J. Moll. Stud. (2000), 66, 129-130
© The Malacological Society of London
2000
Triple homoplasy in the clausilial apparatus: a columellar knob in Alopiinae (Gastropoda: Pulmonata: Clausiliidae)
National Museum of Natural History, P.O. Box 9517, NL 2300 RA Leiden, The Netherlands