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Podostemaceae
Podostemaceae (riverweed family), a family in the order Malpighiales, comprise about 50 genera and species of more or less thalloid aquatic herbs. Distribution and habitat They are found mostly in tropical and subtropical areas worldwide. Many species are found in a very small geographic area, often even just a single river or waterfall. Because of their small range, many species are seriously threatened, especially from habitat loss (for example, due to dams flooding their habitat). Riverweeds adhere to hard surfaces (generally rock) in rapids and waterfalls of rivers. They are submerged when water levels are high, but during the dry season they live a terrestrial existence, flowering at this time. Their root anatomy is specialized for the purpose of clinging to rocks, and in fact details of the root structure are one of the ways of classifying riverweeds. Ecology In many rivers, Podostemaceae are an important food source for a wide range of animals. For example, the tad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tometes
''Tometes'' is a genus of fish in the family Serrasalmidae found in fast-flowing rivers in northern South America. Adults of all seven species in this genus are phytophagous, feeding primarily on aquatic plants in the family Podostemaceae. The genus name ''Tometes'' was coined in 1850 by Valenciennes in reference to the incisiform teeth. When the type species of the genus, ''T. trilobatus'', was described in 1850, it was placed in synonym with ''Myleus setiger'', the type species of the genus ''Myleus'', which is why ''Tometes'' and ''Myleus'' were considered to be the same genus for a long time. It was just later that the two genera were revalitated and other specimen could be categorized in the genus ''Tometes''. Taxonomy Even today the taxonomic classification of the Serrasalmidae is not an easy task. Many names are placed in synonymy due to a lack of information and insufficient data bases. It was not long ago when it was discovered that ''Tometes'' and ''Myleus'' are tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malpighiales
The Malpighiales comprise one of the largest orders of flowering plants, containing about 36 families and more than species, about 7.8% of the eudicots. The order is very diverse, containing plants as different as the willow, violet, poinsettia, manchineel, rafflesia and coca plant, and are hard to recognize except with molecular phylogenetic evidence. It is not part of any of the classification systems based only on plant morphology. Molecular clock calculations estimate the origin of stem group Malpighiales at around 100 million years ago ( Mya) and the origin of crown group Malpighiales at about 90 Mya. The Malpighiales are divided into 32 to 42 families, depending upon which clades in the order are given the taxonomic rank of family. In the APG III system, 35 families were recognized. Medusagynaceae, Quiinaceae, Peraceae, Malesherbiaceae, Turneraceae, Samydaceae, and Scyphostegiaceae were consolidated into other families. The largest family, by far, is the Euphorbiace ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratolacis
''Ceratolacis'' is a genus of flowering plants belonging to the family Podostemaceae Podostemaceae (riverweed family), a family in the order Malpighiales, comprise about 50 genera and species of more or less thalloid aquatic herbs. Distribution and habitat They are found mostly in tropical and subtropical areas worldwide. Ma .... Its native range is Brazil. Species: *'' Ceratolacis erythrolichen'' *'' Ceratolacis pedunculatum'' References {{Taxonbar, from=Q16544410 Podostemaceae Malpighiales genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castelnavia
''Castelnavia'' is a genus of flowering plants belonging to the family Podostemaceae Podostemaceae (riverweed family), a family in the order Malpighiales, comprise about 50 genera and species of more or less thalloid aquatic herbs. Distribution and habitat They are found mostly in tropical and subtropical areas worldwide. Ma .... Its native range is Brazil. Species: *'' Castelnavia cuneifolia'' *'' Castelnavia fimbriata'' *'' Castelnavia fluitans'' *'' Castelnavia lindmaniana'' *'' Castelnavia monandra'' *'' Castelnavia multipartita'' *'' Castelnavia noveloi'' *'' Castelnavia orthocarpa'' *'' Castelnavia pendulosa'' *'' Castelnavia princeps'' *'' Castelnavia pusillina'' *'' Castelnavia serpens'' References {{Taxonbar, from=Q9703658 Podostemaceae Malpighiales genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apinagia
''Apinagia'' is a genus of flowering plants belonging to the family Podostemaceae Podostemaceae (riverweed family), a family in the order Malpighiales, comprise about 50 genera and species of more or less thalloid aquatic herbs. Distribution and habitat They are found mostly in tropical and subtropical areas worldwide. Ma .... Its native range is Southern Tropical America. Species: *'' Apinagia aripecuruensis'' *'' Apinagia arminensis'' *'' Apinagia batrachiifolia'' *'' Apinagia brejoagrestinensis'' *'' Apinagia brevicaulis'' *'' Apinagia crispa'' *'' Apinagia digitata'' *'' Apinagia dissecta'' *'' Apinagia divaricata'' *'' Apinagia flexuosa'' *'' Apinagia fluitans'' *'' Apinagia fucoides'' *'' Apinagia gardneriana'' *'' Apinagia glaziovii'' *'' Apinagia goejei'' *'' Apinagia guairaensis'' *'' Apinagia guyanensis'' *'' Apinagia hulkiana'' *'' Apinagia itanensis'' *'' Apinagia kochii'' *'' Apinagia latifolia'' *'' Apinagia leptophylla'' *'' Apinagia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angolaea
''Angolaea'' is a genus of flowering plants belonging to the family Podostemaceae Podostemaceae (riverweed family), a family in the order Malpighiales, comprise about 50 genera and species of more or less thalloid aquatic herbs. Distribution and habitat They are found mostly in tropical and subtropical areas worldwide. Ma .... Its native range is Angola. Species: *'' Angolaea fluitans'' References {{Taxonbar, from=Q16480672 Podostemaceae Malpighiales genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serrasalmid
The Serrasalmidae (serrasalmids) are a family of characiform fishes, recently elevated to family status. It includes more than 90 species. The name means "serrated salmon family", which refers to the serrated keel running along the belly of these fish. Fish classified as Serrasalmidae are also known by these common names: pacu, piranha, and silver dollar. These common names generally designate differing dental characteristics and feeding habits. Description Serrasalmids are medium- to large-sized characiform fishes that reach about long, generally characterized by a deep, laterally compressed body with a series of midventral abdominal spines or scutes, and a long dorsal fin (over 16 rays). Most species also possess an anteriorly directed spine just before the dorsal fin extending from a supraneural bone; exceptions include members of the genera '' Colossoma'', '' Piaractus'', and '' Mylossoma''. Most serrasalmids have about 60 chromosomes, ranging from 54 to 62.''Metynnis'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clusiaceae
The Clusiaceae or Guttiferae Juss. (1789) (''nom. alt. et cons.'' = alternative and valid name) are a family (biology), family of plants including 13 genera and ca 750 species. Several former members of Clusiacae are now placed in Calophyllaceae and Hypericaceae. They are mostly trees and shrubs, with milky sap and fruits or capsule (fruit), capsules for seeds. The family is primarily tropical. More so than many plant families, it shows large variation in plant morphology (for example, three to 10, fused or unfused petals, and many other traits). According to the Angiosperm Phylogeny Group, APG III, this family belongs to the order Malpighiales. One feature which is sometimes found in this family, and rarely in others (e.g., Malpighiaceae), is providing pollinators with rewards other than pollen or nectar; specifically, some species offer resin which bees use in nest construction (all three rewards are found in different species of the Clusiaceae). Taxonomic history The family ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utiaritichthys
''Utiaritichthys'' is a genus of serrasalmid fish found in the Amazon and Orinoco basins in tropical South America. The adults are typically found in rapidly flowing water where they feed on aquatic plants in the family Podostemaceae and filamentous algae.Pereira, T.N.A. & Castro, R.M.C. (2014)A new species of Utiaritichthys Miranda Ribeiro (Characiformes: Serrasalmidae) from the Serra dos Parecis, Tapajós drainage.''Neotropical Ichthyology, 12 (2): 397-402''. They reach up to in standard length. The monophyly and taxonomic position of the genus is not fully resolved. The only clear difference from ''Myloplus ''Myloplus'' is a genus of freshwater fish in the family Serrasalmidae found in tropical and subtropical South America, where they inhabit rivers and streams (both slow and fast-flowing). They are primarily herbivores, but also take some animal ...'' is the comparatively longer body of ''Utiaritichthys''. Species There are currently 3 recognized species in this ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ossubtus
''Ossubtus'' is a genus of fish in the family Serrasalmidae. It contains a single species, ''Ossubtus xinguense'', the parrot pacu or eaglebeak pacu, The species is endemic to rapids in the Xingu River basin in the Brazilian Amazon.Andrade, M.C., Sousa, L.M., Ota, R.P., Jégu, M. & Giarrizzo, T. (2016)Redescription and Geographical Distribution of the Endangered Fish ''Ossubtus xinguense'' Jégu 1992 (Characiformes, Serrasalmidae) with Comments on Conservation of the Rheophilic Fauna of the Xingu River.''PLoS ONE, 11 (9): e0161398.'' This endangered species is primarily a herbivore. Description The body of ''Ossubtus xinguense'' is ovoid in shape. The profile of the snout is blunt. In young fish, the mouth is terminal (pointing forward); however, as the fish grows, the mouth turns downward and becomes strictly ventral in individuals longer than . This gives the mouth a beak-like appearance. It reaches up to in total length and about in weight. Range and habitat ''Ossubtus xingu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mylesinus
''Mylesinus'' is a genus of serrasalmids from South America, where found in the eastern Amazon, Essequibo and Orinoco basins. They are rheophilic, typically found at rapids and mainly feed on Podostemaceae plants. Because of their habitat preference, they are threatened by the building of dams. They reach up to in standard length, and the adult males have a double-lobed anal fin and several filamentous extensions on the dorsal fin. Species There are three recognized species: * '' Mylesinus paraschomburgkii'' Jégu, dos Santos & E. J. G. Ferreira, 1989 * '' Mylesinus paucisquamatus'' Jégu & dos Santos, 1988 * '' Mylesinus schomburgkii'' Valenciennes Valenciennes (, also , , ; nl, label=also Dutch, Valencijn; pcd, Valincyinnes or ; la, Valentianae) is a commune in the Nord department, Hauts-de-France, France. It lies on the Scheldt () river. Although the city and region experienced a ..., 1850 References Serrasalmidae Taxa named by Achille Valenciennes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat Destruction
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby reducing biodiversity and species abundance. Habitat destruction is the leading cause of biodiversity loss. Fragmentation and loss of habitat have become one of the most important topics of research in ecology as they are major threats to the survival of endangered species. Activities such as harvesting natural resources, industrial production and urbanization are human contributions to habitat destruction. Pressure from agriculture is the principal human cause. Some others include mining, logging, trawling, and urban sprawl. Habitat destruction is currently considered the primary cause of species extinction worldwide. Environmental factors can contribute to habitat destruction more indirectly. Geological processes, climate change ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
