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Rudjakovia Plicata
''Rudjakovia'' is a monotypic genus of cnidarians belonging to the family Agalmatidae Agalmatidae, or Agalmidae, is a family of siphonophores. Systematic list *Genus '' Agalma'' Eschscholtz, 1825 **''Agalma clausi'' Bedot, 1888 **''Agalma elegans'' (Sars, 1846) **''Agalma okenii'' Eschscholtz, 1825 * Genus '' Athorybia'' Eschscho .... The only species is ''Rudjakovia plicata''. The species was described by R. Y. Margulis in 1982. The species inhabits marine environment. References Agalmatidae Hydrozoan genera {{Siphonophorae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Genus
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical system. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cnidaria
Cnidaria ( ) is a phylum under kingdom Animalia containing over 11,000 species of aquatic invertebrates found both in fresh water, freshwater and marine environments (predominantly the latter), including jellyfish, hydroid (zoology), hydroids, sea anemones, corals and some of the smallest marine parasites. Their distinguishing features are an uncentralized nervous system distributed throughout a gelatinous body and the presence of cnidocytes or cnidoblasts, specialized cells with ejectable flagella used mainly for envenomation and capturing prey. Their bodies consist of mesoglea, a non-living, jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell (biology), cell thick. Cnidarians are also some of the few animals that can reproduce both sexually and asexually. Cnidarians mostly have two basic body forms: swimming medusa (biology), medusae and sessility (motility), sessile polyp (zoology), polyps, both of which are radially symmetrical with mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agalmatidae
Agalmatidae, or Agalmidae, is a family of siphonophores. Systematic list *Genus '' Agalma'' Eschscholtz, 1825 **''Agalma clausi'' Bedot, 1888 **''Agalma elegans'' (Sars, 1846) **''Agalma okenii'' Eschscholtz, 1825 * Genus '' Athorybia'' Eschscholtz, 1829 ** '' Athorybia lucida'' Biggs, 1978 ** '' Athorybia rosacea'' (Forskål, 1775) * Genus '' Frillagalma'' Daniel, 1966 ** '' Frillagalma vityazi'' Daniel, 1966 *Genus '' Halistemma'' Huxley, 1859 **'' Halistemma cupulifera'' Lens & van Riemsdijk, 1908 **'' Halistemma foliacea'' (Quoy & Gaimard, 1833) **'' Halistemma maculatum'' Pugh & Baxter, 2014 **'' Halistemma rubrum'' (Vogt, 1852) **'' Halistemma striata'' Totton, 1965 **'' Halistemma transliratum'' Pugh & Youngbluth, 1988 *Genus '' Lychnagalma'' Haeckel, 1888 **'' Lychnagalma utricularia'' (Claus, 1879) *Genus '' Marrus'' Totton, 1954 **'' Marrus antarcticus'' Totton, 1954 **'' Marrus claudanielis'' Dunn, Pugh & Haddock, 2005 **''Marrus orthocanna'' (Kramp, 1942) **'' Marrus o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
