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60 lithoglyphidae species
Somatogyrus pennsylvanicus
Somatogyrus pumilus
Somatogyrus rheophilas
Somatogyrus rosewateri
Somatogyrus walkerianus
Somatogyrus integer
Clappia cahabensis
Somatogyrus parvulus
Fluminicola gustafsoni
Fluminicola umpquaensis
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