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Tjalfiellidae
Tjalfiellidae is a family of ctenophores belonging to the order Platyctenida. Genera: * '' Tjalfiella'' Mortensen, 1910 '' Tjalfiella'' is recorded by Mortensen (1912) from deep water off Greenland, originally classified as member of Platyctenidae. Its whole length is about 14 cm, the width is 12 cm — smaller than ''Lyrocteis imperatoris ''Lyrocteis'' is a genus of benthic comb jellies. It is the only genus in the monotypic family Lyroctenidae. Morphology The individuals are rather large benthic ctenophores (up to 15 cm) in the shape of a lyre. They have a basal body and ...''.Taku Komai49. A New Remarkable Sessile Ctenophore Proceedings of the Imperial Academy. 17(6): 216-220. Institute of Zoology, Kyoto Imperial University, June 12, 1941. References Tentaculata {{ctenophore-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platyctenidae
Platyctenidae is a family of ctenophores belonging to the order Platyctenida.WoRMSPlatyctenidae/ref> Formerly, '' Tjalfiella'' Mortensen was classified in this familyTaku Komai49. A New Remarkable Sessile Ctenophore Proceedings of the Imperial Academy. 17(6): 216-220. Institute of Zoology, Kyoto Imperial University, June 12, 1941. but appears now to be a member of ist own family Tjalfiellidae.WoRMSTjalfiellidae Komai, 1922/ref> World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific speciali ... (WoRMS) does not list any (remaining) members of the family (as of Nov. 2021), though indicating it as validly published. Therefore it remains unclear if Platyctenidae might be a synonym of Tjalfiellidae. References Tentaculata {{ctenophore-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platyctenida
Platyctenida is an order of comb jellies. Taxonomy Platyctenida is the only benthic group of organisms in the phylum Ctenophora. Platyctenida are considered to be a phylogenetically young group along with the orders Lobata and Beroida and are believed to have stemmed from an ancestral version of the order Cydippida, after some kind of bottleneck effect in the phylum. This has been supported by strong morphological and developmental data, specifically the sharing of what has been termed a "Cydippida-like" larva form in all 4 orders. Platyctenida is thought to be a polyphyletic group. Description Ranging in size 15 cm and below, they have dorsalventrally flattened, oval bodies and secondarily bilaterally symmetrical, platyctenids look very much like nudibranchs or flatworms and are often confused for them. All but 1 species of platyctenids do not possess the iconic ctene rows (the ciliated comb-rows) that distinguishes the Ctenophores but they still possess the pair of ten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ctenophores
Ctenophora (; ctenophore ; ) comprise a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea waters worldwide. They are notable for the groups of cilia they use for swimming (commonly referred to as "combs"), and they are the largest animals to swim with the help of cilia. Depending on the species, adult ctenophores range from a few millimeters to in size. Only 100 to 150 species have been validated, and possibly another 25 have not been fully described and named. The textbook examples are cydippids with egg-shaped bodies and a pair of retractable tentacles fringed with tentilla ("little tentacles") that are covered with colloblasts, sticky cells that capture prey. Their bodies consist of a mass of jelly, with a layer two cells thick on the outside, and another lining the internal cavity. The phylum has a wide range of body forms, including the egg-shaped cydippids with retractable tentacles that capture prey, the flat generally combless plat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenland
Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is the world's largest island. It is one of three constituent countries that form the Kingdom of Denmark, along with Denmark and the Faroe Islands; the citizens of these countries are all citizens of Denmark and the European Union. Greenland's capital is Nuuk. Though a part of the continent of North America, Greenland has been politically and culturally associated with Europe (specifically Norway and Denmark, the colonial powers) for more than a millennium, beginning in 986.The Fate of Greenland's Vikings , by Dale Mackenzie Brown, ''Archaeological Institute of America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyrocteis
''Lyrocteis'' is a genus of benthic comb jellies. It is the only genus in the monotypic family Lyroctenidae. Morphology The individuals are rather large benthic ctenophores (up to 15 cm) in the shape of a lyre. They have a basal body and two curved outgrowths, from which the fishing filaments emanate, which they use to capture their planktonic food.Taku Komai49. A New Remarkable Sessile Ctenophore Proceedings of the Imperial Academy. 17(6): 216-220. Institute of Zoology, Kyoto Imperial University, June 12, 1941. Species The genus comprises the following species:World Register of Marine Species''Lyrocteis'' Komai, 1941 /ref> * ''Lyrocteis flavopallidus'' Robilliard and Dayton, 1972 * ''Lyrocteis imperatoris ''Lyrocteis'' is a genus of benthic comb jellies. It is the only genus in the monotypic family Lyroctenidae. Morphology The individuals are rather large benthic ctenophores (up to 15 cm) in the shape of a lyre. They have a basal body and ...'' Komai, 1941 Re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
