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Vermeij, Geerat J.. |
Predation is a primary agency of natural selection affecting the evolution of skeletal form in gastropods. The nature of antipredatory defence depends on how predators attack their prey as well as on the types and quantities of resources that are available to the potential victims. Here I review the five main methods of predation on shell-bearing gastropods (swallowing prey whole, apertural entry, drilling, shell breakage, and partial consumption) and 31 categories of shell and opercular defence that are effective at one or more of the three stages of predation (detection, pursuit, and subjugation). These categories are evaluated for marine Palaeozoic, marine Late Mesozoic to Recent, freshwater, and terrestrial environments. The five types of... |
Tipo: Article / Letter to the editor |
Palavras-chave: Mollusca; Gastropoda; Predation; Antipredatory defence. |
Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/588036 |
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Vermeij, Geerat J.. |
Several gastropods, including members of the Busyconinae, wedge or chip bivalve prey by inserting the outer lip between the valves. This habit, which is associated with an abapically downwardly convex outer lip, often results in breakage and subsequent repair of the lip. I tested the hypothesis that convex-lipped clavilithines from the Eocene of France and the Neogene of Indonesia had higher frequencies of repair than their straight-lipped counterparts. Although this prediction was verified, frequencies of repair are low (0 to 0.19) compared to those of busyconines, indicating either that prey bivalves were small or that the predators are smaller than most busyconines. |
Tipo: Article / Letter to the editor |
Palavras-chave: Gastropoda; Clavilithes; Bivalvia; Predation; Outer lip. |
Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/588037 |
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