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Bullastra Brevispira
''Bullastra'' is a genus of large-sized, globose snails in the family Lymnaeidae. Snails in this genus have large apertures and fleshy, triangular tentacles. This genus is similar to Austropeplea but differs in generally being larger and having a distinctive twist in the Columella (gastropod), columella. Distribution and habitat Bullastra are found in the Philippines and on mainland Australia. They are fully aquatic, living in smaller bodies of water, such as ponds and streams. Species The genus ''Bullastra'' contains the following 4 species: * ''Bullastra brevispira'' (Martens, 1897) * ''Bullastra cumingiana'' (Pfeiffer, 1855) * ''Bullastra vinosa'' (Adams and Angas, 1864) * ''Bullastra lessoni'' (Deshayes, 1830) Type species: ''Bullastra velutinoides'' Bergh, 1901 (=''Bullastra cumingiana'' (Pfeiffer, 1855)) References Lymnaeidae {{lymnaeidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the Biology, biological Kingdom (biology), kingdom Animalia (). With few exceptions, animals heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, have myocytes and are motility, able to move, can reproduce sexually, and grow from a hollow sphere of Cell (biology), cells, the blastula, during embryonic development. Animals form a clade, meaning that they arose from a single common ancestor. Over 1.5 million extant taxon, living animal species have been species description, described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from to . They have complex ecologies and biological interaction, interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columella (gastropod)
The columella (meaning "little column") or (in older texts) pillar is a central anatomical feature of a coiled snail shell, a gastropod shell. The columella is often only clearly visible as a structure when the shell is broken, sliced in half vertically, or viewed as an X-ray image. The columella runs from the apex of the shell to the midpoint of the undersurface of the shell, or the tip of the siphonal canal in those shells which have a siphonal canal. If a snail shell is visualized as a cone of shelly material which is wrapped around a central axis, then the columella more or less coincides spatially with the central axis of the shell. In the case of shells that have an umbilicus (mollusc), umbilicus, the columella is a hollow structure. The columella of some groups of gastropod shells can have a number of plications or folds (the columellar fold, plaits or plicae), which are usually visible when looking to the inner lip into the Aperture (mollusc), aperture of the shell. These ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bullastra Vinosa
''Bullastra'' is a genus of large-sized, globose snails in the family Lymnaeidae. Snails in this genus have large apertures and fleshy, triangular tentacles. This genus is similar to Austropeplea but differs in generally being larger and having a distinctive twist in the columella. Distribution and habitat Bullastra are found in the Philippines and on mainland Australia. They are fully aquatic, living in smaller bodies of water, such as ponds and streams. Species The genus ''Bullastra'' contains the following 4 species: * ''Bullastra brevispira ''Bullastra'' is a genus of large-sized, globose snails in the family Lymnaeidae. Snails in this genus have large apertures and fleshy, triangular tentacles. This genus is similar to Austropeplea but differs in generally being larger and having ...'' (Martens, 1897) * '' Bullastra cumingiana'' (Pfeiffer, 1855) * '' Bullastra vinosa'' (Adams and Angas, 1864) * '' Bullastra lessoni'' (Deshayes, 1830) Type species: ''Bulla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bullastra Brevispira
''Bullastra'' is a genus of large-sized, globose snails in the family Lymnaeidae. Snails in this genus have large apertures and fleshy, triangular tentacles. This genus is similar to Austropeplea but differs in generally being larger and having a distinctive twist in the Columella (gastropod), columella. Distribution and habitat Bullastra are found in the Philippines and on mainland Australia. They are fully aquatic, living in smaller bodies of water, such as ponds and streams. Species The genus ''Bullastra'' contains the following 4 species: * ''Bullastra brevispira'' (Martens, 1897) * ''Bullastra cumingiana'' (Pfeiffer, 1855) * ''Bullastra vinosa'' (Adams and Angas, 1864) * ''Bullastra lessoni'' (Deshayes, 1830) Type species: ''Bullastra velutinoides'' Bergh, 1901 (=''Bullastra cumingiana'' (Pfeiffer, 1855)) References Lymnaeidae {{lymnaeidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Streams
A stream is a continuous body of surface water flowing within the bed and banks of a channel. Depending on its location or certain characteristics, a stream may be referred to by a variety of local or regional names. Long, large streams are usually called rivers, while smaller, less voluminous and more intermittent streams are known, amongst others, as brook, creek, rivulet, rill, run, tributary, feeder, freshet, narrow river, and streamlet. The flow of a stream is controlled by three inputs – surface runoff (from precipitation or meltwater), daylighted subterranean water, and surfaced groundwater (spring water). The surface and subterranean water are highly variable between periods of rainfall. Groundwater, on the other hand, has a relatively constant input and is controlled more by long-term patterns of precipitation. The stream encompasses surface, subsurface and groundwater fluxes that respond to geological, geomorphological, hydrological and biotic controls. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ponds
A pond is a small, still, land-based body of water formed by pooling inside a depression, either naturally or artificially. A pond is smaller than a lake and there are no official criteria distinguishing the two, although defining a pond to be less than in area, less than in depth and with less than 30% of its area covered by emergent vegetation helps in distinguishing the ecology of ponds from those of lakes and wetlands.Clegg, J. (1986). Observer's Book of Pond Life. Frederick Warne, London Ponds can be created by a wide variety of natural processes (e.g. on floodplains as cutoff river channels, by glacial processes, by peatland formation, in coastal dune systems, by beavers). They can simply be isolated depressions (such as a kettle hole, vernal pool, prairie pothole, or simply natural undulations in undrained land) filled by runoff, groundwater, or precipitation, or all three of these. They can be further divided into four zones: vegetation zone, open water, bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller islands. It has a total area of , making it the list of countries and dependencies by area, sixth-largest country in the world and the largest in Oceania. Australia is the world's flattest and driest inhabited continent. It is a megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and Climate of Australia, climates including deserts of Australia, deserts in the Outback, interior and forests of Australia, tropical rainforests along the Eastern states of Australia, coast. The ancestors of Aboriginal Australians began arriving from south-east Asia 50,000 to 65,000 years ago, during the Last Glacial Period, last glacial period. By the time of British settlement, Aboriginal Australians spoke 250 distinct l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philippines
The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a total area of roughly 300,000 square kilometers, which are broadly categorized in Island groups of the Philippines, three main geographical divisions from north to south: Luzon, Visayas, and Mindanao. With a population of over 110 million, it is the world's List of countries and dependencies by population, twelfth-most-populous country. The Philippines is bounded by the South China Sea to the west, the Philippine Sea to the east, and the Celebes Sea to the south. It shares maritime borders with Taiwan to the north, Japan to the northeast, Palau to the east and southeast, Indonesia to the south, Malaysia to the southwest, Vietnam to the west, and China to the northwest. It has Ethnic groups in the Philippines, diverse ethnicities and Culture o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austropeplea
''Austropeplea'' is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Lymnaeidae, the pond snails.Bouchet, P. (2015). ''Austropeplea'' Cotton, 1942. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=724554 on 2016-12-19 Species Species within the genus ''Austropeplea'' include: * '' Austropeplea hispida'' (Ponder & Waterhouse, 1997) * ''Austropeplea lessoni'' (Deshayes, 1830)Correa C. A., Escobar J. S., Durand P., Renaud F., David P., Jarne P., Pointier J.-P. & Hurtrez-Boussès S. (2010). "Bridging gaps in the molecular phylogeny of the Lymnaeidae (Gastropoda: Pulmonata), vectors of Fascioliasis". ''BMC Evolutionary Biology'' 10: 381. . * ''Austropeplea ollula'' * ''Austropeplea tomentosa'' (L. Pfeiffer, 1855) - the type species of the genus ''Austropeplea'' * ''Austropeplea viridis'' (Quoy & Gaimard, 1832) - synonym: ''Lymnaea viridis''Schniebs K., ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusca
Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The number of additional fossil species is estimated between 60,000 and 100,000, and the proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine biology, marine phylum, comprising about 23% of all the named marine organisms. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat, as numerous groups are freshwater mollusc, freshwater and even terrestrial molluscs, terrestrial species. The phylum is typically divided into 7 or 8 taxonomy (biology), taxonomic class (biology), classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurobiology, neurologi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tentacles
In zoology, a tentacle is a flexible, mobile, and elongated organ present in some species of animals, most of them invertebrates. In animal anatomy, tentacles usually occur in one or more pairs. Anatomically, the tentacles of animals work mainly like muscular hydrostats. Most forms of tentacles are used for grasping and feeding. Many are sensory organs, variously receptive to touch, vision, or to the smell or taste of particular foods or threats. Examples of such tentacles are the eyestalks of various kinds of snails. Some kinds of tentacles have both sensory and manipulatory functions. A tentacle is similar to a cirrus, but a cirrus is an organ that usually lacks the tentacle's strength, size, flexibility, or sensitivity. A nautilus has cirri, but a squid has tentacles. Invertebrates Molluscs Many molluscs have tentacles of one form or another. The most familiar are those of the pulmonate land snails, which usually have two sets of tentacles on the head: when exte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
