Olindias sambaquiensis Muller, 1861 (Olindiidae) is an abundant and common hydromedusae in the southern Brazilian littoral region. Morphology of 1092 specimens collected in coastal waters at Guaratuba, in Paraná, southern Brazil, was studied. The form, number and branching of the radial and centripetal canals were variable in only 70 individuals (6.4%), which, in some cases, were associated with apparent changes in symmetry pattern.
Hydromedusae; morphology
