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Sigapatella Americana
''Sigapatella'' is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Calyptraeidae, the slipper snails, Chinese hat snails, and cup-and-saucer snails.WoRMS (2010). Sigapatella Lesson, 1831. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391489 on 2011-10-31 Taxonomy This group of species was originally classified under ''Calyptraea (Sigapatella)'' by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as ''Sigapatella'' by Beu ''et al.'' and confirmed in 2000 by Camacho et al. (2000) Description The oval shell has a lateral apex. The interior plate has a submarginal axis. The free margin is concave. Species Species within the genus ''Sigapatella'' include: * † '' Sigapatella americana'' Ortmann 1900 * ''Sigapatella calyptraeformis'' (Lamarck) * † ''Sigapatella crater'' (Finlay, 1926) * † ''Sigapatella gigantea'' (Beu, 1970) * ''Sigapatella hedleyi'' (Sm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a Gastropoda, gastropod or snail, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apex (mollusc)
In anatomy, an apex (adjectival form: apical) is part of the 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 conches. Gastropods The word "apex" is most often used to mean the tip of the 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:Calliostoma kiheiziebisu apex.png File:Calliostoma k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Patulosa
''Sigapatella'' is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Calyptraeidae, the slipper snails, Chinese hat snails, and cup-and-saucer snails.WoRMS (2010). Sigapatella Lesson, 1831. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391489 on 2011-10-31 Taxonomy This group of species was originally classified under ''Calyptraea (Sigapatella)'' by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as ''Sigapatella'' by Beu ''et al.'' and confirmed in 2000 by Camacho et al. (2000) Description The oval shell has a lateral apex. The interior plate has a submarginal axis. The free margin is concave. Species Species within the genus ''Sigapatella'' include: * † '' Sigapatella americana'' Ortmann 1900 * '' Sigapatella calyptraeformis'' (Lamarck) * † '' Sigapatella crater'' (Finlay, 1926) * † '' Sigapatella gigantea'' (Beu, 1970) * ''Sigapatella hedleyi'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Otamatea
''Sigapatella'' is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Calyptraeidae, the slipper snails, Chinese hat snails, and cup-and-saucer snails.WoRMS (2010). Sigapatella Lesson, 1831. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391489 on 2011-10-31 Taxonomy This group of species was originally classified under ''Calyptraea (Sigapatella)'' by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as ''Sigapatella'' by Beu ''et al.'' and confirmed in 2000 by Camacho et al. (2000) Description The oval shell has a lateral apex. The interior plate has a submarginal axis. The free margin is concave. Species Species within the genus ''Sigapatella'' include: * † '' Sigapatella americana'' Ortmann 1900 * '' Sigapatella calyptraeformis'' (Lamarck) * † '' Sigapatella crater'' (Finlay, 1926) * † '' Sigapatella gigantea'' (Beu, 1970) * ''Sigapatella hedleyi'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Ohopeana
''Sigapatella ohopeana'' is a species of sea snail, a marine gastropod mollusk in the family Calyptraeidae The Calyptraeidae are a family of small to medium-sized marine prosobranch gastropods. MolluscaBase. Calyptraeidae Lamarck, 1809. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=141 o ..., the slipper snails or slipper limpets, cup-and-saucer snails, and Chinese hat snails. Description Distribution References External links * Calyptraeidae Gastropods described in 2003 {{Calyptraeidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Nukumaruana
''Sigapatella nukumaruana'' is a species of sea snail, a marine gastropod mollusk in the family Calyptraeidae The Calyptraeidae are a family of small to medium-sized marine prosobranch gastropods. MolluscaBase. Calyptraeidae Lamarck, 1809. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=141 o ..., the slipper snails or slipper limpets, cup-and-saucer snails, and Chinese hat snails. Description Distribution References External links * Calyptraeidae Gastropods described in 2003 {{Calyptraeidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Marwick
John Marwick (3 February 1891 – 17 August 1978) was a New Zealand Palaeontology, palaeontologist and geologist. Early life and family Marwick was born near Oamaru, New Zealand, on 3 February 1891, the son of Hugh Marwick, and his wife, Jane née Cuthbert. While at Waitaki Boys' High School he helped to collect fossil shells and learned the beginnings of how to classify mollusca, molluscs. He studied and taught at the University of Otago, and in 1912 gained an MA with first-class honours in with a thesis on geology. In 1915, he married Marion Ivy Mary Keys at Mosgiel. They had two sons and two daughters, all becoming science graduates. Career With the coming of the First World War Marwick joined the Royal New Zealand Army Medical Corps, New Zealand Medical Corps in 1916, and was posted to Egypt. He served there as a medical orderly in the New Zealand Division, and also in Palestine (region), Palestine, Sinai Peninsula, Sinai and Jordan. He won the Military Medal, and returned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Mapalia
''Sigapatella'' is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Calyptraeidae, the slipper snails, Chinese hat snails, and cup-and-saucer snails.WoRMS (2010). Sigapatella Lesson, 1831. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391489 on 2011-10-31 Taxonomy This group of species was originally classified under ''Calyptraea (Sigapatella)'' by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as ''Sigapatella'' by Beu ''et al.'' and confirmed in 2000 by Camacho et al. (2000) Description The oval shell has a lateral apex. The interior plate has a submarginal axis. The free margin is concave. Species Species within the genus ''Sigapatella'' include: * † '' Sigapatella americana'' Ortmann 1900 * ''Sigapatella calyptraeformis'' (Lamarck) * † ''Sigapatella crater'' (Finlay, 1926) * † ''Sigapatella gigantea'' (Beu, 1970) * ''Sigapatella hedleyi'' (Sm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Maccoyi
''Sigapatella'' is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Calyptraeidae, the slipper snails, Chinese hat snails, and cup-and-saucer snails.WoRMS (2010). Sigapatella Lesson, 1831. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391489 on 2011-10-31 Taxonomy This group of species was originally classified under ''Calyptraea (Sigapatella)'' by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as ''Sigapatella'' by Beu ''et al.'' and confirmed in 2000 by Camacho et al. (2000) Description The oval shell has a lateral apex. The interior plate has a submarginal axis. The free margin is concave. Species Species within the genus ''Sigapatella'' include: * † '' Sigapatella americana'' Ortmann 1900 * '' Sigapatella calyptraeformis'' (Lamarck) * † '' Sigapatella crater'' (Finlay, 1926) * † '' Sigapatella gigantea'' (Beu, 1970) * ''Sigapatella hedleyi'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Hedleyi
''Sigapatella'' is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Calyptraeidae, the slipper snails, Chinese hat snails, and cup-and-saucer snails.WoRMS (2010). Sigapatella Lesson, 1831. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391489 on 2011-10-31 Taxonomy This group of species was originally classified under ''Calyptraea (Sigapatella)'' by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as ''Sigapatella'' by Beu ''et al.'' and confirmed in 2000 by Camacho et al. (2000) Description The oval shell has a lateral apex. The interior plate has a submarginal axis. The free margin is concave. Species Species within the genus ''Sigapatella'' include: * † '' Sigapatella americana'' Ortmann 1900 * '' Sigapatella calyptraeformis'' (Lamarck) * † '' Sigapatella crater'' (Finlay, 1926) * † '' Sigapatella gigantea'' (Beu, 1970) * '' Sigapatella hedleyi'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Gigantea
''Sigapatella'' is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Calyptraeidae, the slipper snails, Chinese hat snails, and cup-and-saucer snails.WoRMS (2010). Sigapatella Lesson, 1831. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391489 on 2011-10-31 Taxonomy This group of species was originally classified under ''Calyptraea (Sigapatella)'' by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as ''Sigapatella'' by Beu ''et al.'' and confirmed in 2000 by Camacho et al. (2000) Description The oval shell has a lateral apex. The interior plate has a submarginal axis. The free margin is concave. Species Species within the genus ''Sigapatella'' include: * † '' Sigapatella americana'' Ortmann 1900 * ''Sigapatella calyptraeformis'' (Lamarck) * † ''Sigapatella crater'' (Finlay, 1926) * † '' Sigapatella gigantea'' (Beu, 1970) * ''Sigapatella hedleyi'' (S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigapatella Crater
''Sigapatella'' is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Calyptraeidae, the slipper snails, Chinese hat snails, and cup-and-saucer snails.WoRMS (2010). Sigapatella Lesson, 1831. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391489 on 2011-10-31 Taxonomy This group of species was originally classified under ''Calyptraea (Sigapatella)'' by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as ''Sigapatella'' by Beu ''et al.'' and confirmed in 2000 by Camacho et al. (2000) Description The oval shell has a lateral apex. The interior plate has a submarginal axis. The free margin is concave. Species Species within the genus ''Sigapatella'' include: * † '' Sigapatella americana'' Ortmann 1900 * ''Sigapatella calyptraeformis'' (Lamarck) * † '' Sigapatella crater'' (Finlay, 1926) * † '' Sigapatella gigantea'' (Beu, 1970) * ''Sigapatella hedleyi'' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
