Cassidae

Belongs within: Tonnoidea.Contains: Cassis, Phalium, Semicassis. The Cassidae, helmet shells, are medium-sized to large marine gastropods found burrowing in sand. They are predatory on echinoids which they attack by squirting a paralysing salivary juice. Females lay large egg-masses containing hundreds of gelatinous capsules; in some cases large irregular masses may be produced seemingly by several… Continue reading Cassidae

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Categorised as Tonnoidea

Ranellidae

Belongs within: Tonnoidea. The Ranellinae are a group of marine gastropods bearing a solid shell with prominent varices. The radula bears a broad, multicuspid central tooth with a long central cusp, and smooth lateral and marginal teeth. <==Ranellidae [Ranellacea, Ranellina, Ranellinae] | i. s.: ‘Cancellaria’ dertocrenata Sacco 1894PH90 |–Eoranella kiliani Sayn 1932TTE93 |–Biplex Perry 1811WG71… Continue reading Ranellidae

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Categorised as Tonnoidea

Tonnoidea

Belongs within: Hypsogastropoda.Contains: Mataxidae, Bursidae, Ranellidae, Tonnidae, Cassidae, Ficus, Cymatiinae, Argobuccininae, Personidae, Eosassiidae. The Tonnoidea are a group of often large marine gastropods with particularly large larval shells, reaching diameters up to 5.4 mm, and a well-developed periostracum that extends past the apertural opening during the larval stage (Bandel & Dockery 2012). Members of the… Continue reading Tonnoidea

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Categorised as Tonnoidea

Tonnidae

Belongs within: Tonnoidea. The Tonnidae, tun shells, are a group of generally large sand-dwelling gastropods most commonly found in deeper water. The live animal has a very large body when fully extended with a wide, rather flat foot (Wilson & Gillett 1971). They are predators on sea cucumbers, swallowing them whole with their proboscis. Charactgers… Continue reading Tonnidae

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Categorised as Tonnoidea

Bursidae

Belongs within: Tonnoidea. The Bursidae, frog shells, are a group of marine gastropods that are most commonly found in shallow water among coral or rocks. The shell is usually heavy and strongly ornamented, commonly with a warty appearance that gives rise to the vernacular name. They may be distinguished from related, similar shells among the… Continue reading Bursidae

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Categorised as Tonnoidea

Personidae

Belongs within: Tonnoidea. The Personidae are a small group of marine gastropods with a characteristically distorted coiling, found at moderate depths in warm waters. Past classifications included them among the Ranellidae but more recent authors have argued that many of the common features of the two families evolved in parallel. Within the Personidae, members of… Continue reading Personidae

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Categorised as Tonnoidea

Cymatiinae

Belongs within: Tonnoidea.Contains: Cymatium (Monoplex), Cymatium (Ranularia). The Cymatiinae, tritons and trumpet shells, are a group of predatory marine snails with usually thick and strongly sculptured shells. The whorls often bear strong varices that rarely line up with those of adjacent whorls. Some members of this group are very large; the giant triton Charonia tritonis… Continue reading Cymatiinae

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Categorised as Tonnoidea