unio dorsally biology halves hinged ventrally
unio mussel foot visible swollen germany alamy river
shell unio differing mancus brugent bourget
unionidae mussels freshwater anodonta figure scabies sp zookeys
unio kinneret israel differing shapes
unio aphotofauna bivalve mussel swollen river valves shell interior
pictorum unio contour frontal longitudinal perpendicular
unio gibbus morphology tunisia dimensions