|
Thatcheria
''Thatcheria'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description (Original description) The solid shell is angularly pyriform. The spire is prominent, shorter than the aperture. It is many-whorled with whorls flattened above, strongly keeled at the periphery and contracted below. The aperture shows a broad incurved sinus between the extremity of the last keel and the junction of the body whorl. The 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 is ... is wide and open. The columella is smooth. The outer lip is simple below the sinus. Species Species within the genus ''Thatcheria'' include: * † '' Thatcheria circumfossa'' (Koenen, 1872) * '' Thatcheria janae'' Lorenz & Stahlschmidt, 2019 * † '' Thatcheria liratula'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thatcheria Janae
''Thatcheria janae'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". ''Malacologia'' 47(1-2). . 39 ....MolluscaBase eds. (2020). MolluscaBase. Thatcheria janae Lorenz & Stahlschmidt, 2019. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1380227 on 2020-04-06 Description The length of the shell attains 67 mm. Distribution This marine species occurs off Western Australia. References * Lorenz F. & Stahlschmidt P. (2019). ''An overlooked second species of Thatcheria from Western Australia (Gastropoda: Conoidea: Raphitomidae)''. Conchylia. 50(1-4): 55–62. External links Gastropods.com: ''Thatcheria janae'' janae Gastropods described in 2019 Gastropods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thatcheria Mirabilis
''Thatcheria mirabilis'', common name the Japanese wonder shell or Miraculous thatcheria is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell varies between 70 mm and 120 mm. (Original description) The solid shell is angularly pyriform and yellowish white. The spire is elevated and acuminate towards the apex. It contains 8 whorls, flattened, and slightly excavated above, strongly and prominently keeled at the periphery, and sloping inwards below. Above the keels they are finely arcuately striate, below irregularly more or less crenately concentrically ridged. The aperture is triangularly subquadrate, pure white, and shining within. The white columella is smooth, slightly arcuate above, nearly straight below. The outer lip shows a broad excavated sinus extending from its juncture with the body whorl to the extremity of the last keel. Below the keel, which is very prominent, the lip is simple and arcuate. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thatcheria Waitaraensis
''Thatcheria waitaraensis'' is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". ''Malacologia'' 47(1-2). . 39 ....MolluscaBase eds. (2020). MolluscaBase. Thatcheria waitaraensis (Marwick, 1926) †. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=831744 on 2020-04-07 Description Distribution Fossils of this marine species were found in Upper Miocene strata in New Zealand References * Marwick, J. (1926). ''New Tertiary Mollusca from North Taranaki.'' Transactions of the New Zealand Institute. 56: 317–331. * Maxwell, P.A. (2009). ''Cenozoic Mollusca.'' pp 232–254 in Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thatcheria Pagodula
''Thatcheria pagodula'' is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase eds. (2020). MolluscaBase. Thatcheria pagodula (Powell, 1942) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=831743 on 2020-04-07 Description Distribution Fossils of this marine species were found in Upper Miocene and Lower Pliocene strata in New Zealand References * Powell, A. W. B. 1942. ''The New Zealand Recent and fossil Mollusca of the family Turridae, with general notes on Turrid nomenclature and systematics.'' Bull. Auckland Inst., 2 : 1–188, pis. 1–14. * Maxwell, P.A. (2009). ''Cenozoic Mollusca.'' pp 232–254 in Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch External links A.J. Charig, The Gastropod Genus Thatcheria and its Relationships; Bull ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thatcheria Liratula
''Thatcheria liratula'' is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase eds. (2020). MolluscaBase. Thatcheria liratula (Powell, 1942) †. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=831742 on 2020-04-07 Description Distribution Fossils of this marine species were found in Lower Pliocene Lower may refer to: *Lower (surname) *Lower Township, New Jersey *Lower Receiver (firearms) *Lower Wick Gloucestershire, England See also *Nizhny Nizhny (russian: Ни́жний; masculine), Nizhnyaya (; feminine), or Nizhneye (russian: Ни́� ... strata in New Zealand References * Powell, A. W. B. 1942. ''The New Zealand Recent and fossil Mollusca of the family Turridae, with general notes on Turrid nomenclature and systematics.'' Bull. Auckland Inst., 2 : 1–188, pis. 1–14. * Maxwell, P.A. (2009). ''Cenozoic Mollusca.'' pp 232–254 in Gordon, D.P. (ed.) New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raphitomidae
Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". '' Malacologia'' 47(1-2). . 397 pp. Bouchet, Kantor ''et al''. elevated in 2011 the subfamily Raphitominae (which at that point had been placed in the family Conidae) to the rank of family. This was based on a cladistical analysis of shell morphology, radular characteristics, anatomical characters, and a dataset of molecular sequences of three gene fragments. The family was found to be monophyletic. Description The Raphitomidae is the largest, most diverse and most variable taxon in the Conoidea, with the greatest number of species and the largest ecological range (from the tropics to the pole) and largest vertical range ( intertidal to hadal depths). The shells of species in the Raphitomidae are very variable in shape (buccinoid to ovate, elongate-fusiform, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columella (gastropod)
The columella (meaning "little column") or (in older texts) pillar is a central anatomical feature of a coiled snail shell, a gastropod shell. The columella is often only clearly visible as a structure when the shell is broken, sliced in half vertically, or viewed as an X-ray image. The columella runs from the apex of the shell to the midpoint of the undersurface of the shell, or the tip of the siphonal canal in those shells which have a siphonal canal. If a snail shell is visualized as a cone of shelly material which is wrapped around a central axis, then the columella more or less coincides spatially with the central axis of the shell. In the case of shells that have an umbilicus, the columella is a hollow structure. The columella of some groups of gastropod shells can have a number of plications or folds (the columellar fold, plaits or plicae), which are usually visible when looking to the inner lip into the aperture of the shell. These folds can be wide or narrow, promine ... [...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 (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''. It can also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George French Angas
George French Angas (25 April 1822 – 4 October 1886), also known as G.F.A., was an English explorer, naturalist, painter and poet who emigrated to Australia. His paintings are held in a number of important Australian public art collections. He was the eldest son of George Fife Angas, who was prominent in the early days of the colonisation of South Australia. Biography He was born in Newcastle upon Tyne, England, the eldest son of George Fife Angas, prominent in the establishment of the new colony of South Australia. Despite showing remarkable talent in drawing, he was placed in a London business house by his father. He left on a tour of Europe and in 1842 published his first book, ''"Rambles in Malta and Sicily"''. As a result of this experience, he turned his back on the world of commerce, and directed his training towards a study of natural history, anatomical drawing and lithography. Embarking on his travels, he was soon to find his acquired skills extremely useful. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 is drawn into the mantle cavity and over the gill and which serves as a chemoreceptor to locate food. Siphonal canals allow for active transport of water to sensory organs inside the shell. Organisms without siphonal canals in their shells rely on passive or diffuse transport or water into their shell. Those with siphonal canals have a direct inhalant stream of water that interacts with sensory organs to detect concentration and direction of a stimulus, such as food or mates. In certain groups of carnivorous snails, where the siphon is particularly long, the structure of the shell has been modified in order to house and protect the soft structure of the siphon. Thus the siphonal canal is a semi-tubular extension of the aperture of the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Siphonal Canal")