''Calliostoma shinagawaense'' 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 Calliostomatidae. Some authors place this taxon in the subgenus ''Calliostoma (Tristichotrochus)''. ;Subspecies: * ''Calliostoma shinagawense cipangoanum'' Yokoyama, 1920 * ''Calliostoma shinagawense shinagawense'' (Tokunaga, 1906)

Description

The height of the shell varies between 12 mm and 40 mm. The sides of the shell are flat, giving it a triangular profile. The

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 are heavily sculptured with strongly beaded spiral cords along the periphery and the subsutural region with weakly beaded spiral cords in between. The umbilicus is closed. The aperture (opening) is nacreous (pearly). The base is almost flat and is sculpted with numerous minutely granulated spiral cords. The color is yellowish brown with reddish brown maculations.''Shells of the Western Pacific in Color, Vol. 2'' (1968) by Tadashige Habe, Hoikusha Publishing Co., Ltd., p. 13

Distribution

This species occurs from

Kyushu is the third-largest island of Japan's five main islands and the most southerly of the four largest islands ( i.e. excluding Okinawa). In the past, it has been known as , and . The historical regional name referred to Kyushu and its surroun ...

to Honshu,

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 ...

across to the Bōsō Peninsula on sand and gravel bottoms at depths of 5 to 50 m. It also occurs in the

East China Sea The East China Sea is an arm of the Western Pacific Ocean, located directly offshore from East China. It covers an area of roughly . The sea’s northern extension between mainland China and the Korean Peninsula is the Yellow Sea, separated b ...

and off Taiwan.

References

* Sasaki T. (2017). Family Calliostomatidae. Pp. 756-759, in: T. Okutani (ed.), Marine Mollusks in Japan, ed. 2. 2 vols. Tokai University Press. 1375 pp.

External links

*
Tokunaga, S. (1906). Fossils from the environs of Tôkyô. Journal of the College of Science, Tokyo Imperial University. 21(2): 1-96, 5 pls
{{DEFAULTSORT:Calliostoma Shinagawaense shinagawaense Gastropods described in 1906