''Ranella'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of large warm-water and tropical
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 ...
s,
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 ...
mollusc
Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...
s 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 ...
Ranellidae
The Ranellidae, common name the triton shells or tritons, are a taxonomic family of small to very large predatory sea snails, marine gastropod mollusks in the order Littorinimorpha.
Distribution
The Tritons are principally equatorial in their ...
, the tritons.
Shell description
The shells of species within this genus are very large and solid, with a tall
spire
A spire is a tall, slender, pointed structure on top of a roof of a building or tower, especially at the summit of church steeples. A spire may have a square, circular, or polygonal plan, with a roughly conical or pyramidal shape. Spire ...
, a rounded
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 ...
, a broadly flanged outer lip, and a moderately long
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 i ...
, which is flexed and inclined to the left. The
varices
A varix (: varices) is an abnormally dilated blood vessel with a tortuous course. Varices usually occur in the venous system, but may also occur in arterial or lymphatic vessels.
Examples of varices include:
* Varicose veins, large tortuous veins ...
are prominent and rounded, but are hollowed out on the inside.
Species
Species within the genus ''Ranella'' include:
* ''
Ranella australasia
''Ranella australasia'' is a species of large predatory sea snail, a marine gastropod mollusk in the family Ranellidae, the triton snails, triton shells or tritons.
Distribution
THis species is endemic to Australia and occurs off New South Wa ...
''
(Perry, 1811)
* † ''
Ranella bellardii''
(Weinkauff, 1868)
* ''
Ranella gemmifera''
(Euthyme, 1889)
* †''
Ranella kaiparaensis''
(Finlay, 1924)
* ''
Ranella olearium
''Ranella olearium'', common name the wandering triton or the little frog triton or olive trumpet, is a species of large sea snail, a marine gastropod mollusc in the family Ranellidae, the tritons.Gofas, S. (2010). Ranella olearium (Linnaeus, 1 ...
''
Linnaeus, 1758
;Synonyms:
*''Ranella reticularis''
(Linnaeus, 1758) sensu Deshayes, 1839: synonym of ''Ranella olearium''
(Linnaeus, 1758)
References
* Lamarck J.B. (1816). Liste des objets représentés dans les planches de cette livraison. In: Tableau encyclopédique et méthodique des trois règnes de la Nature. Mollusques et Polypes divers. Agasse, Paris. 16 pp.
* Schumacher, C.F. 1817. Essai d'un Nouveau Systéme des Habitations des vers Testacés. Copenhagen : Schultz 287 pp., pls 1-22.
* Dall, W.H. 1904. A historical and systematic review of the frog-shells and tritons. Smithsonian Miscellaneous Collections 47: 114-144
* Iredale, T. 1917. More molluscan name-changes, generic and specific. Proceedings of the Malacological Society of London 12(6): 322-330
* Rolán E., 2005. Malacological Fauna From The Cape Verde Archipelago. Part 1, Polyplacophora and Gastropoda.
* Vaught, K.C.; Tucker Abbott, R.; Boss, K.J. (1989). A classification of the living Mollusca. American Malacologists: Melbourne. ISBN 0-915826-22-4. XII, 195 pp.
Further reading
* R. Tucker Abbott & S. Peter Dance, 1982, ''Compendium of Seashells'', Duttin,
New York
New York most commonly refers to:
* New York (state), a state in the northeastern United States
* New York City, the most populous city in the United States, located in the state of New York
New York may also refer to:
Places United Kingdom
* ...
External links
*
Schumacher, C. F. (1817). Essai d'un nouveau système des habitations des vers testacés. Schultz, Copenghagen. iv + 288 pp., 22 pls.Iredale, T. (1917). Molluscan name-changes, generic and specific. Proceedings of the Malacological Society of London. 12(6): 322-330Dall W.H. (1925). Illustrations of unfigured types of shells in the collections of the United States National Museum. Proceedings of the United States National Museum. 66, art. 17, no. 2554: 1-41, pls. 1-36Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Patrimoines Naturels. 50: 180-213''Ranella'' at Malacolog
Ranellidae
Gastropod genera
Taxa named by Jean-Baptiste Lamarck
Taxonomy articles created by Polbot
{{Ranellidae-stub