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Natica Explicatula
''Natica'' is a genus of small to medium-sized predatory sea snails, marine gastropods in the subfamily Naticinae of the family Naticidae, the moon snails. The genus was erected by Giovanni Antonio Scopoli in 1777.Gofas, S. (2011). Natica Scopoli, 1777. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138240 on 14 April 2011 The genus is known from the Eocene to the Recent periods (age range: 37.2 to 0.012 million years ago). Description The shell is subglobose or obovate, rarely somewhat depressed. The spire is short. The body whorl is enlarged. The aperture is entire, semicircular, with an oblique, edentate, callous columellar side. The prominent umbilicus is deep, often wide, well separated between the contracted columellar margin and the spiral, often thickened base of the columella. A small pit near the callosity is almost distinct. The peristome is sharp, smooth on the interior. The large operculum is calcareous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', 'Eos, Dawn') and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch.See: *Letter from William Whewell to Charles Lyell dated 31 January 1831 in: * From p. 55: "The period next antecedent we shall call Eocene, from ήως, aurora, and χαινος, recens, because the extremely small proportion of living species contained in these strata, indicates what may be considered the first commencement, or ''dawn'', of the existing state of the animate creation." The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isoto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operculum (gastropod)
An operculum (; ) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also in a few groups of land snails, including the Helicinidae, Cyclophoridae, Aciculidae, Maizaniidae, Pomatiidae, etc. The operculum is attached to the upper surface of the foot and in its most complete state, it serves as a sort of "trapdoor" to close the aperture (mollusc), aperture of the shell when the soft parts of the animal are retracted. The shape of the operculum varies greatly from one family of gastropods to another. It is fairly often circular, or more or less oval in shape. In species where the operculum fits snugly, its outline corresponds exactly to the shape of the aperture (mollusc), aperture of the shell and it serves to seal the entrance of the shell. Many families have opercula that are reduced in size, and which are not capable of closing the shell aperture. Opercula have sometimes been modifie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natica Buriasiensis
''Natica'' is a genus of small to medium-sized predatory sea snails, marine gastropods in the subfamily Naticinae of the family Naticidae, the moon snails. The genus was erected by Giovanni Antonio Scopoli in 1777.Gofas, S. (2011). Natica Scopoli, 1777. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138240 on 14 April 2011 The genus is known from the Eocene to the Recent periods (age range: 37.2 to 0.012 million years ago). Description The shell is subglobose or obovate, rarely somewhat depressed. The spire is short. The body whorl is enlarged. The aperture is entire, semicircular, with an oblique, edentate, callous columellar side. The prominent umbilicus is deep, often wide, well separated between the contracted columellar margin and the spiral, often thickened base of the columella. A small pit near the callosity is almost distinct. The peristome is sharp, smooth on the interior. The large operculum is calcareou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natica Bouvieri
''Natica'' is a genus of small to medium-sized predatory Predation is a biological interaction in which one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill ... sea snails, marine (ocean), marine gastropods in the subfamily Naticinae of the family Naticidae, the moon snails. The genus was erected by Giovanni Antonio Scopoli in 1777.Gofas, S. (2011). Natica Scopoli, 1777. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138240 on 14 April 2011 The genus is known from the Eocene to the Holocene, Recent periods (age range: 37.2 to 0.012 million years ago). Description The shell is subglobose or obovate, rarely somewhat depressed. The Spire (mollusc), spire is short. The body whorl is enlarged. The Aperture (mollusc), aperture is entire, semicircular, with an oblique, edentate, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natica Bibalteata
''Natica'' is a genus of small to medium-sized predatory sea snails, marine gastropods in the subfamily Naticinae of the family Naticidae, the moon snails. The genus was erected by Giovanni Antonio Scopoli in 1777.Gofas, S. (2011). Natica Scopoli, 1777. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138240 on 14 April 2011 The genus is known from the Eocene to the Recent periods (age range: 37.2 to 0.012 million years ago). Description The shell is subglobose or obovate, rarely somewhat depressed. The spire is short. The body whorl is enlarged. The aperture is entire, semicircular, with an oblique, edentate, callous columellar side. The prominent umbilicus is deep, often wide, well separated between the contracted columellar margin and the spiral, often thickened base of the columella. A small pit near the callosity is almost distinct. The peristome is sharp, smooth on the interior. The large operculum is calcareou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natica Arachnoidea
''Natica arachnoidea'', common name : the spider moon snail, is a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails. Description The size of an adult shell varies between 13 mm and 26 mm. Distribution This marine species is distributed in the Indian Ocean along the Mascarene Basin and Mozambique; the Andamans The Andaman Islands () are an archipelago, made up of 200 islands, in the northeastern Indian Ocean about southwest off the coasts of Myanmar's Ayeyarwady Region. Together with the Nicobar Islands to their south, the Andamans serve as a mari ...; in the Western Pacific Ocean and Australia. References * Drivas, J. & M. Jay (1988). Coquillages de La Réunion et de l'île Maurice Kabat A.R. (2000) Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 10. Mollusca, Gastropoda, Naticidae. Zoologische Mededelingen 73(25): 345-380 External links * Kabat A.R. (2000) ''Results of the Rumphius ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natica Apertissima
''Natica'' is a genus of small to medium-sized predatory sea snails, marine gastropods in the subfamily Naticinae of the family Naticidae, the moon snails. The genus was erected by Giovanni Antonio Scopoli in 1777.Gofas, S. (2011). Natica Scopoli, 1777. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138240 on 14 April 2011 The genus is known from the Eocene to the Recent periods (age range: 37.2 to 0.012 million years ago). Description The shell is subglobose or obovate, rarely somewhat depressed. The spire is short. The body whorl is enlarged. The aperture is entire, semicircular, with an oblique, edentate, callous columellar side. The prominent umbilicus is deep, often wide, well separated between the contracted columellar margin and the spiral, often thickened base of the columella. A small pit near the callosity is almost distinct. The peristome is sharp, smooth on the interior. The large operculum is calcareou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
