''Roseaplagis caelatus'' is a species of small

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 ...

in the family Trochidae, the top shells.

Description

It is smaller than '' Cantharidus sanguineus'' (height: 5.5 mm, diameter 4.5 mm) but it is more deeply ribbed and its grooves are wider. The imperforate shell is more deeply ribbed, and the ribs narrower. They number 5 to 7 on the penultimate

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 ...

, 15 to 16 on 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 ...

. Sometimes they are obsoletely granose through being crossed by growth lines. The columella shows a slight swelling in the middle.Suter H. (1913-1915), Manual of New Zealand Mollusca; Wellington, N. Z. :J. Mackay, govt. printer,1913-1915
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Distribution

This marine species is endemic to New Zealand and occurs off the Foveaux Straits; Port Pegasus, Stewart Island; Snares and Bounty Islands

Subspecies

The former subspecies have been named: * ''Micrelenchus caelatus archibenthicola''

Dell Dell is an American based technology company. It develops, sells, repairs, and supports computers and related products and services. Dell is owned by its parent company, Dell Technologies. Dell sells personal computers (PCs), servers, data ...

, 1956: synonym of ''Cantharidus caelatus mortenseni'' Powell, 1933; synonym of ''

Roseaplagis mortenseni ''Roseaplagis mortenseni'' is a species of sea snail in the family Trochidae, the top snails. The shell grows to a length of 7 mm. This marine species occurs off New Zealand, the Antipodes Islands and the Bounty Islands The Bounty Islan ...

'' (Odhner, 1924) * ''Micrelenchus caelatus bakeri'' Fleming, 1948: synonym of ''

Roseaplagis artizona ''Roseaplagis artizona'' is a species of sea snail in the family Trochidae, the top snails. Description The height of the shell attains 3.5 mm, its diameter 4 mm. The very small shell is subperforate or imperforate. It has a conical sh ...

'' A. Adams, 1853 (Odhner, N.H.J., 1924) * ''Micrelenchus caelatus elongatus'' (

Suter Suter is a surname. Notable people with the name include: * Alexis P. Suter (born 1963), American blues, and soul blues singer and songwriter * Andrew Burn Suter (1830–1895), Bishop of the Diocese of Nelson, New Zealand * August Suter (1887& ...

, 1897): synonym of ''Cantharidus caelatus elongatus'' (

, 1897); synonym of ''

'' A. Adams, 1853 * ''Micrelenchus caelatus morioria''

Powell Powell may refer to: People * Powell (surname) * Powell (given name) * Powell baronets, several baronetcies *Colonel Powell (disambiguation), several military officers *General Powell (disambiguation), several military leaders *Governor Powell (di ...

, 1933: synonym of ''Cantharidus caelatus mortenseni'' Powell, 1933; synonym of ''

'' (Odhner, 1924) * ''Micrelenchus caelatus mortenseni'' ( Odhner, 1924): synonym of ''

'' (Odhner, 1924)

References

F.W. Hutton, ''Revision of the recent rhipidoglossate and docoglossate Mollusca of New Zealand''; Proceedings of the Linnean Society of New South Wales, ser. 1 v. 9 (1884)
* Powell A. W. B., ''New Zealand Mollusca'', William Collins Publishers Ltd, Auckland, New Zealand 1979 * Marshall B.A. 1998. ''The New Zealand Recent species of Cantharidus Montfort, 1810 and Micrelenchus Finlay, 1926 (Mollusca: Gastropoda: Trochidae).'' Molluscan Research 19(1): 107-156 {{Taxonbar, from1=Q61697756, from2=Q406878 caelatus Gastropods of New Zealand Gastropods described in 1884