|
Pteronema
''Pteronema'' is a genus of hydrozoans belonging to the monotypic family Pteronemidae. Species: *'' Pteronema ambiguum'' *'' Pteronema darwinii'' References Capitata Hydrozoan genera {{anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteronema Ambiguum
''Pteronema'' is a genus of hydrozoans belonging to the monotypic family Pteronemidae. Species: *'' Pteronema ambiguum'' *''Pteronema darwinii ''Pteronema'' is a genus of hydrozoans belonging to the monotypic family Pteronemidae. Species: *'' Pteronema ambiguum'' *'' Pteronema darwinii'' References Capitata Hydrozoan genera {{anthoathecata-stub ...'' References Capitata Hydrozoan genera {{anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrozoa
Hydrozoa (hydrozoans; ) are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genera within this class live in freshwater habitats. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria. Some examples of hydrozoans are the freshwater jelly ('' Craspedacusta sowerbyi''), freshwater polyps (''Hydra''), '' Obelia'', Portuguese man o' war (''Physalia physalis''), chondrophores (Porpitidae), " air fern" (''Sertularia argentea''), and pink-hearted hydroids ('' Tubularia''). Anatomy Most hydrozoan species include both a polypoid and a medusoid stage in their lifecycles, although a number of them have only one or the other. For example, ''Hydra'' has no medusoid stage, while '' Liriope'' lacks the polypoid stage. Polyps The hydro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capitata
Capitata is a suborder of Hydrozoa, a class of marine invertebrates belonging to the phylum Cnidaria. Characteristics Members of this suborder are characterised by the tentacles of the polyps terminating in knobs. In some species these are only present in juvenile forms being replaced in adults by more threadlike tentacles. A high nematocyst concentration is present in the knobs. A few species in this group are better known as their solitary medusa form than as their polyp form. These include ''Sarsia'', ''Polyorchis'' and '' Cladonema''. Families According to the World Register of Marine Species, the following families are found in this suborder : *Asyncorynidae Kramp, 1949 *Cladocorynidae Allman, 1872 *Cladonematidae Gegenbaur, 1857 *Corynidae Johnston, 1836 *Halimedusidae Arai & Brinckmann-Voss, 1980 *Hydrocorynidae Rees, 1957 *Milleporidae Fleming, 1828 *Moerisiidae Poche, 1914 *Pennariidae McCrady, 1859 * Porpitidae Goldfuss, 1818 *Pseudosolanderiidae Bouillon & Gravi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
