''Diaugasma'' 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 ...

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 ...

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 ...

Raphitomidae Raphitomidae is a Family (biology), family of small to medium-sized sea snails, marine (ocean), marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families" ...

Description

The minute shell is oliviform, smoother microscopically spirally striolate, mainly on each side of the sutures, leaving the central portion of the

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). In nature File:Photograph and axial plane floral diagra ...

plain, in form cylindrical or elongate, compact, only slightly impressed at the sutures. The whorls of the

protoconch A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called " ...

are closely and very finely cancellate. The whorls are semi-pellucid, unicolorous white, or flecked with pale stramineous. 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 narrowly oblong. The outer

lip The lips are a horizontal pair of soft appendages attached to the jaws and are the most visible part of the mouth of many animals, including humans. Mammal lips are soft, movable and serve to facilitate the ingestion of food (e.g. sucklin ...

is nearly straight, slightly thickened,. The sinus is hardly expressed.

Species

Species within the genus ''Diaugasma'' include: * ''

Diaugasma epicharta ''Diaugasma epicharta'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Diaugasma epicharta (Melvill & Standen, 1903). Accessed through: World Register of Marine Species at: htt ...

'' (Melvill & Standen, 1903) * ''

Diaugasma olyra ''Diaugasma olyra'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Diaugasma olyra (Reeve, 1845). Accessed through: World Register of Marine Species at: http://www.marinespecie ...

'' (Reeve, 1845) ;Species brought into synonymy: * ''Diaugasma marchadi'' (Knudsen, 1956): synonym of ''

Kyllinia marchadi ''Kyllinia marchadi'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.Gofas, S. (2011). Kyllinia marchadi (Knudsen, 1956). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www. ...

'' (Knudsen, 1956)

References

External links

Melvill J.C. & Standen R. (1903). ''Descriptions of sixty-eight new Gastropoda from the Persian Gulf, Gulf of Oman, and North Arabian Sea, dredged by the Indo-European Telegraph Service, 1901–1903.'' Annals and Magazine of Natural History. ser. 7, 12: 289-324

Rolán E., Otero-Schmitt J. & Fernandes F. (1998) The family Turridae s. l. (Mollusca, Neogastropoda) in Angola (West Africa). 1. Subfamily Daphnellinae. Iberus, 16: 95–118

{{Taxonbar, from=Q3717837 Raphitomidae Gastropod genera