''Phymorhynchus clarinda'' 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 ...

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 e ...

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 ...

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). . 39 ...

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

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 arenot 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 is ...

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 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 In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and fo ...

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

Distribution

This marine species occurs in the Pacific Ocean off Panama Bay and Malpelo Island,

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

at a depth of 3,240 m.

References

External links

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