A short research note was recently published by Carvalho & Oliveira. It is about the defecation behaviour of a terrestrial snail from Brazil, Cochlorina aurisleporis (Bruguière, 1792).
After noting the overall scarcity of data in literature on this behaviour in many animals, the authors describe the process in this arboreal snail, which uses it muscles to form a more or less spherical pellet and finally drops the pellet onto the substrate beneath. They suggest as hypothesis to explain this behaviour that it may be a strategy to prevent detection by chemically oriented predators. Although this hypothesis is interesting, it would need further testing in the field. For a start, the predators of this species are unknown as the biology of Neotropical land snails is hardly documented in literature. The authors also made a statement its distribution, viz. “a purported (and unexpected) disjunct distribution”, being known from Madagascar and Brazil. It is simply based on an erroneous original locality in Bruguière (in the 18th and 19th century species were often described based on material collected by others and many times with vague, imprecise or even erroneous localities). Cochlorina aurileporis is purely a Brazilian species; it is unfortunate that the reviewers have overlooked this.
Carvalho de Lima, T. & Oliveira, C.D. de Castro, 2020. Unusual shaping: The defacation bahavior in Cochlorina aurisleporis (Bruguière, 1792) (Gastropoda: Bulimulidae). – The Nautilus 134(1): 57-59.