|
Gemmula Gemmulina 002
''Gemmula'', common name the gem turrids, is a genus of sea snails, marine gastropod mollusks in the family Turridae, the turrids. These snails have been recorded as fossils from the Paleocene to the Quaternary (from 66.043 to 0.012 Ma). Fossils have been found all over the world. This genus is still regarded as paraphyletic and should be revised. A high number of undescribed species are estimated to belong to ''Gemmula''. Since independent “Gemmula-like” lineages are distributed all over the turrid tree, a revision of ''Gemmula'' would entail again a complete revision of the family Turridae. They are venomous with disulfide-rich polypeptides in their venom ducts. These bioactive peptides are likely to become a resource for novel pharmacologically active compounds Habitat and feeding habits The snails in this genus occur mostly in deeper tropical waters at depths between 50 and 500m. Because of these deep habitats, little is known about their feeding habits. Taxonomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmula Gemmulina
''Gemmula gemmulina'' is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids. Description The length of the shell varies between 11.1 mm and 24.8 mm. Distribution This marine species occurs off Western Sumatra, Indonesia; off the Philippines and in the South China Sea The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil .... References * Powell, A.W.B. (1964) The family Turridae in the Indo-Pacific. Part 1. The subfamily Turrinae. Indo-Pacific Mollusca, 1, 227–346 * Li B. aoquan& Li X. inzheng (2008). Report on the turrid genera Gemmula, Lophiotoma and Ptychosyrinx (Gastropoda: Turridae: Turrinae) from the China seas. Zootaxa. 1778: 1-25. * Liu, J.Y. uiyu(ed.). (2008). Checklist of marine biota of China seas. China Science Press. 1267 pp. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lophiotoma
''Lophiotoma'' is a genus of sea snails, marine gastropod mollusks in the family Turridae, the turrids. Fossils of this genus have been found in many places in the Indo-Pacific, but also going as far back as 61.7 Ma in paleocene strata of Alabama, USA. Original description Although having the small smooth embryo of a single whorl, polished surface and obsolete lines of growth, characterizing ''Pleurotoma'' (now ''Turris''), this genus may be recognized at once by the relatively shorter and stouter form as a rule, less elongate and straighter beak, which is strongly tapering in certain large forms like line ''unedo'', finer, more acutely elevated and less close-set spiral carinae, with a usually distinct and even, finely lineolate concavity from the peripheral carina to the suture or subsutural collar, the latter being generally present and by the deep anal sinus formed centrally on, and not behind, the peripheral carina, the latter being more strongly elevated and usually subdu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmula Bearrizensis
''Gemmula bearrizensis'' is an extinct species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.MolluscaBase eds. (2021). MolluscaBase. Gemmula bearrizensis Pacaud, 2021 †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1478552 on 2021-01-25 Description Distribution Fossils of this marine species have been found in Paleogene strata near Biarritz Biarritz ( , , , ; Basque also ; oc, Biàrritz ) is a city on the Bay of Biscay, on the Atlantic coast in the Pyrénées-Atlantiques department in the French Basque Country in southwestern France. It is located from the border with Sp ..., France. References * Boussac J. (1911). ''Études stratigraphiques et paléontologiques sur le Nummulitique de Biarritz''. Annales Hébert. 5: 1-96, pls 1-24. * Pacaud J.M. (2021). ''Remarques taxonomiques et nomenclaturales sur les mollusques gastéropodes du Paléogène de France et descr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmula Antedenticulata
''Gemmula antedenticulata'' is an extinct species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.MolluscaBase eds. (2021). MolluscaBase. Gemmula antedenticulata Lozouet, 2017 †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1056717 on 2021-01-25 Description Distribution Fossils of this marine species have been found in Oligocene strata in Aquitaine Aquitaine ( , , ; oc, Aquitània ; eu, Akitania; Poitevin-Saintongeais: ''Aguiéne''), archaic Guyenne or Guienne ( oc, Guiana), is a historical region of southwestern France and a former administrative region of the country. Since 1 Januar ..., France. References * Lozouet P. (2017). Les Conoidea de l'Oligocène supérieur (Chattien) du bassin de l'Adour (Sud-Ouest de la France). Cossmanniana. 19: 3–180. antedenticulata Gastropods described in 2017 {{paleo-Turridae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmula Ambara
''Gemmula ambara'' is a species of sea snail, a marine gastropod mollusc in the family Turridae, the turrids. Description The length of the shell varies between 30 mm and 60 mm. Distribution This marine species occurs off the Philippines; Guadalcanal; Chilwei Island, East China Sea. References External links Baldomero M. Olivera, David R. Hillyard and Maren Watkins, ''A new species of Gemmula, Weinkauff 1875; Evidence of two clades of Philippine species in the genus Gemmula'', Philippine Science letters, vol. 1 (1)Gastropods.com: Gemmula (Gemmula) ambara ambara ''Ambara'' ( kan, ಅಂಬರ) () is a 2013 Indian Kannada-language romance film written and directed by Sen Prakash. The film stars Yogesh and Bhama in the lead roles. The film was released on 15 November 2013. Cast *Yogesh as Ajay * Bhama ... Gastropods described in 2008 {{turridae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmula Amabilis
''Gemmula amabilis'' is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids. Description The length of the shell attains 40 mm. The pale yellowish-brown, fusiform shell is rather solid. It is spirally girdled with sutures sculpted with incremental striae. The first cingulum (the spiral ornamentation) is distinctly nodose. The carina (the keel-like structure) is produced, covered with white nodules. The conical spire has an acute apex and shows eleven carinated whorls. The evanescent suture is oblique; the last one is convex. The siphonal canal is narrow and long. The aperture is pear-shaped. It is marginally and internally ribbed. The outer lip is produced below. Distribution This species occurs in the Red Sea and the Gulf of Aden The Gulf of Aden ( ar, خليج عدن, so, Gacanka Cadmeed 𐒅𐒖𐒐𐒕𐒌 𐒋𐒖𐒆𐒗𐒒) is a deepwater gulf of the Indian Ocean between Yemen to the north, the Arabian Sea to the east, Djibout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmula Alwyni
''Gemmula alwyni'' is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids. Description The length of the shell attains 81.8 mm, its diameter 29.7 mm. Distribution This marine species occurs off KwaZulu-Natal, north to the Mozambique Channel The Mozambique Channel (french: Canal du Mozambique, mg, Lakandranon'i Mozambika, pt, Canal de Moçambique) is an arm of the Indian Ocean located between the Southeast African countries of Madagascar and Mozambique. The channel is about long ..., South Africa. References External links Kilburn, R.N. (2005). New species of Drilliidae and Turridae from southern Africa (Mollusca: Gastropoda: Conoidea). African Invertebrates. 46: 85-92 alwyni Gastropods described in 2005 {{turridae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmula Albina
''Gemmula albina'' is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.MolluscaBase eds. (2020). MolluscaBase. Gemmula albina (Lamarck, 1822). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1005410 on 2021-01-16 Description The keel-rib is flattened, bearing a row of equidistant, somewhat quadrangular brown spots. The rest of the surface is very minutely and numerously punctate with brown. The conspicuous painting on the slit-band, contrasted with the very minute sprinkling of brown dots elsewhere, is the distinguishing characteristic of this species. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus. The radula is unique to the molluscs, and is found in every class of mollusc except the bivalves, which instead use cilia, waving filaments that bring minute organisms to the mouth. Within the gastropods, the radula is used in feeding by both herbivorous and carnivorous snails and slugs. The arrangement of teeth ( denticles) on the radular ribbon varies considerably from one group to another. In most of the more ancient lineages of gastropods, the radula is used to graze, by scraping diatoms and other microscopic algae off rock surfaces and other substrates. Predatory marine snails such as the Naticidae use the radula plus an acidic secretion to bore through the shell of other molluscs. Other predatory marine sn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sculpture (mollusc)
Sculpture is a feature of many of the shells of mollusks. It is three-dimensional ornamentation on the outer surface of the shell, as distinct from either the basic shape of the shell itself or the pattern of colouration, if any. Sculpture is a feature found in the shells of gastropods, bivalves, and scaphopods. The word "sculpture" is also applied to surface features of the aptychus of ammonites, and to the outer surface of some calcareous opercula of marine gastropods such as some species in the family Trochidae. Sculpture can be concave or convex, incised into the surface or raised from it. Sometimes the sculpture has microscopic detailing. The term "sculpture" refers only to the calcareous outer layer of shell, and does not include the proteinaceous periostracum, which is in some cases textured even when the underlying shell surface is smooth. In many taxa, there is no sculpture on the shell surface at all, apart from the presence of fine growth lines. The sc ... [...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] |
Protoconch
A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called "nucleus". The protoconch may sometimes consist of several whorls, but when this is the case, the whorls show no growth lines. The whorls of the adult shell, which are formed after the protoconch, are known as the teleoconch. The teleoconch starts forming when the larval gastropod becomes a juvenile, and the protoconch may dissolve. Quite often there is a visible line of demarcation where the protoconch ends and the teleoconch begins, and there may be a noticeable change in sculpture, or a sudden appearance of sculpture at that point. In some gastropod groups (such as the Architectonicidae), the teleoconch whorls spiral in the opposite direction to the protoconch. In those cases, the shell is called heterostrophic. In species whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Siphonal Canal")
