''Homalopoma tapparonei'' 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 ...
with
calcareous opercula, a
marine
Marine is an adjective meaning of or pertaining to the sea or ocean.
Marine or marines may refer to:
Ocean
* Maritime (disambiguation)
* Marine art
* Marine biology
* Marine debris
* Marine habitats
* Marine life
* Marine pollution
Military
* ...
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 Colloniidae
Colloniidae is a family of small sea snails with calcareous opercula, marine gastropod mollusks in the clade Vetigastropoda.MolluscaBase eds. (2020). MolluscaBase. Colloniidae Cossmann, 1917. Accessed through: World Register of Marine Species at ...
.
[Bouchet, P. (2012). ''Homalopoma tapparonei'' (Caramagna, 1888). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=701874 on 2013-02-10]
Description
The small, turbiniform shell grows to a height of 3 mm. It is very thick. The short
spire is obtuse. The
apex is mammillated. The shell contains four
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. The first two are smooth and very rapidly
increasing. The remainder are convex. They are ornamented with spiral ridges or cords. These ridges are costiform, rounded, regular, as wide as the interstices, and ornamented with blood-red spots. These spots are here and there interrupted, sometimes disposed in nearly regular series parallel with the axis, and more obscure on the posterior 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 ...
. The white interstices between the ridges are profound and sulciform. The body whorl is more produced than the spire, quite inflated. It is rounded at the periphery, depressed on the base and umbilicated. The
umbilicus is very narrow, white and
encircled by a white zone. The rounded
aperture is oblique and simple. The
peristome shows a light thickening. The shell is within white, or painted like the outside. The simple
suture is somewhat impressed.
Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
(described as ''Gibbula tapparonei'')
Distribution
This species occurs in the Red Sea and in the Gulf of Oman
The Gulf of Oman or Sea of Oman ( ar, خليج عمان ''khalīj ʿumān''; fa, دریای عمان ''daryâ-ye omân''), also known as Gulf of Makran or Sea of Makran ( ar, خلیج مکران ''khalīj makrān''; fa, دریای مکرا ...
.
References
External links
World Register of Marine Species
{{Taxonbar, from=Q13233717
Colloniidae
Gastropods described in 1888