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Record: oai:ARNO:588034

AuthorsAlexis Rojas, Austin Hendy, Gergory P. Dietl
TitleEdge-drilling behavior in the predatory gastropod Notocochlis unifasciata (Lamarck, 1822) (Caenogastropoda, Naticidae) from the Pacific coast of Panama: taxonomic and biogeographical implications
JournalVita Malacologica
Keywordsbiological interactions; drilling predation; Central America
AbstractWe conducted a laboratory study to determine drillhole siteselectivity
patterns in the predatory behavior of Notocochlis unifasciata
(Lamarck, 1822), which is a common naticid gastropod
on the eastern Pacific coast of Central America, preying on two
infaunal venerid bivalves – the thin-shelled and weakly ornamented
Leukoma grata (Say, 1831) and the thick-shelled and
strongly ornamented Iliochione subrugosa (Wood, 1828). Spatial
patterns of drillhole distribution indicate strong preferences for
drilling the umbonal region and the ventral edge of the shell, with
the proportion of edge- to wall-drilling attacks increasing in
thicker, strongly ornamented prey that were larger than their
predator’s own size. Drilling patterns from museum and beach
samples of I. subrugosa collected across the geographic range of
N. unifasciata (Panama to Costa Rica) were consistent with laboratory
findings. Review of the confirmed cases of edge-drilling
behavior by other naticids indicates that this study is the first
confirmed report of the behavior in the naticid subfamily
Naticinae. In light of these findings, we discuss hypotheses on
the geography and ecology of edge-drilling predation by subtropical
and tropical naticids to guide future research.
Document typearticle
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