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Pleurotomaria
''Pleurotomaria'' is an extinct genus of sea snails, marine gastropod molluscs in the family Pleurotomariidae. Species With current taxonomic changes the genus ''Pleurotomaria'' has been reserved exclusively for fossil species (denoted with † below). Known fossil species of ''Pleurotomaria'' include: * † ''Pleurotomaria agarista'' Billings, 1865 * † ''Pleurotomaria anglica'' (Sowerby, 1818) (synonym: ''Trochus anglicus'') * † ''Pleurotomaria angulosa'' d'Orbigny, 1842 * † ''Pleurotomaria antitorquata'' Münster, 1840 * † ''Pleurotomaria arctica'' Toula, 1875 * † ''Pleurotomaria arenaria'' Girty, 1908 * † ''Pleurotomaria awakinoensis'' Begg and Grant-Mackie, 2003 * † ''Pleurotomaria barrealensis'' (Cowper Reed, 1927) (synonym: ''Neoplatyteichum barrealensis'') * † ''Pleurotomaria bicoronata'' Sandberger and Sandberger, 1855 * † ''Pleurotomaria biondii'' Gemmellaro, 1889 * † ''Pleurotomaria bodana'' Roemer, 1855 * † ''Pleurotomaria brennensis'' Reed, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurotomaria Spilsbyensis
''Pleurotomaria'' is an extinct genus of sea snails, marine gastropod molluscs in the family Pleurotomariidae. Species With current taxonomic changes the genus ''Pleurotomaria'' has been reserved exclusively for fossil species (denoted with † below). Known fossil species of ''Pleurotomaria'' include: * † ''Pleurotomaria agarista'' Billings, 1865 * † ''Pleurotomaria anglica'' (Sowerby, 1818) (synonym: ''Trochus anglicus'') * † ''Pleurotomaria angulosa'' d'Orbigny, 1842 * † ''Pleurotomaria antitorquata'' Münster, 1840 * † ''Pleurotomaria arctica'' Toula, 1875 * † ''Pleurotomaria arenaria'' Girty, 1908 * † ''Pleurotomaria awakinoensis'' Begg and Grant-Mackie, 2003 * † ''Pleurotomaria barrealensis'' (Cowper Reed, 1927) (synonym: ''Neoplatyteichum barrealensis'') * † ''Pleurotomaria bicoronata'' Sandberger and Sandberger, 1855 * † ''Pleurotomaria biondii'' Gemmellaro, 1889 * † ''Pleurotomaria bodana'' Roemer, 1855 * † ''Pleurotomaria brennensis'' Reed, 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Entemnotrochus Adansonianus
''Entemnotrochus adansonianus'', common name Adanson's slit shell, is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae. ;Subspecies: * ''Entemnotrochus adansonianus adansonianus'' (Crosse & Fischer, 1861) * ''Entemnotrochus adansonianus bermudensis'' Okutani & Goto, 1983 Description The length of the shell varies between 80 mm and 190 mm. This attractive species has a pale yellowish-fleshy color with numerous, irregular, reddish spots, sometimes vivid, sometimes more or less effaced. The shell has a trochiform shape above, but is plano-convex beneath and concave in the middle. It is concentrically costate-sulcate with granulose ribs. It has many longitudinal wrinkles. The acuminate apex is smooth and yellowish. The 11 whorls increase slowly and are rather planulate at the sutures. The shell is unequally divided by the slit fasciole. Below it is traversed by 7 to 8 spiral granose ribs, above it with longitudinal, oblique, rather ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Entemnotrochus Rumphii
''Entemnotrochus rumphii'', common name the Rumphius' slit shell, is a species of large sea snail with gills and an operculum, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2011). Entemnotrochus rumphii (Schepman, 1879). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=467983 on 2011-04-03 Distribution This marine species occurs off Japan, Taiwan and the Philippines. Description The width of this large gastropod shell is 130–285 mm. The shell has a broadly conoid shape with a convex base. It is moderately umbilicated, the umbilicus penetrating to the apex. It is a little plicated within by the prominent growth lines. The color is yellowish-white, with flames of orange or carmine red, and light violet, particularly developed on the body whorl. The apex is eroded and yellow. The number of whorls is uncertain, probably between 11 and 13. The whorls are visibly convex a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikadotrochus Beyrichii
''Mikadotrochus beyrichii'', common name Beyrich's slit shell, is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae. It was discovered by Franz Martin Hilgendorf in an ancient Japanese collection. Description The size of the shell varies between 50 mm and 100 mm. The shell has a trochiform shape. It is as high as broad. It has a flat base. It shows moderately numerous spiral lines. It is pale yellow, beautifully flamed with 11 red whorls that are regularly increasing. The penultimate whorl has 8 lirae above, 2 in and 2 under the slit fasciole. These lirae are beset with weak nodules, about 3 times as long (in the direction of the spiral) as high or broad. The body whorl has a blunt angle at its base. This base contains 20 concentric lirae, and in the middle a deep pit or "false umbilicus". On the outside it is white, on the inside it is pearly. The thick, pearly columellar margin is S-shaped. Distribution ''M. beyrichii'' is endemic to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikadotrochus Hirasei
''Mikadotrochus hirasei'', common name the emperor's slit shell, is a species of large deepwater sea snail, a marine gastropod mollusk in the family (biology), family Pleurotomariidae, the slit snails. Description The shell has a typical trochoid shape with a spire angle of approximately 72 degrees and nearly smooth sided until the body whorls which are slightly inflated at the shoulder with a rounded periphery. The base is moderately convex to flat, and the shell has a large nacreous (pearly) Columella (gastropod), columellar callus which covers about one third of the base and can be keeled at its outer margin. The aperture (mollusc), aperture is oval, the slit is positioned mid whorl and is long, about 16 to 20 percent of the circumference. The shell is heavily textured with about 20 spiral cords crossed by numerous fine crescent shaped axial growth lines above the selenizone (the area where the shell growth filled in the slit) and about 10 spiral cords below. The shell is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikadotrochus Salmianus
''Mikadotrochus salmianus'', common name the Salmiana slit shell, is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Mikadotrochus salmianus'' (Rolle, 1899). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=467984 on 2013-02-16 ;Subspecies: * ''Mikadotrochus salmianus neocaledonicus'' Anseeuw, 2016 * ''Mikadotrochus salmianus salmianus'' (Rolle, 1899) Description The length of the shell varies between 60 mm and 120 mm. Distribution This species occurs in the Pacific Ocean off Japan, Fiji Islands and the Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ .... References * Anseeuw P. (2016). Two new pleurotomariid subspecie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bayerotrochus Africanus
''Bayerotrochus africanus'', common name the South African slit shell, is a species of sea snail, a marine gastropod mollusc in the family Pleurotomariidae. Description The shell grows to a length of 120 mm. Distribution This species is distributed along South Africa South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri .... References * Williams S.T., Karube S. & Ozawa T. (2008) ''Molecular systematics of Vetigastropoda: Trochidae, Turbinidae and Trochoidea redefined''. Zoologica Scripta 37: 483–506. External links * Pleurotomariidae Gastropods described in 1948 {{Pleurotomariidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurotomariidae
Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea of the subclass Vetigastropoda. This family is a very ancient lineage; there were numerous species in the geological past. The genus includes several hundred fossil forms, mostly Paleozoic. It is one of the oldest gastropod families, commencing in the Cambrian. The superfamily is currently represented by a group of species that live only in deep water. This family has no subfamilies. The first living specimens of a species in this family, '' Perotrochus quoyanus'', were dredged in 1879 in deep water off the West Indies by the "Blake" expedition of William Healey Dall. Description The shell has a trochoidal shape. It is nacreous within. It is umbilicate or imperforate, having a deep slit or sinus in the outer superior margin of the peristome, which serves the purpose of an exhalant phase of respiration., and leaves on the corresponding part of the whorls ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perotrochus Quoyanus Quoyanus
''Perotrochus quoyanus'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P.; Rosenberg, G. (2012). ''Perotrochus quoyanus'' (P. Fischer & Bernardi, 1856). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=467973 on 2013-02-16 ;Subspecies: * ''Perotrochus quoyanus insularis'' Okutani & Goto, 1985 (synonym: ''Perotrochus insularis'' Okutani & Goto, 1985 ) * ''Perotrochus quoyanus quoyanus'' (P. Fischer & Bernardi, 1856) (synonyms: ''Pleurotomaria quoyana'' Fischer & Bernardi, 1856; ''Perotrochus gemma'' F. M. Bayer, 1966; ''Perotrochus coltrorum'' Rios, 2003) Description The shell of ''Perotrochus quoyanus quoyanus'' has a trochiform shape. It is obtusely carinated, with the base rounded, flattened and concave but not umbilicated. The spire is turbinate, terminating in an acuminate apex. The nine, granulose whorls are slowly increasing. They are rounded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurassic
The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of the Mesozoic, Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic magmatic province, Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread Anoxic event, oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar, Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
