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Asthenotoma
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by Coss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Ornata
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Pannus
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Newtoni
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Ligata
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Lanceolata
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Praepannus
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Festiva
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Falunica
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Crenulata
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Conulus
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Colus
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenotoma Bipunctula
''Asthenotoma'' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08 Description This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with '' Trypanotoma'' and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, ''Pleurotoma basteroti'' Desm., of the European Miocene, is said by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |