| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: i-- metropolitan mesoregion. | in order to elaborate a planorbid chart of the state of rio de janeiro a survey of freshwater gastropods in the metropolitan mesoregion of this state was performed and revealed the occurrence of 20 species: antillorbis nordestensis (lucena, 1954); biomphalaria glabrata (say, 1818); biomphalaria schrammi (crosse, 1864); biomphalaria straminea (dunker, 1848); biomphalaria tenagophila (orbigny, 1835); burnupia sp.; drepanotrema anatinum (orbigny, 1835); drepanotrema cimex (moricand, 1839); drepanot ... | 2001 | 11586447 |