''Horaiclavus filicinctus'' is a species of

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 in the family

Horaiclavidae Horaiclavidae is a family of predatory sea snails, marine gastropod mollusks in the superfamily Conoidea. In 2011 this family was split off from the family Pseudomelatomidae (formerly the subfamily Crassispirinae McLean, 1971) by Bouchet P., Ka ...

. It was previously included within the family

Turridae Turridae is a taxonomic family name for a number of predatory sea snails, marine gastropod mollusks in the superfamily Conoidea. MolluscaBase (2018). Turridae H. Adams & A. Adams, 1853 (1838). Accessed through: World Register of Marine Specie ...

. This is the type species of ''

Cytharoclavus ''Cytharoclavus'' is a genus of sea snails, marine gastropod mollusks in the family Horaiclavidae.Bouchet, P. (2015). Cytharoclavus. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/ap ...

'' Kuroda & Oyama, 1971

Description

The length of the shell varies between 7 mm and 17 mm. The shell contains 6½

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 of which 1½ 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 called ...

..The aperture is pear-shaped. 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 very short and slightly recurved. The chief marks of distinction are the large apex, the third part of the

body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ...

near the outer lip lacking the costae, and the very fine reddish spiral lines, the last character existing also in ''Mangilia costulata'', Dunker 1860 (synonym of '' Cytharella costulata'' (Dunker, 1860) ), from which it differs in size, the absence of all spiral sculpture, and the character of the ribbing. Smith, E.A. (1882) Diagnoses of new species of Pleurotomidae in the British Museum. Annals and Magazine of Natural History, series 5, 10, 206–218
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Distribution

This marine species occurs off the Philippines, Taiwan and

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

; also in the Mozambique Channel .

References

External links

*
Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1–1295.

Specimen at MNHN, Paris
{{DEFAULTSORT:Horaiclavus Filicinctus filicinctus