Narcomedusae

	Narcomedusae Narcomedusae is an order (biology), order of hydrozoans in the subclass Trachylinae. Members of this order do not normally have a polyp (zoology), polyp stage. The Medusa (biology), medusa has a dome-shaped bell with thin sides. The tentacles are attached above the lobed margin of the bell with usually a gastric pouch above each. There are no bulbs on the tentacles and no radial canals. Narcomedusans are mostly inhabitants of the open sea and deep waters. They can be found in the Mediterranean in large numbers. Narcomedusae are essential to the ecosystem as they are top-down regulators for the midwater environment. Feeding behavior Narcomedusae use their tentacles to catch large, fast-moving prey. They do this by holding their tentacles perpendicular to the direction they are swimming to cover a larger area. If something is caught they bend the tentacle inwards and coil them at the tips to their mouths. Reproductive features Narcomedusae are hermaphroditic, meaning that they h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Hydrozoa Hydrozoa (hydrozoans; from Ancient Greek ('; "water") and ('; "animals")) is a taxonomy (biology), taxonomic class (biology), class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colony (biology), colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genus, genera within this class live in freshwater ecosystem, freshwater habitats. Hydrozoans are related to jellyfish and corals, which also belong to the phylum (biology), phylum Cnidaria. Some examples of hydrozoans are the freshwater jelly (''Craspedacusta sowerbyi''), freshwater polyps (''Hydra (genus), Hydra''), ''Obelia'', Portuguese man o' war (''Physalia physalis''), chondrophores (Porpitidae), and pink-hearted hydroids (''Tubularia''). Anatomy Most hydrozoan species include both a polyp (zoology), polypoid and a medusa (biology), medusoid stage in their Biological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Tetraplatidae ''Tetraplatia'' is a genus of hydrozoans in the order Narcomedusae. It is the sole genus in the monotypic family Tetraplatidae. Taxonomy and systematics Since their discovery in the 1850s, there has been disagreement over the phylogeny of the tetraplatids. Some authorities considered that they were aberrant hydrozoans while others thought that they were unusual scyphozoans, cubozoans or staurozoans. Examination of the ribosomal DNA has shown that they are hydrozoans in the order Narcomedusae Narcomedusae is an order (biology), order of hydrozoans in the subclass Trachylinae. Members of this order do not normally have a polyp (zoology), polyp stage. The Medusa (biology), medusa has a dome-shaped bell with thin sides. The tentacles ar .... The genus seems to be of recent origin. Genera and species The World Register of Marine Species lists the following taxa in the family Tetraplatidae: Genus ''Tetraplatia'' Busch, 1851 ''Tetraplatia chuni'' Carlgren, 1909 ''Tetraplatia ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Solmarisidae Solmarisidae is a family of hydrozoans in the order Narcomedusae. The name is sometimes spelled "Solmaridae". Characteristics Members of this family have dome-shaped bells and numerous tentacles set above the undulating margin of the bell. They do not have gastric pouches as do other members of the order. The gonads are situated inside the wall of the stomach.Order Narcomedusae - Haeckel, 1879 The Hydrozoa Directory. Retrieved 2011-11-06. Genera and species The World Register of Marine Species lists the following genera and species A species () is o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Aeginidae Aeginidae is a family of hydrozoans in the order Narcomedusae. The family comprises 6 genera and 8 species. Taxonomy The following genera are recognized in the family Aeginidae:Aeginidae World Register of Marine Species. Retrieved 2011-11-06. * '' Aegina Aegina (; ; ) is one of the Saronic Islands of Greece in the Saronic Gulf, from Athens. Tradition derives the name from Aegina (mythology), Aegina, the mother of the mythological hero Aeacus, who was born on the island and became its king. ... '' Eschscholtz, 1829 (2 species) '' Aeginona'' Lindsay, 2017 ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Cuninidae Cuninidae is a family of hydrozoans in the order Narcomedusae Narcomedusae is an order (biology), order of hydrozoans in the subclass Trachylinae. Members of this order do not normally have a polyp (zoology), polyp stage. The Medusa (biology), medusa has a dome-shaped bell with thin sides. The tentacles ar .... They have dome-shaped bells and tentacles set above the undulating margin of the bell. Their gastric pouches contain the gonads situated in line with the tentacles, the number of pouches being the same as the number of tentacles. The pouches do not extend below the points of origin of the primary tentacles. Members of some genera have a peripheral canal system and others do not. No radial canals or secondary tentacles are present.Order Narcomedusae - Haeckel, 1879 The Hydrozoa Directory. Retrieved 2011-11-06.< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Trachylinae Trachylinae (also Trachylina, Trachylinida, etc.) is a subclass of hydrozoans. It is placed at order rank in many older classifications, and limited to contain the Narcomedusae, Trachymedusae, the Actinulidae, then considered an independent order, and also the Limnomedusae which were traditionally placed in the paraphyletic " Hydroida". It is not entirely clear whether the Limnomedusae and the Trachymedusae as conventionally circumscribed are monophyletic The freshwater jelly '' Craspedacusta sowerbyi'' is a well-known member of the Limnomedusae and might thus belong here. Development Of the four orders: Narcomedusae, Trachymedusae, Actinulidae, and Limnomedusae, only Limnomedusae has any sort of polyp stage, and even then it is very tiny(less than 1mm) with no tentacles. This is uncommon for other jellyfish under the phylum cnidaria. These jellyfish also tend to have fewer cells during their embryonic and larvae A larva (; : larvae ) is a distinct juvenile form ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Csiromedusidae ''Csiromedusa medeopolis'' is a species of hydrozoan described in 2010. It was discovered in the estuarine waters of the River Derwent near to the Commonwealth Scientific and Industrial Research Organisation's Marine and Atmospheric Research branch in Hobart, Tasmania, Australia. ''C. medeopolis'' has been described as presenting a new family and genus as well as species. Its binomial name is derived from "CSIRO jellyfish" and "city of gonads". Unlike most other jellyfish, males and females of ''C. medeopolis'' have many gonad A gonad, sex gland, or reproductive gland is a Heterocrine gland, mixed gland and sex organ that produces the gametes and sex hormones of an organism. Female reproductive cells are egg cells, and male reproductive cells are sperm. The male gon ...s located on their dorsal endoderm. These gonads have been described as arranged like "skyscrapers in a downtown business district". References Narcomedusae Hydrozoan genera Cnidarians of Austral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Solmundaeginidae Solmundaeginidae is a family of hydrozoans in the order Narcomedusae. Taxonomy The following genera Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s ... are recognized in the family Solmundaeginidae: * '' Aeginopsis'' Brandt, 1835 * '' Solmundaegina'' Lindsay, 2017 * '' Solmundella'' Haeckel, 1879 References Narcomedusae Cnidarian families {{Hydrozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Bathykorus Bouilloni ''Bathykorus bouilloni'' is a species of hydrozoan first described in 2010. It is a deep-sea species found in the Arctic Ocean, and appears to be common at depths below .''Bathykorus bouilloni'' Raskoff, 2010 Arctic Ocean Diversity. Retrieved November 7, 2011. It is the only species in the monotypic genus ''Bathykorus''. The genus name comes from the Greek ''bathy'' meaning "deep" and ''korus'' meaning "helmet", referring to the depth at which this species is found and to the shape of the bell. Its helmet-like appearance bears a resemblance to the helmet of [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Pseudaeginidae ''Pseudaegina'' is a genus of cnidarians belonging to the monotypic family Pseudaeginidae. The species of this genus are found in Caribbean The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America .... Species: '' Pseudaegina pentanema'' '' Pseudaegina rhodina'' References Narcomedusae Hydrozoan genera {{Hydrozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Medusa (biology) Jellyfish, also known as sea jellies or simply jellies, are the medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals, although a few are anchored to the seabed by stalks rather than being motile. They are made of an umbrella-shaped main body made of mesoglea, known as the ''bell'', and a collection of trailing tentacles on the underside. Via pulsating contractions, the bell can provide propulsion for locomotion through open water. The tentacles are armed with stinging cells and may be used to capture prey or to defend against predators. Jellyfish have a complex life cycle, and the medusa is normally the sexual phase, which produces planula larvae. These then disperse widely and enter a sedentary polyp phase which may include asexual budding before reaching sexual maturity. Jellyfish are found all over the world, from surface waters to the deep sea. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]

Genera and species