''Guraleus halmahericus'' 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 Mangeliidae.Marshall, B. (2015). Guraleus halmahericus (Schepman, 1913). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=433936 on 2017-07-11

Description

The length of the shell attains 7.5 mm, its width 3 mm. (Original description) The fusiform, pellucid, white shell has a rather short

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 ...

. It contains about 8

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 about 3 form 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 ...

, which is large, convexly-whorled, at first smooth and then axially ribbed;. The teleoconch whorls are angular and concave above. The sculpture consists of rather narrow axial ribs, about 12 or 13 on

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 ...

, crossed by spirals, of which one more or less strong one, just below the suture, another at the angle and one or two on the lower part. The body whorl with siphonal canal, with about 12 spirals, those on the upper whorls and 5 upper ones on body whorl are sharply tubercled in passing the ribs, those on the contracted part of body whorl and siphonal canal are more plain. Moreover, the whole shell is covered with fine growth lines. The aperture s elongately oval, angular above, with a rather short, wide siphonal canal below. The peristome is thin, with a moderately deep sinus above. The columellar margin is slightly concave above and is directed to the left below.Schepman, 1913. The prosobranchia of the Siboga expedition. Part IV -V - VI: Toxoglossa

Distribution

This marine species is endemic to Indonesia and can be found in the Halmahera Sea.

References

External links

Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1–1295.
* {{DEFAULTSORT:Guraleus Halmahericus halmahericus Gastropods described in 1913