''Fusipagoda sapia'' is a

species In biology, a species is the basic unit of 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 the appropriate s ...

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

, a marine

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusc 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 esti ...

in the

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

Retimohniidae The Retimohniidae are taxonomic family in the superfamily Buccinoidea of large sea snails, often known as whelk Whelk (also known as scungilli) is a common name applied to various kinds of sea snail. Although a number of whelks are relati ...

, the true whelks and the like.MolluscaBase eds. (2022). MolluscaBase. Fusipagoda sapia (Dall, 1919). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=853032 on 2022-11-23

Description

(Original description as ''Colus (Aulacofusus) sapius'') The small, thin shell measures 22 mm. The apical

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 floral ...

s are eroded, but six prominently rounded whorls remain. The suture is distinct and is not appressed. The whorl in front of it is flattened and without spiral

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 ...

for a short distance. The shell is white with a straw-colored periostracum. The axial sculpture consists of faint incremental striae. The spiral sculpture consists of (on the penultimate whorl about eight) strong squarish ribs with subequal rather deep, channeled interspaces. Both are slightly wrinkled by the incremental lines and become obsolete on 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 ...

. There are a few minor spirals behind the posterior rib. 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 opt ...

is roundly ovate. The thin outer lip is simple. The inner lip is erased. The white columella is twisted; its axis pervious. The narrow siphonal canal is rather long, well defined and somewhat recurved.Dall, W. H. (1919). Descriptions of new species of Mollusca from the North Pacific Ocean in the collection of the United States National Museum. Proceedings of the United States National Museum. 56 (2295): 293-371
/ref>

Distribution

This marine species occurs southwest of

Sitka russian: Ситка , native_name_lang = tli , settlement_type = Consolidated city-borough , image_skyline = File:Sitka 84 Elev 135.jpg , image_caption = Downtown Sitka in 1984 , image_size ...

, Alaska.

References

* Kosyan A.R. & Kantor Yu.I. (2015). Notes on the abyssal genus Fusipagoda Habe et Ito, 1965 (Neogastropoda: Buccinidae) from the North Pacific. Ruthenica. 25(3): 77-87.

External links

* {{DEFAULTSORT:Fusipagoda Sapia Retimohniidae Gastropods described in 1919