Titlebook: Sea Snails; A natural history Joseph Heller Book 2015 Springer International Publishing Switzerland 2015 gastropod defence.gastropod food.g

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Functional Morphology: An Evolutionary Perspectivehey also separate reproduction stages in time: copulation and sperm-transfer are separated from ova fertilisation, and fertilisation from spawning. Special pouches inside the female body store sperm, enable fertilisation and form capsules in which eggs and nutrients are deposited. These capsules spa

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Grazers and Filter Feederswell within sponges. Worm snails (Vermetoidea), with shells lacking orderly coils, cement themselves to rocks. Some use gills to filter feed; others secrete mucus and form plankton trapping nets. Males shed spermatophores which, if trapped in a female’s net, are hauled in and fertilise the ova; some

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Predatorsextendable trunk; hooked teeth hold on to it and rip its flesh, or pointed hollow teeth stab prey and inject poison. Some Tuns (Tonnoidea) feed on sea urchins, dissolving the victim’s calcareous skeleton with acid. Moon shells (Naticoidea) glide over muddy-sandy sea floors with a foot swollen by sea

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Shell Degeneration: Sea Slugs and Relativesfoot and the gill at the rear; most are simultaneous hermaphrodites, fertilisation is internal. Shield slugs (Cephalaspidea) are predators or herbivores. Mating partners usually alternate sexual roles; but sometimes copulations are outcomes of stabbing contests: rapidly stabbing partners mate as mal

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Sacred Sounds from Sea Shellsions would feast on human flesh, so people fled and nobody came to a funeral when a comrade had died. Tyrrhenus avoided this by blowing a shell trumpet, thereby declaring they now intended not to devour them. In line with this myth, Romans depicted shell trumpets in tombs and sarcophages..The Chavín

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