''Guttula'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

s, marine

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

s in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Seguenziidae Seguenziidae is a family (biology), family of very small deepwater sea snails, marine (ocean), marine gastropod mollusks in the superfamily Seguenzioidea (according to the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastr ...

Description

(Original description by Schepman) The small, shell has a conoidal shape. It is smooth, pearly, and perforate. The

aperture In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...

is rounded, with an angle at the base. The operculum contains few whorls. It is chiefly on account of the peculiar

radula The radula (; : radulae or radulas) is an anatomical structure used by mollusks for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters ...

, that Schepman had located the then only species in a new genus. Quin (1998) adds the following specifications. Shell: The shell has no peripheral carina, no axial riblets, no midwhorl angulation, no spiral lirae, no basal, posterior or anterolateral sinus, no columellar sinus. The

has a circular shape. The

columella Lucius Junius Moderatus Columella (, Arabic: ) was a prominent Roman writer on agriculture in the Roman Empire. His in twelve volumes has been completely preserved and forms an important source on Roman agriculture and ancient Roman cuisin ...

r tooth is absent. There is no umbilical septum. The shell has punctate microsculpture.

Radula The radula (; : radulae or radulas) is an anatomical structure used by mollusks for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters ...

: the rachidian tooth is broader than high and has the lateral wings prominent. The lateral tooth cusp is broad to absent.

Species

Species within the genus ''Guttula'' include: *'' Guttula blanda'' Barnard, 1963 *'' Guttula galatheae'' Knudsen, 1964 *'' Guttula sibogae''

Schepman Mattheus Marinus Schepman (17 August 1847 – 19 November 1919) was a Dutch malacologist. He was one of the foremost collectors of mollusc shells in the Netherlands, and was also high on the overall list of European collectors. Dutch collectors ...

, 1908

References

External links

''Quinn J. F. (1983). A revision of the Seguenziacea Verrill, 1884. I. Summary and evaluation of the superfamily''. Proceedings of the Biological Society of Washington 96 (4): 725-757
{{Taxonbar, from=Q5621943 Seguenziidae Gastropod genera