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Pseudococculina Gregaria
''Pseudococculina'' is a genus of sea snails, marine gastropod molluscs in the family Pseudococculinidae. Description The white shell has a patelliform shape with a posterior, inclined apex and a compressed, subspiral nucleus. Inside it has a porcellaneous, muscle-scar horseshoe-shaped, interrupted over the head. The animal has a plumate gill, at the right side of the head. The right tentacle is thickened. There are two epipodial (i.e. situated in the lateral grooves between foot and mantle) filaments at the posterior part of the foot. The radula has large rhachidian teeth, with the cusp wanting or very obsolete. The fïrst lateral teeth are triangular, followed by 3 smaller, contorted laterals, with distinct cusps, a large cusped fifth lateral, and numerous uncini. Species Species within the genus ''Pseudococculina'' include: * ''Pseudococculina granulata ''Pseudococculina granulata'' is a species of small sea snail, a marine (ocean), marine gastropod mollusk in the family ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mattheus Marinus Schepman
Mattheus Marinus Schepman (17 August 1847 – 19 November 1919) was a Dutch malacologist. He was one of the foremost collectors of mollusc shells in the Netherlands, and was also high on the overall list of European collectors. Dutch collectors developed an interest in natural history specimens that were collected on worldwide expeditions since the 16th century. An interest in conchology led to numerous shell publications. In 1934 the Nederlandse Malacologische Vereniging (Netherlands Malacological Society) was founded. In commemoration of its 75th anniversary, a book honoring in detail the work of Mattheus Schepman was published. His research Schepman was both a collector and a methodical scientist, which combination "made his collection of great value to the entire malacological community." He was given the opportunity to study a collection by Max Carl Wilhelm Weber, Director of the Zoölogisch Museum Amsterdam (ZMA). Many of the specimens he studied and collected were gathe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudococculina Granulata
''Pseudococculina granulata'' is a species of small sea snail, a marine (ocean), marine gastropod mollusk in the family (biology), family Pseudococculinidae, the false limpets.Rosenberg, G. (2012). ''Pseudococculina granulata'' Schepman, 1908. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=592605 on 2013-02-02 Description The small, white shell is oval and depressed. It is very thin. It grows to a length of 5½ mm. The shell is broader towards the front, the ends are slightly raised. The front and side-slopes are slightly convex. The posterior slope is nearly straight, with a very small impression below the nucleus, This nucleus is smooth, compressed, subspiral, placed at a little more than 6/11 of the total length of the shell. The Sculpture (mollusc), sculpture consists of a few concentric striae. Moreover, the whole surface is covered by very small, crowded granules of an irregular oval, potatolike shape. Sometimes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphiplica Concentrica
''Amphiplica concentrica'' is a species of sea snail, a marine gastropod mollusc in the family Pseudococculinidae . Description The length of the shell attains 9.5 mm, its diameter 7 mm and its heigth 2.75 mm. The microsculpture of the protoconch consists of prismatic crystals. They have one or several gill leaflets on the left side of the soft body. (Original description in German) The shell is white and egg-shaped, appearing rather low, with the apex being situated somewhat behind the middle, inclined backwards and hookedly curved inwards. Towards the front, it slopes gradually and somewhat convexly, while towards the back, it slopes steeply and distinctly concavely. The entire nucleus is smooth and somewhat sunken. The slope of the remaining shell appears weakly convex towards the front and sides, and straight towards the back. The sculpture consists of equally spaced, regular concentric folds that suddenly decrease after the middle; in between these folds, one notices ver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudococculina Subcingulata
''Pseudococculina'' is a genus of sea snails, marine gastropod molluscs in the family Pseudococculinidae. Description The white shell has a patelliform shape with a posterior, inclined apex and a compressed, subspiral nucleus. Inside it has a porcellaneous, muscle-scar horseshoe-shaped, interrupted over the head. The animal has a plumate gill, at the right side of the head. The right tentacle is thickened. There are two epipodial (i.e. situated in the lateral grooves between foot and mantle) filaments at the posterior part of the foot. The radula The radula (; : radulae or radulas) is an anatomical structure used by mollusks 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 ... has large rhachidian teeth, with the cusp wanting or very obsolete. The fïrst lateral teeth are triangular, followed by 3 smaller, contorted laterals, with distinct cusps, a large cuspe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudococculina Rugosoplicata
''Pseudococculina rugosoplicata'' is a species of small sea snail, a marine gastropod mollusk in the family Pseudococculinidae, the false limpets.Bouchet, P. (2012). ''Pseudococculina rugosoplicata'' Schepman, 1908. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=579371 on 2013-02-02 Description The small, white shell has an elevated form. It is oval and thin. The margin rests entirely on a plane surface. The front slope is the largest and has a convex shape. The side slopes are irregularly convex, being slightly compressed at some distance from the apex. The posterior slope is slightly concave. The apex is blunt, placed at about two-thirds of the total length. There is no nucleus caused by a strong erosion of the apex. The sculpture consists of irregular concentric rugosities or wrinkles, generally more distant from each other towards the apex, more crowded towards the margin, with a tendency to form lamellae. On so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudococculina Rosea
''Pseudococculina'' is a genus of sea snails, marine gastropod molluscs in the family Pseudococculinidae. Description The white shell has a patelliform shape with a posterior, inclined apex and a compressed, subspiral nucleus. Inside it has a porcellaneous, muscle-scar horseshoe-shaped, interrupted over the head. The animal has a plumate gill, at the right side of the head. The right tentacle is thickened. There are two epipodial (i.e. situated in the lateral grooves between foot and mantle) filaments at the posterior part of the foot. The radula has large rhachidian teeth, with the cusp wanting or very obsolete. The fïrst lateral teeth are triangular, followed by 3 smaller, contorted laterals, with distinct cusps, a large cusped fifth lateral, and numerous uncini. Species Species within the genus ''Pseudococculina'' include: * ''Pseudococculina granulata'' Schepman, 1908 * ''Pseudococculina gregaria'' B.A. Marshall, 1986 * '' Pseudococculina rimula'' Simone & Cunha, 2003 * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudococculina Rimula
''Pseudococculina rimula'' is a species of sea snail, a marine gastropod mollusc in the family Pseudococculinidae. Distribution This species occurs in the Atlantic Ocean off Southeast Brazil. Description The maximum recorded length of the white, patelliform shell Shell may refer to: Architecture and design * Shell (structure), a thin structure ** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses Science Biology * Seashell, a hard outer layer of a marine ani ... is 3.3 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". '' PLOS One'' 5(1): e8776. . Habitat Minimum recorded depth is 350 m. Maximum recorded depth is 400 m. References Pseudococculinidae Gastropods described in 2003 {{Pseudococculinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudococculina Gregaria
''Pseudococculina'' is a genus of sea snails, marine gastropod molluscs in the family Pseudococculinidae. Description The white shell has a patelliform shape with a posterior, inclined apex and a compressed, subspiral nucleus. Inside it has a porcellaneous, muscle-scar horseshoe-shaped, interrupted over the head. The animal has a plumate gill, at the right side of the head. The right tentacle is thickened. There are two epipodial (i.e. situated in the lateral grooves between foot and mantle) filaments at the posterior part of the foot. The radula has large rhachidian teeth, with the cusp wanting or very obsolete. The fïrst lateral teeth are triangular, followed by 3 smaller, contorted laterals, with distinct cusps, a large cusped fifth lateral, and numerous uncini. Species Species within the genus ''Pseudococculina'' include: * ''Pseudococculina granulata ''Pseudococculina granulata'' is a species of small sea snail, a marine (ocean), marine gastropod mollusk in the family ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (; : radulae or radulas) is an anatomical structure used by mollusks 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 mollusks, and is found in every class of mollusk 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 mollusks. Other predatory marine snails, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apex (mollusc)
In anatomy, an apex (adjectival form: apical) is part of the mollusc shell, shell of a mollusk. The apex is the pointed tip (the oldest part) of the shell of a gastropod, scaphopod, or cephalopod. The apex is used in end-blown conch (instrument), conches. Gastropods The word "apex" is most often used to mean the tip of the spire (mollusc), spire of the shell of a gastropod. The apex is the first-formed, and therefore the oldest, part of the shell. To be more precise, the apex would usually be where the tip of the embryonic shell or protoconch is situated, if that is still present in the adult shell (often it is lost or eroded away). Coiled gastropod shells The phrase apical whorls, or protoconch, means the whorls that constitute the embryonic shell at the apex of the shell, especially when this is clearly distinguishable from the later whorls of the shell, otherwise known as the teleoconch. Comparison of the apical part and the whole shell of ''Otukaia kiheiziebisu'': File:Cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudococculinidae
Pseudococculinidae is a family of small sea snails or false limpets, marine gastropod mollusks in the superfamily Lepetelloidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Gofas, S. (2012). Pseudococculinidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=23106 on 2013-02-09 This family has no subfamilies. The species in this family are hermaphroditic. They can be found from sublittoral to hadal depths. Description The shells are small (less than 6 mm), thin and translucent. The protoconch shows a long, narrow apical fold. Its microscopic sculpture is smooth with fine threads. The asymmetrical radula The radula (; : radulae or radulas) is an anatomical structure used by mollusks 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 ... shows a broad, rachidian to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
