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Provanna
''Provanna'' is a genus of sea snails, marine gastropod mollusks in the family Provannidae. The species was named after Dall's first wife. This is a very old genus with species already existing in Cretaceous seep deposits off Japan (93 - 100 million years ago). The Caribbean and the Pacific fauna were isolated about 3 million years ago by the closure of the Central American Isthmus. Description The apical whorls of the protoconch are lacking through decollation. The opening is then sealed with a calcareous plug. The sculpture of the ovate fusiform shell shows scattered sigmoidal axial ribs that are crossed by spiral cords. The whorls are broad. Habitat They are common in hydrothermal vents, hydrocarbon cold seeps and (more rarely) on deep-water food-falls, depending on the species. Most species feed on filamentous bacteria, while others feed on detritus. Species Species within the genus ''Provanna'' include: * '' Provanna abyssalis'' Okutani & Fujikura, 2002 * '' Provanna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provanna Hirokoae
''Provanna'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Provannidae. The species was named after Dall's first wife. This is a very old genus with species already existing in Cretaceous seep deposits off Japan (93 - 100 million years ago). The Caribbean and the Pacific fauna were isolated about 3 million years ago by the closure of the Central American Isthmus. Description The apical whorls of the protoconch are lacking through decollation. The opening is then sealed with a calcareous plug. The sculpture of the ovate fusiform shell shows scattered sigmoidal axial ribs that are crossed by spiral cords. The whorls are broad. Habitat They are common in hydrothermal vents, hydrocarbon cold seeps and (more rarely) on deep-water food-falls, depending on the species. Most species feed on filamentous bacteria, while others feed on detritus. Species Species within the genus ''Provanna'' include: * ''Provanna abyssalis'' Okutani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provanna Kuroshimensis
''Provanna'' is a genus of sea snails, marine gastropod mollusks in the family Provannidae. The species was named after Dall's first wife. This is a very old genus with species already existing in Cretaceous seep deposits off Japan (93 - 100 million years ago). The Caribbean and the Pacific fauna were isolated about 3 million years ago by the closure of the Central American Isthmus. Description The apical whorls of the protoconch are lacking through decollation. The opening is then sealed with a calcareous plug. The sculpture of the ovate fusiform shell shows scattered sigmoidal axial ribs that are crossed by spiral cords. The whorls are broad. Habitat They are common in hydrothermal vents, hydrocarbon cold seeps and (more rarely) on deep-water food-falls, depending on the species. Most species feed on filamentous bacteria, while others feed on detritus. Species Species within the genus ''Provanna'' include: * '' Provanna abyssalis'' Okutani & Fujikura, 2002 * '' Provanna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provanna Beebei
''Provanna'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Provannidae. The species was named after Dall's first wife. This is a very old genus with species already existing in Cretaceous seep deposits off Japan (93 - 100 million years ago). The Caribbean and the Pacific fauna were isolated about 3 million years ago by the closure of the Central American Isthmus. Description The apical whorls of the protoconch are lacking through decollation. The opening is then sealed with a calcareous plug. The sculpture of the ovate fusiform shell shows scattered sigmoidal axial ribs that are crossed by spiral cords. The whorls are broad. Habitat They are common in hydrothermal vents, hydrocarbon cold seeps and (more rarely) on deep-water food-falls, depending on the species. Most species feed on filamentous bacteria, while others feed on detritus. Species Species within the genus ''Provanna'' include: * ''Provanna abyssalis'' Okutani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provanna Azurini
''Provanna'' is a genus of sea snails, marine gastropod mollusks in the family Provannidae. The species was named after Dall's first wife. This is a very old genus with species already existing in Cretaceous seep deposits off Japan (93 - 100 million years ago). The Caribbean and the Pacific fauna were isolated about 3 million years ago by the closure of the Central American Isthmus. Description The apical whorls of the protoconch are lacking through decollation. The opening is then sealed with a calcareous plug. The sculpture of the ovate fusiform shell shows scattered sigmoidal axial ribs that are crossed by spiral cords. The whorls are broad. Habitat They are common in hydrothermal vents, hydrocarbon cold seeps and (more rarely) on deep-water food-falls, depending on the species. Most species feed on filamentous bacteria, while others feed on detritus. Species Species within the genus ''Provanna'' include: * '' Provanna abyssalis'' Okutani & Fujikura, 2002 * '' Provanna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provanna Antiqua
''Provanna'' is a genus of sea snails, marine gastropod mollusks in the family Provannidae. The species was named after Dall's first wife. This is a very old genus with species already existing in Cretaceous seep deposits off Japan (93 - 100 million years ago). The Caribbean and the Pacific fauna were isolated about 3 million years ago by the closure of the Central American Isthmus. Description The apical whorls of the protoconch are lacking through decollation. The opening is then sealed with a calcareous plug. The sculpture of the ovate fusiform shell shows scattered sigmoidal axial ribs that are crossed by spiral cords. The whorls are broad. Habitat They are common in hydrothermal vents, hydrocarbon cold seeps and (more rarely) on deep-water food-falls, depending on the species. Most species feed on filamentous bacteria, while others feed on detritus. Species Species within the genus ''Provanna'' include: * '' Provanna abyssalis'' Okutani & Fujikura, 2002 * '' Provanna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provanna Chevalieri
''Provanna chevalieri'' is a species of sea snail, a marine gastropod mollusk in the family Provannidae. Description & Characteristics Provanna chevalieri is a species of gastropod in the family Provannidae. It is known for its unique shell morphology which includes a slender, elongated shape and distinct patterns. Habitat & Distribution Provanna chevalieri is typically found in hydrothermal vent ecosystems in the deep sea. These environments are characterized by extreme conditions, including high pressure, high temperature, and the presence of toxic chemicals. This species commonly occurs at methane seeps in deep water off the Congo River The Congo River, formerly also known as the Zaire River, is the second-longest river in Africa, shorter only than the Nile, as well as the third-largest river in the world list of rivers by discharge, by discharge volume, following the Amazon Ri .... Ecology & Behaviour This species is adapted to survive in harsh deep-sea conditions. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
