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Demoulia Zbyszewskii
''Demoulia'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Nassariidae, the Nassa mud snails or dog whelks. Description The ovate-globose shell is covered with a downy epidermis. The Spire (mollusc), spire is short, conical with a papillary Apex (mollusc), apex. The Whorl (mollusc), whorls are depressed. The Aperture (mollusc), aperture is ovate. The inner Lip (gastropod), lip is thickened, with a ridge posteriorly. The outer lip is contracted, thickened externally and plicated internally. Species Species within the genus ''Demoulia'' include: * ''Demoulia abbreviata'' (Gmelin, 1791) * † ''Demoulia conglobata'' (Brocchi, 1814) * ''Demoulia nataliae'' Kilburn, 1972 * ''Demoulia obtusata'' (Link, 1807) * † ''Demoulia pupa'' (Brocchi, 1814) * ''Demoulia tryoni'' (Crosse, 1869) * ''Demoulia ventricosa'' (Lamarck, 1816) * † ''Demoulia zbyszewskii'' Landau, Marques da Silva & Gili, 2009 ; Species brought into synonymy : * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lip (gastropod)
In the shell of gastropod mollusks (a snail shell), the lip is the free margin of the peristome (synonym: peritreme) or aperture (mollusc), aperture (the opening) of the gastropod shell. In dextral (right-handed) shells (most snail shells are right-handed), the right side or outer side of the aperture is known as the outer lip (''labrum''). The left side of the aperture is known as the inner lip or columellar lip (''labium'') if there is a pronounced lip there. In those species where there is no pronounced lip, the part of the body whorl that adjoins the aperture is known as the parietal wall. The outer lip is usually thin and sharp in immature shells, and in some adults (e.g. the land snails ''Helicella'' and ''Bulimulus''). However, in some other land snails and in many marine species the outer lip is ''thickened'' (also called ''callused''), or ''reflected'' (turned outwards). In some other marine species it is curled inwards (''inflected''), as in the cowries such as ''Cypraea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demoulia Zbyszewskii
''Demoulia'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Nassariidae, the Nassa mud snails or dog whelks. Description The ovate-globose shell is covered with a downy epidermis. The Spire (mollusc), spire is short, conical with a papillary Apex (mollusc), apex. The Whorl (mollusc), whorls are depressed. The Aperture (mollusc), aperture is ovate. The inner Lip (gastropod), lip is thickened, with a ridge posteriorly. The outer lip is contracted, thickened externally and plicated internally. Species Species within the genus ''Demoulia'' include: * ''Demoulia abbreviata'' (Gmelin, 1791) * † ''Demoulia conglobata'' (Brocchi, 1814) * ''Demoulia nataliae'' Kilburn, 1972 * ''Demoulia obtusata'' (Link, 1807) * † ''Demoulia pupa'' (Brocchi, 1814) * ''Demoulia tryoni'' (Crosse, 1869) * ''Demoulia ventricosa'' (Lamarck, 1816) * † ''Demoulia zbyszewskii'' Landau, Marques da Silva & Gili, 2009 ; Species brought into synonymy : * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demoulia Ventricosa
''Demoulia ventricosa'', common name : the blunt demoulia, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.Gofas, S. (2015). Demoulia ventricosa. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=553033 on 2016-05-15 There is one subspecies: ''Demoulia ventricosa nataliae'' Kilburn, 1972 Description The shell size varies between 17 mm and 27 mm The ovate shell is slightly cylindrical and is blunted at its summit. The short spire is flattened. It is composed of five whorls. The two last whorls are much more swollen, and covered upon their whole surface with very fine and very close transverse striae. The suture is very apparent, and a little canaliculated. The white aperture is ovate, narrowed at its upper part and dilated inferiorly. The outer lip is thin and is ornamented interiorly with numerous transverse striae. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demoulia Tryoni
''Demoulia'' is a genus of sea snails, marine gastropod mollusks in the family Nassariidae, the Nassa mud snails or dog whelks. Description The ovate-globose shell is covered with a downy epidermis. The spire is short, conical with a papillary apex. The whorls are depressed. The aperture is ovate. The inner lip is thickened, with a ridge posteriorly. The outer lip is contracted, thickened externally and plicated internally. Species Species within the genus ''Demoulia'' include: * '' Demoulia abbreviata'' (Gmelin, 1791) * † '' Demoulia conglobata'' (Brocchi, 1814) * '' Demoulia nataliae'' Kilburn, 1972 * '' Demoulia obtusata'' (Link, 1807) * † '' Demoulia pupa'' (Brocchi, 1814) * '' Demoulia tryoni'' (Crosse, 1869) * '' Demoulia ventricosa'' (Lamarck, 1816) * † ''Demoulia zbyszewskii ''Demoulia'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Nassariidae, the Nassa mud snails or dog whelks. Description The ovate-gl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demoulia Obtusata
''Demoulia obtusata'', common name : the obtuse demoulia, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks. Description The shell size varies between 17 mm and 25 mm Distribution This species is distributed in European waters and in the Atlantic Ocean off West Africa, Gabon and Senegal Senegal, officially the Republic of Senegal, is the westernmost country in West Africa, situated on the Atlantic Ocean coastline. It borders Mauritania to Mauritania–Senegal border, the north, Mali to Mali–Senegal border, the east, Guinea t .... References * Cernohorsky W. O. (1984). ''Systematics of the family Nassariidae (Mollusca: Gastropoda).'' Bulletin of the Auckland Institute and Museum 14: 1–356. * Bernard, P.A. (Ed.) (1984). ''Coquillages du Gabon hells of Gabon'' Pierre A. Bernard: Libreville, Gabon. 140, 75 plates pp * Gofas, S.; Le Renard, J.; Bouchet, P. (2001). ''Mollusca, in: Costello, M.J. e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demoulia Nataliae
''Demoulia'' is a genus of sea snails, marine gastropod mollusks in the family Nassariidae, the Nassa mud snails or dog whelks. Description The ovate-globose shell is covered with a downy epidermis. The spire is short, conical with a papillary apex. The whorls are depressed. The aperture is ovate. The inner lip is thickened, with a ridge posteriorly. The outer lip is contracted, thickened externally and plicated internally. Species Species within the genus ''Demoulia'' include: * '' Demoulia abbreviata'' (Gmelin, 1791) * † '' Demoulia conglobata'' (Brocchi, 1814) * '' Demoulia nataliae'' Kilburn, 1972 * ''Demoulia obtusata'' (Link, 1807) * † ''Demoulia pupa'' (Brocchi, 1814) * ''Demoulia tryoni'' (Crosse, 1869) * ''Demoulia ventricosa'' (Lamarck, 1816) * † ''Demoulia zbyszewskii ''Demoulia'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Nassariidae, the Nassa mud snails or dog whelks. Description The ovate-globos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demoulia Conglobata
''Demoulia'' is a genus of sea snails, marine gastropod mollusks 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 ... Nassariidae, the Nassa mud snails or dog whelks. Description The ovate-globose shell is covered with a downy epidermis. The spire is short, conical with a papillary apex. The whorls are depressed. The aperture is ovate. The inner lip is thickened, with a ridge posteriorly. The outer lip is contracted, thickened externally and plicated internally. Species Species within the genus ''Demoulia'' include: * '' Demoulia abbreviata'' (Gmelin, 1791) * † '' Demoulia conglobata'' (Brocchi, 1814) * '' Demoulia nataliae'' Kilburn, 1972 * '' Demoulia obtusata'' (Link, 1807) * † '' Demoulia pupa'' (Brocchi, 1814) * '' Demoulia tryoni'' (Crosse, 1869) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demoulia Abbreviata
''Demoulia abbreviata'', common name : the obtuse demoulia, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.Gofas, S. (2015). Demoulia abbreviata. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=553036 on 15 May 2016 Description The shell size varies between 20 mm and 36 mm The ovate, ventricose shell is of a whitish or chestnut color, marked sometimes with deeper spots. The suture is deep and canaliculated, the exterior edge of which is slightly rounded and surrounded by a white band, alternated with fawn-colored blotches. The scaffolded spire is formed of six or seven nearly flat whorls. The body whorl, on the contrary, is very convex, and larger than all the others united. Upon the surface of this shell, are seen equal, raised striae. The white aperture is subrotund, narrowed at the upper part and dilated inferior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aperture (mollusc)
The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where the head-foot part of the body of the animal emerges for locomotion, feeding, etc. The term ''aperture'' is used for the main opening in gastropod shells, scaphopod shells, and also for ''Nautilus'' and ammonite shells. The word is not used to describe bivalve shells, where a natural opening between the two shell valves in the closed position is usually called a ''gape (bivalve), gape''. Scaphopod shells are tubular, and thus they have two openings: a main anterior aperture and a smaller posterior aperture. As well as the aperture, some gastropod shells have additional openings in their shells for respiration; this is the case in some Fissurellidae (keyhole limpets) where the central smaller opening at the apex (mollusc), apex of the shell is called an orifice, and in the Haliotidae (abalone) where the row of respiratory openings in the shell are also called orifices. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 distinguished from snails primarily by the absence of a visible Gastropod shell, shell. Definition Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain Neritidae, neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example, species in the genus ''Truncatella (gastropod), Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large and diverse group of animals. Most snails that live in salt water respire using a gill or gills; a few species, though, have a lung, are intertidal, and are active only at low tide w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
