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Septaria (gastropod)
''Septaria'' is a genus of freshwater and brackish water snails, gastropod mollusks in the family Neritidae. These superficially limpet-like snails are native to the Indo-Pacific region.Haynes A. (2001). "A revision of the genus ''Septaria'' FÉRUSSAC, 1803 (Gastropoda: Neritimorpha)". ''Annalen des Naturhistorischen Museums in Wien'' 103B: 177-229PDF Most species are found in rivers and streams, mainly fast-flowing, but two (''S. livida'' and ''S. tesselata''; sometimes in their own subgenus ''Navicella'') live in brackish coastal waters and the lower tidal section of rivers and streams. Their eggs are attached to hard surfaces such as stones. After hatching, many veligers avoid being swept away by the current by swimming close to the bottom, but it is speculated that some flow downstream into the sea only to return to freshwater later. The shell length of these snails is up to , but there are some size variations depending on the exact species. Species Species within the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Septaria Porcellana
''Septaria porcellana'' is a species of freshwater snail, a gastropod mollusk in the family Neritidae. MolluscaBase eds. (2022). MolluscaBase. Septaria porcellana (Linnaeus, 1758). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=818888 on 2022-05-24 ;Subspecies: * '' Septaria porcellana borbonica'' (Bory de Saint-Vincent, 1804) * ''Septaria porcellana porcellana'' (Linnaeus, 1758) Distribution The geographical distribution of ''Septaria porcellana'' includes India, the Philippines, Indonesia, New Guinea and New Caledonia ) , anthem = "" , image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg , map_alt = Location of New Caledonia , map_caption = Location of New Caledonia , mapsize = 290px , subdivision_type = Sovereign st .... Description The length of the shell attains 13.1 mm. Life cycle Human use This species is sold in the ornamental pet trade for use in freshw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Septaria Bougainvillei
A concretion is a hard, compact mass of matter formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil. Concretions are often ovoid or spherical in shape, although irregular shapes also occur. The word 'concretion' is derived from the Latin "(act of) compacting, condensing, congealing, uniting", itself from ''con'' meaning 'together' and ''crescere'' meaning "to grow". Concretions form within layers of sedimentary strata that have already been deposited. They usually form early in the burial history of the sediment, before the rest of the sediment is hardened into rock. This concretionary cement often makes the concretion harder and more resistant to weathering than the host stratum. There is an important distinction to draw between concretions and nodules. Concretions are formed from mineral precipitation around some kind of nucleus while a nodule is a replacement body. Descriptions dating from the 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
