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Davainea
''Davainea'' is a genus of flatworms belonging to the family Davaineidae. The genus has cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The ext .... Species: *'' Davainea andrei'' *'' Davainea proglottina'' *'' Davainea tetraoensis'' References {{Taxonbar, from=Q18193395 Platyhelminthes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Davainea Andrei
''Davainea'' is a genus of flatworms belonging to the family Davaineidae. The genus has cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The ext .... Species: *'' Davainea andrei'' *'' Davainea proglottina'' *'' Davainea tetraoensis'' References {{Taxonbar, from=Q18193395 Platyhelminthes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Davainea Proglottina
''Davainea'' is a genus of flatworms belonging to the family Davaineidae. The genus has cosmopolitan distribution. Species: *''Davainea andrei ''Davainea'' is a genus of flatworms belonging to the family Davaineidae. The genus has cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world i ...'' *'' Davainea proglottina'' *'' Davainea tetraoensis'' References {{Taxonbar, from=Q18193395 Platyhelminthes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Davainea Tetraoensis
''Davainea'' is a genus of flatworms belonging to the family Davaineidae. The genus has cosmopolitan distribution. Species: *''Davainea andrei'' *''Davainea proglottina ''Davainea'' is a genus of flatworms belonging to the family Davaineidae. The genus has cosmopolitan distribution. Species: *''Davainea andrei ''Davainea'' is a genus of flatworms belonging to the family Davaineidae. The genus has cosmopol ...'' *'' Davainea tetraoensis'' References {{Taxonbar, from=Q18193395 Platyhelminthes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Davaineidae
Davaineidae is the name of a family of tapeworms that includes helminth parasites of vertebrates. Of the 14 genera recorded under this family, '' Raillietina'' is the best understood and most extensively studied. Members of the family are characterized by the presence of a crown (rostellum) at the tip of the scolex, and the rostellum is made up of mattock- or hammer-shaped hooks. The rostellum is surrounded by suckers which are armed with spines. These tapeworms are most commonly found in birds, and in few cases, mammals, which are the definitive hosts. Intermediate hosts are small insects such as ants. Hosts of ''Davainea proglottina'' (length 1 – 4 mm), for example, are chickens. Slugs are the intermediate hosts.Mehlhorn, Heinz (1998): ''Grundriß der Parasitenkunde''. G. Fischer Stuttgart. Genera * '' Calostaurus'' Sandars, 1957 * ''Cotugnia'' Diamare, 1893 * ''Davainea'' Blanchard, 1891 * ''Fernandezia'' Lopez-Neyra, 1936 * ''Fuhrmannetta'' Stiles & Orleman, 1926 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flatworms
The flatworms, flat worms, Platyhelminthes, or platyhelminths (from the Greek πλατύ, ''platy'', meaning "flat" and ἕλμινς (root: ἑλμινθ-), ''helminth-'', meaning "worm") are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates. Unlike other bilaterians, they are acoelomates (having no body cavity), and have no specialized circulatory and respiratory organs, which restricts them to having flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion. The digestive cavity has only one opening for both ingestion (intake of nutrients) and egestion (removal of undigested wastes); as a result, the food cannot be processed continuously. In traditional medicinal texts, Platyhelminthes are divided into Turbellaria, which are mostly non-parasitic animals such as planarians, and three entirely parasitic groups: Cestoda, Trematoda and Monogenea; however, since the turbellarians have since been proven not to be mono ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
