''Clelandella dautzenbergi'' 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 Trochidae, the top snails.
Description
The size of the shell varies between 9 mm and 15 mm, with a tiny
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 ...
of less than one
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 ...
and a
teleoconch up to 7-8 whorls. The
sculpture on the
spire whorls consists of beaded spiral cords as wide as interspaces; one cord running just above the
suture and continued on the peripheral angle 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 ...
is a duplicate with adapical component strongly beaded and abapical one less so. The abapical surface is imperforate, slightly convex and bearing 6-10 spiral cords, as wide as interspaces and not beaded. The shell colour varies from whitish to yellowish, with nacre showing through in some cases, broad brown flames starting from the suture on the early spire whorls; later whorls usually contain cords and a peripheral rim white articulated by white and brown streaks. The abapical cords also articulated by smaller white and brown flecks.
Distribution
This species occurs in the
Mediterranean Sea and in the Atlantic Ocean off
West Africa,
Norway and
Iceland.
References
External links
*
{{DEFAULTSORT:Clelandella Dautzenbergi
dautzenbergi
Gastropods described in 2005