Biomphalaria [SEP] parent taxon
Biomphalaria
Biomphalaria is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies. 
"Biomphalaria" is the type genus of the tribe Biomphalariini.
"Taphius" is a synonym for "Biomphalaria".
The shell of this species, like all planorbids is sinistral in coiling, but is carried upside down and thus appears to be dextral.
Species.
As of 2008 there were recognized 34 extant species in the genus "
Taxon in disguise
In bacteriology, a taxon in disguise is a species, genus or higher unit of biological classification whose evolutionary history reveals has evolved from another unit of similar or lower rank, making the parent unit paraphyletic. This happens when rapid evolution makes a new species appear radically different from the ancestral group, so that it is not (initially) recognised as belonging to the parent phylogenetic group, leaving the latter an evolutionary grade.
While the term is from bacteriology, parallel examples are found throughout the tree of