''Pseudococculina rugosoplicata'' is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

of small

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 ...

, a 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 ...

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

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 ...

Pseudococculinidae Pseudococculinidae is a family of small sea snails or false limpets, marine gastropod mollusks in the superfamily Lepetelloidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Gofas, S. (2012). Pseudococculinidae. Acces ...

, the false

limpet Limpets are a group of aquatic snails with a conical gastropod shell, shell shape (patelliform) and a strong, muscular foot. This general category of conical shell is known as "patelliform" (dish-shaped). Existing within the class Gastropoda, ...

s.Bouchet, P. (2012). ''Pseudococculina rugosoplicata'' Schepman, 1908. Accessed through:

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...

at http://www.marinespecies.org/aphia.php?p=taxdetails&id=579371 on 2013-02-02

Description

The small, white shell has an elevated form. It is oval and thin. The margin rests entirely on a plane surface. The front slope is the largest and has a convex shape. The side slopes are irregularly convex, being slightly compressed at some distance from the

apex The apex is the highest point of something. The word may also refer to: Arts and media Fictional entities * Apex (comics) A-Bomb Abomination Absorbing Man Abraxas Abyss Abyss is the name of two characters appearing in Ameri ...

. The posterior slope is slightly concave. The apex is blunt, placed at about two-thirds of the total length. There is no nucleus caused by a strong erosion of the apex. The

sculpture Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts. Durable sc ...

consists of irregular concentric rugosities or wrinkles, generally more distant from each other towards the apex, more crowded towards the margin, with a tendency to form lamellae. On some parts the upper side of the rugosities has coarse, short, riblike radiant striae, wanting in other places, perhaps by erosion. The inside of the shell has a smooth surface. The rhachidian tooth of the

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 ...

is elongate with convex sides. It has no reflected cusp, the upper margin being only irregularly waved. Near the base an oval spot seems to be thickened. The first lateral tooth is triangular, also without a distinct cusp, but with a reflected or thickened upper margin. It is followed by three laterals, which are little different from each other, with a winged body, having the appearance of being turned outwards, the cusp standing at the distal side. Their cusps are simple. The next lateral has a quadrate body with a thickened stalk The rhachidian tooth stands at its median line, and a cusp consisting of a sharp tooth at the proximal side, and a wing-like part on the distal side, with a slightly denticulate margin. Of the numerous uncini, the proximal ones, which are the largest, have simple cusps, while those placed more outwards have small denticles.Schepman M.M. (1909), The prosobranchia of the Siboga Expedition
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Distribution

This marine species occurs in the Indo-Australian archipelago.

References

External links

Biodiversity Heritage Library (3 publications)

World Register of Marine Species
{{Taxonbar, from=Q7254672 Pseudococculinidae Gastropods described in 1908