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Diaphanoidea
Diaphanoidea is a Taxonomy (biology), taxonomic Taxonomic rank, superfamily of small sea snails, marine (ocean), marine opisthobranch gastropod mollusks or micromollusks in the Cephalaspidea, the headshield slugs and bubble snails. Species in this superfamily have small, flimsy, almost globular shells, known as paper bubble gastropod shells. This superfamily is not monophyletic. Distribution Species in this superfamily are found in cold seas, such as the Arctic region, Antarctica, Australia, and New Zealand. Habitat The species occur in the littoral, sublittoral to abyssal zones. Shell description The gastropod shell, shell is minute, thin, fragile, colorless to translucent, and usually less than 5 mm in size. The overall shape is ovate, pear-shaped, and bulbous. There is a sunken apex (mollusc), apex. Families Families in the superfamily Diaphanoidea include: * Colinatydidae Oskars, Bouchet, and Malaquias, 2015 * Cylichnidae H. Adams & A. Adams, 1854 * Diaphanidae Odhne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalaspidea
The order Cephalaspidea, also known as the headshield slugs and bubble snails, is a major taxon of sea slugs and bubble snails, marine gastropod mollusks within the larger clade Euopisthobranchia.Jörger K. M., Stöger I., Kano Y., Fukuda H., Knebelsberger T. & Schrödl M. (2010). "On the origin of Acochlidia and other enigmatic euthyneuran gastropods, with implications for the systematics of Heterobranchia". ''BMC Evolutionary Biology'' 10: 323. . Bubble shells is another common name for these families of marine gastropods, some of which have thin bubble-like shells. This clade contains more than 600 species. Members of this worldwide clade used to be considered the most primitive of the opisthobranchs, but now they are considered as derived and specialized members of the Euthyneura Spengel, 1881. Headshield slugs are the most morphologically diverse group of all the opisthobranchs. Anatomy The vast majority possess a shell, although it may be reduced or internal. They have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |