''Phymorhynchus clarinda'' 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), ...

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 ...

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 length of the shell attains 39 mm, its diameter 18 mm. (Original description) The thin, fusiform shell is white, with a pale yellowish periostracum,. It contains six

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 ...

s rounded, flattened a little over the anal fasciole in front of the suture, which is very distinct but not channelled. The protoconch is eroded. The subsequent whorls show between the suture and the shoulder five or six fine, sharp, spiral threads with wider interspaces, which are not beaded by the concavely arcuate growth lines which are prominent on the fasciole. At the shoulder is a weak spiral ridge, followed by five stronger ones, subequal and equidistant with wider interspaces. On a sixth similar ridge the suture is wound, followed by, on the base, about thirty similar but less prominent ridges which gradually diminish in size and strength, and approximate more closely to each other until 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 i ...

is reached. Over all these ridges and interspaces fine sharp threads run spirally, as on the fasciole and are perhaps a little more prominent on the ridges, where they are rendered more or less scabrous by the elevated lines of growth. 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 thin with a shallow rounded excavation, near the suture, which forms the

anal sulcus The anal sulcus, also called the anal sinus or anal canal, in Gastropods is a notch, a shelly tube at the top of the Aperture (mollusc), aperture. It is the first notch close to the Suture (anatomy), suture. It houses the anal siphon through which t ...

. The body is polished, with the spiral sculpture erased. 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 ...

is thin, gyrate, pervious, white, with a slightly thickened edge. The siphonal canal is short, wide, slightly recurved.W.H. Dall (1908) Reports on the Mollusca and Brachiopoda, Bulletin of the Museum of Comparative Zoology at Harvard College. vol. 43
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Distribution

This marine species occurs in the Pacific Ocean off

Panama Bay The Panama Bay () is a large body of water off the coast of southern Panama, at . It is a part of the greater Gulf of Panama. Pollution Problems The Panama Bay is considered to be in an eutrophic state by the World Resources Institute. This ...

and

Malpelo Island Malpelo is a small oceanic island in the eastern Pacific Ocean, located about west of the Colombian mainland with a military post manned by the Colombian Armed Forces. It consists of a sheer and barren rock with three high peaks, the highest ...

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

at a depth of 3,240 m.

References

External links

*
Gastropods.com: ''Phymorhynchus clarinda''
{{DEFAULTSORT:Phymorhynchus Clarinda clarinda Gastropods described in 1908