Belongs within: Volutoidea. The lyriin volutes Published 18 June 2024 Among the various gastropods that have long caught the attention of shell collectors and malacologists, we would have to include the volutes. These carnivorous gastropods have been particularly prized for the large size, sturdiness, and striking coloration of many species. Looking among the subgroups of… Continue reading Lyriini


Belongs within: Clavatulidae. Eosurcula: a brief explosion Published 24 April 2024 The Claiborne Formation is an extensive accumulation of clays and sandstones extending across the southeastern USA, with outcrops in Arkansas, Illinois, Kentucky and Texas. It formed during the middle Eocene, over a series of rapid marine transgressions followed by slower regressions (Eargle 1968). The… Continue reading Eosurcula


Belongs within: Heterobranchia.Contains: Triptychia, Albinaria, Clausiliinae, Alopiinae, Phaedusinae. The Clausilioidea are high-spired land snails with well-developed plicae. The clausilioids Published 23 February 2009 The Clausilioidea are a superfamily of Stylommatophora (land snails). In the system of Bouchet et al. (2005), four families are assigned to this group—Palaeostoidae, Filholiidae, Anadromidae and Clausiliidae. The first three of… Continue reading Clausilioidea


Belongs within: Turridae. Deep sea divergence Published 19 February 2024 I have often had cause before to remark on the taxonomic morass that is represented by the assemblage of gastropods historically referred to as the ‘Turridae’. Recent decades have seen this family undergo multiple revisions, as more modern methods have confirmed what was long suspected,… Continue reading Cryptogemma


Belongs within: Pseudomelatomidae. Pseudomelatoma‘s mysterious teeth Published 27 December 2023 In many older texts, you will find members of the gastropod superfamily Conoidea referred to as the ‘Toxoglossa’. This name, meaning ‘poison tongue’, was inspired by the modification of their radula to deliver a powerful hit of venom to knock out prey. In its most… Continue reading Pseudomelatoma


Belongs within: Marginellinae. Shining margins Published 1 November 2023 Perhaps the first thing to be noticed about the margin snails of the Marginellidae is how shiny they are. Next is likely to be how brightly they are coloured; even those species where the shell is largely white are typically strikingly patterned. Margin shells must surely… Continue reading Glabella


Belongs within: Littorinina.Contains: Cyclostoma, Littorininae, Lacuninae, Annulariinae. Hey, Abbottella! Published 16 August 2023 Among the world’s many biogeographical curiosities, particular note should be made of the island of Hispaniola. The islands of the West Indies began forming, probably during the early Cenozoic, as the Caribbean tectonic plate was squeezed between the approaching North American and… Continue reading Littorinoidea


Belongs within: Patellogastropoda. Patella is a genus of limpets found in the northeastern Atlantic (Nakano & Ozawa 2004). Representatives have a solid shell with a subcentral apex that may be marked by strong radial ribs (Knight et al. 1960). Limpets of the Northeast Atlantic Published 10 December 2012 When Linnaeus published the tenth edition of… Continue reading Patella


Belongs within: Trochidae. The Trochinae are a group of marine gastropods with conical or turbiniform, nodose shells with a quadrangular aperture with strongly discordant lips. Their fossil record extends from the Upper Cretaceous to the present. In the Miocene to recent genus Trochus, the shell is conical and has a more or less flattened base.… Continue reading Trochinae


Belongs within: Vetigastropoda.Contains: Bolma (Bolma), Turbo (Marmarostoma). The Turbininae are marine gastropods with strong, solid shells bearing a calcareous operculum; whorls may be rounded or more or less carinate. Members of the genus Turbo have shells with rounded whorls, a convex base, rounded aperture and near-circular, outwardly convex operculum (Knight et al. 1960). A group… Continue reading Turbininae