Broderipia Rosea
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''Broderipia rosea'' is a
species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
of
sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...
, a marine
gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...
mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000  extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...
in the
family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Trochidae The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles ...
, the top snails.


Description

The height of the shell attains 4⅓ mm, its diameter 2½ mm. The shell is limpet-like, but with a recurved beak projecting beyond the posterior outline of the
aperture In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...
. The shell is very convex, sloping convexly toward the front margin. The surface of the shell is lusterless, showing under a lens rather rude concentric growth lines, and very numerous, close, fine striae, radiating from the
apex The apex is the highest point of something. The word may also refer to: Arts and media Fictional entities * Apex (comics) A-Bomb Abomination Absorbing Man Abraxas Abyss Abyss is the name of two characters appearing in Ameri ...
to the margins. The coloration consists of narrow red stripes obliquely descending from the median line to the borders, forming a series of V-shaped markings. The beak is rolled forward and a trifle inclined laterally, but the (dextral) apical
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). In nature File:Photograph and axial plane floral diagra ...
is lost. The aperture is oval. Its posterior margin is scarcely expanded. Its cavity is deep, scarcely perceptibly and nacreous.G.W. Tryon (1890) Manual of Conchology XII; Academy of natural Sciences, Philadelphia, 1890
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Distribution

This species occurs in the
Red Sea The Red Sea is a sea inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab-el-Mandeb Strait and the Gulf of Aden. To its north lie the Sinai Peninsula, the Gulf of Aqaba, and th ...
, the Indian Ocean and in the Pacific Ocean; off the
Cocos Keeling Islands The Cocos (Keeling) Islands (), officially the Territory of Cocos (Keeling) Islands (; ), are an Australian external territory in the Indian Ocean, comprising a small archipelago approximately midway between Australia and Sri Lanka and rel ...
; off
Sri Lanka Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, also known historically as Ceylon, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, separated from the Indian subcontinent, ...


References

* Broderip, W.J. 1834. ''Description of a new genus of Gastropoda (Scutella''). Proceedings of the Zoological Society of London 1834(2): 47–49 * Cernohorsky, W.O. 1978. ''Tropical Pacific marine she''lls. Sydney : Pacific Publications 352 pp., 68 pls. * Maes, V.O. 1967. ''The littoral marine mollusks of Cocos-Keeling Islands (Indian Ocean''). Proceedings of the Academy of Natural Sciences, Philadelphia 119: 93–217 {{DEFAULTSORT:Broderipia Rosea rosea Gastropods described in 1834