''Daphnella evergestis'' is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

of sea snail, a marine gastropod

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is es ...

in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Raphitomidae Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". '' Malacologia'' 47(1-2). . 3 ...

Description

The length of the shell attains 12 mm, its diameter 4 mm. The color of the whitish or straw shell is variegated with darker maculations on some examples. The shell is elegantly fusiform. It contains 8

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). Whorls in nature File:Photograph and axial plane flo ...

s. These are rounded but much impressed at the sutures. The two almost vitreous whorls in 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 calle ...

are most delicately decussate. The remainder of the whorls are closely obliquely ribbed, crossed by many spirals, slightly gemmulate at the points of junction. This gives a white shining appearance to the ribs, which on the body whorl number about twenty-six. The

aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An ...

is oval. The outer

lip The lips are the visible body part at the mouth of many animals, including humans. Lips are soft, movable, and serve as the opening for food intake and in the articulation of sound and speech. Human lips are a tactile sensory organ, and can be ...

is thickened. The sinus is very superficial, but broad, close below the suture. The

siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water ...

is slightly recurved and short. Melvill & Standen (1901) Mollusks from the Persian Gulf and Arabian Sea; Proceedings of the Zoological Society of London. v. 2, 1901

Distribution

This marine species occurs in the

Gulf of Oman The Gulf of Oman or Sea of Oman ( ar, خليج عمان ''khalīj ʿumān''; fa, دریای عمان ''daryâ-ye omân''), also known as Gulf of Makran or Sea of Makran ( ar, خلیج مکران ''khalīj makrān''; fa, دریای مکرا� ...

References

External links

* {{DEFAULTSORT:Daphnella Evergestis

evergestis ''Evergestis'' is a genus of moths of the family Crambidae described by Jacob Hübner in 1825. A number of species are pests, including the cross-striped cabbageworm (''E. rimosalis''), a pest of cole crops such as cabbage.Sparks, A. and D. G. R ...

Gastropods described in 1901