''Cypraeovula fuscorubra'' is a
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
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
cowry, 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 ...
mollusc
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...
in the
family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...
Cypraeidae, the cowries.
Subspecies
*''Cypraeovula fuscorubra fuscorubra''
(Shaw, 1909)
*''Cypraeovula fuscorubra gondwanalandensis''
(Burgess, 1970)
Description
The mantle is variable in colour from white to black and orange to pink and red, with a finely granular surface. There are small papillae along the mantle edges and there may be black and white markings. The siphon is short and recurved and is usually transparent white with an opaque white rim. Cephalic tentacles are tapered and fairly thick and yellow to orange in colour. The foot is short and fleshy and is usually less strongly pigmented than the mantle and is often marked with small black and white dots or flecks.
The shell is generally pear-shaped, and the colour ranges from beige and mauve to grey with an overlay of densely spaced reddish brown spots, which may be interrupted on the right side by a mantle line. Base and margins are thickened and usually beige or brown, but may be purple when fresh. Labrum is broad with a matte finish and 17 to 18 pigmented denticles. The aperture is fairly narrow but widens towards the front and curves to the rear.
Distribution
This marine species occurs off
South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...
from
Dassen Island to
Cape Agulhas.
[Liltved, William Rune. ''Cowries and their relatives of southern Africa: A study of the southern African Cypraeacean and Velutinacean gastropod fauna'', Gordon Verhoef, Seacomber Publications, 2000. ]
Natural history
The cowrie is found on reefs from 15 to over 80 metres depth, often on the sides of large granite boulders and feeds primarily on
demosponge
Demosponges (Demospongiae) are the most diverse class in the phylum Porifera. They include 76.2% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database). They are sponges with a soft body that covers a har ...
s, but also algal and bryozoan material.
References
* Kilburn, R.N. & Rippey, E. (1982) ''Sea Shells of Southern Africa''. Macmillan South Africa, Johannesburg, xi + 249 pp.
* Lorenz & Hubert (2000). ''A guide to worldwide cowries''. ConchBooks 1-584page(s): 62
fuscorubra
Gastropods described in 1909
{{Cypraeidae-stub