A description is given of the shell, head-foot, pulmonary wall, reproductive system and radula of Biomphalaria subprona (Martens, 1899). A diagnosis between it and two other congeneric species under 10 mm in shell diameter occurring in Middle America (Biomphalaria helophila and B. schrammi) is presented.
Biomphalaria subprona; Biomphalaria helophila; Biomphalaria schrammi; morphology; taxonomy; Guatemala
