D. Massemin, S. Clavier & J.-P. Pointier 
Pisidium punctiferum and Eupera viridans from French Guiana 
test glossy light yellowish; 
surface very finely concentrically striated and uncovered 
with granular points; 
latéral teeth lower and shorter in left valve; 
size from 6 to 8 mm_ Pisidium sterkianum 
(Species probably présent) 
9 The test is cream colour ornamented with 
dark brown sports; 
one cardinal tooth on each valve; 
size of about 8 mm_ Eupera viridans (Fig. 8) 
I 18 
