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Gymnobela
''Gymnobela'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. This genus can sometimes be hardly differentiated from species in the genera ''Spergo'' Dall, 1895, ''Theta'' Clarke, 1959 and ''Speoides yoshidae'' Kuroda & Habe in Habe, 1961 (a synonym of ''Gymnobela yoshidae'' (Kuroda & Habe, 1961) ) This genus is highly diverse. It is rather an artificial assemblage of several unrelated genus-level lineages that are unrelated and mostly undescribed. Description The rather solid shell is in form and general appearance like Bela. The spire is generally rather short. The body whorl is swollen. The whorls are often shouldered. The sculpture is rather strong. The protoconch has a fine cancellated sculpture. The subsutural band is not strongly marked. The posterior notch of the lip is shallow and usually not very distinct. The operculum is absent. Fossils have been found in Pliocene strata of Panama and Quaternary strata of Costa Rica (age rang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Blakeana
''Gymnobela blakeana'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Subspecies: ''Gymnobela blakeana agria'' (Dall, 1889) (synonym: ''Pleurotomella (Gymnobela) blakeana agria'' Dall, 1889) Description (Original description) The shell is very variable in proportions and somewhat variable in sculpture. It is thin, white, with a dark protoconch, a rather acute spire, a short columella and rather wide aperture . The sculpture consists of revolving threads, two stronger ones immediately in front of the suture, which are nodulated at their intersection with the ribs with sixteen to eighteen transverse ribs which are strongest near the suture and fade away toward the siphonal canal. The notch is subobsolete. The shell shows the waxy polish characteristic of so many abyssal forms. Distribution ''G. blakeana'' can be found in Atlantic and Caribbean waters, ranging from the coast of Massachusetts Massachusetts (Massachusett: ''Muhsachuwees ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Aquilarum
''Gymnobela aquilarum'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 16 mm, its diameter 9.5 mm. The small, short shell has a fusiform, or subovate shape, with a low spire and very large body whorl, forming about three-fourths the total length. The surface is finely decussated by longitudinal and spiral lines of nearly equal size. There are four whorls below the protoconch, very rapidly increasing, strongly convex, but frequently slightly flattened at the periphery, and sometimes distinctly angulated at the shoulder, but more commonly evenly rounded. The body whorl is very ventricose. The suture is strongly impressed, often slightly channelled. The protoconch consists of two or three small, light chestnut-brown whorls, with very finely cancellated sculpture. The apical whorl is very small and regularly coiled. The sculpture on the rest of the shell consists of numerous, rather fine, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Agassizii
''Gymnobela agassizii'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Subspecies: ''Gymnobela agassizii mexicana'' (Dall, 1889) (synonym: ''Pleurotomella agassizii mexicana'' Dall, 1889) Description The length of the shell attains 47 mm, its diameter 14 mm. The shell is large and handsomely sculptured. It contains eight convex whorls, shouldered, with about sixteen thick, rounded, oblique ribs, separated by concave interspaces. The ribs do not extend above the shoulder, leaving a rather broad flattened band, which is covered by raised revolving lines, more or less decussated by prominent growth lines and slight riblets, running down the suture. The revolving lines become stronger and more elevated below the shoulder, and cross the ribs as well as their intervals. Towards the siphonal canal the ribs fade out and the revolving lines become still more prominent. The outer lip has a wide and rather deep rounded notch below the suture. Below t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Abyssorum
''Gymnobela abyssorum'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description A biconical shell up to 23mm high with 6–7 shouldered whorls. Its diameter is 10 mm. Buff in colour with brownish marks. Description. – Shell of medium size, of a slightly ovoid elongated curve, a little more developed above than below. The obtuse spire is of mediocre length. It is composed of 8 to 9 whorls growing slowly in diameter and in height. They show a slightly concave-oblique profile on almost half of the height (more than half in the upper whorls, and less than half on the penultimate whorl). Then they become almost upright or slightly convex, with a keel sensitive to the change of direction of the whorls. The body whorl measures almost two-thirds of the total length. It is a slightly concave at the top. In lateral profile, on the opposite side to the outer lip, it becomes convex, then suddenly attenuated at the base. It ends in an open wid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Augusta
''Gymnobela augusta'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description Distribution This marine species occurs off the Agulhas Bank The Agulhas Bank (, from Portuguese for Cape Agulhas, ''Cabo das Agulhas'', "Cape of Needles") is a broad, shallow part of the southern African continental shelf which extends up to south of Cape Agulhas before falling steeply to the abyssal p ..., South Africa References External links Thiele J., 1925. Gastropoden der Deutschen Tiefsee-Expedition. In:. Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898–1899 II. Teil, vol. 17, No. 2, Gustav Fischer, Berlin* Endemic fauna of South Africa augusta Gastropods described in 1925 {{Gymnobela-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Atypha
''Gymnobela atypha'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase (2019). MolluscaBase. Gymnobela atypha (Bush, 1893). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=532893 on 2019-04-25 Description The length of the shell attains 36 mm, its diameter 12 mm. (Original description) The rather large shell is solid, somewhat translucent, bluish white, with a comparatively smooth surface and little lustre. The spire is unusually high, consisting of nine angularly shouldered whorls below the small, very acute, chestnut-brown protoconch. The aperture is short and broad. The posterior sinus is as broad as the subsutural band and rather shallow. The outer lip is considerably inflated, curving gradually toward the columella without forming a decided siphonal canal. The columella is nearly straight, curved slightly anteriorly, with a narrow, closely adhering strip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Engonia
''Gymnobela engonia'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 17 mm, its diameter 3.5 mm. (Original description) The somewhat solid, white, more or less translucent shell has a stout-fusiform shape. The aperture is about equal in length to the spire, which is shouldered, decidedly turreted, and tapered regularly to an acute apex. The shell contains five whorls below the protoconch, strongly angularly shouldered at about the middle, the portion above the shoulder forming a wide, abruptly sloping subsutural band, which is usually slightly concave in the middle, but swells a little where it joins the suture. The whorls are flattened below the shoulder and a little narrowed at the suture, which is strongly impressed. The sculpture on the subsutural band consists of numerous, close, revolving lines, most distinct towards the shoulder, and of small, slightly raised, thin riblets, which are most d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Africana
''Gymnobela africana'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 54.7 mm, its diameter 22.7 mm. Distribution This marine species occurs off Kenya ) , national_anthem = " Ee Mungu Nguvu Yetu"() , image_map = , map_caption = , image_map2 = , capital = Nairobi , coordinates = , largest_city = Nairobi .... References Further reading Sysoev, A.V. (1996b) ''Deep-sea conoidean gastropods collected by the John Murray Expedition, 1933–34''. Bulletin of the Natural History Museum of London, Zoology, 62, 1–30 External links * africana Gastropods described in 1996 {{Gymnobela-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Bairdii
''Gymnobela bairdii'', common name Baird's turrid, is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell varies between 10 mm and 55 mm. (Original description) The large, rather stout shell has a fusiform shape. It shows an elevated, acute, turreted spire and eight or nine obtusely shouldered, angular whorls. The body whorl is large and somewhat inflated, with a broad, flattened or a slightly concave, sloping subsutural band, which is covered with distinct, strongly receding lines of growth and with more or less evident, raised, spiral cinguli and grooves. Below the subsutural band the whorls are obtusely angulated, but without a distinct carina. Commencing at the shoulder and extending a short distance below it are numerous oblique, not very elevated, longitudinal ribs, which fade out before reaching the middle of the whorls. The whole surface of the whorls, including the ribs, is covered with conspicuous, rais ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Angulosa
''Gymnobela angulosa'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description Distribution This bathyal marine species was found in the Bougainville Trench, New Guinea New Guinea (; Hiri Motu: ''Niu Gini''; id, Papua, or , historically ) is the world's second-largest island with an area of . Located in Oceania in the southwestern Pacific Ocean, the island is separated from Australia by the wide Torr ... References * Sysoev, AV. "Ultra-abyssal Findings of Mollusks of the Family Turridae (Gastropoda, Toxoglossa) in the Pacific Ocean" Zoologichesky Zhurnal 67.8 (1988): p. 1122 External links * angulosa Gastropods described in 1988 {{Gymnobela-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Baruna
''Gymnobela baruna'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell attains 36.2 mm, its diameter 12.8 mm. Distribution This marine species occurs off East Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine .... References * External links MNHN, Paris: holotype* baruna Gastropods described in 1997 {{Gymnobela-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnobela Altispira
''Gymnobela altispira'' 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 .... Description Distribution This marine species was found on the Naska Ridge, Southeast Pacific References * Sysoev, A. V., and D. L. Ivanov. "Nex Taxa of the Family Turridae (Gastropoda, Toxoglossa) from the Naska-ridge (Southeast Pacific)." Zoologichesky Zhurnal 64.2 (1985): 194-205. External links * altispira Gastropods described in 1985 {{Gymnobela-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |