83
37
 
144
 
Stygobromus tenuis tenuis
 
3
 
 
3
 



© Stygobromus Working Group 2014