Caseolus sphaerulus

Caseolus sphaerulus is a species of small land snail, a terrestrial pulmonate gastropod mollusk. The specific epithet is spelled C. sphaerulus in both of the references here cited, however the species is also often referred to in reputable sources as C. sphaerula, for example in the Convention of Berne and the Habitats Directive. Here we are assum...
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