Monthly precipitations in the distributions of pomatiopsine genera. Values for each genus, except for Idiopyrgus and Tomichia, are average of 5 localities which was randomly selected from the distribution. The precipitation data were obtained from the World Meteorological Organization (WMO; http://www.wmo.int/ webcite). Blue and orange lines represent genera in Northern and Southern Hemisphere, respectively. Distribution of Fukuia and Blanfordia has especially high precipitation during winter (shaded period). B, Blanfordia; Co, Coxiella; F, Fukuia; I, Idiopyrgus; O, Oncomelania; P, Pomatiopsis; T, Tomichia.
Kameda and Kato BMC Evolutionary Biology 2011 11:118 doi:10.1186/1471-2148-11-118