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Sagittidae
Sagittidae is a family of sagittoideans in the order Aphragmophora. Genera *'' Aidanosagitta'' Tokioka & Pathansali, 1963Tokioka, T. & Pathansali, D. (1963). Another new chaetognath from Malay waters, with a proposal of grouping some species of ''Sagitta'' into subgenera. ''Publications of the Seto Marine Biological Laboratory'', 11(1), 119–123. *'' Caecosagitta'' Tokioka, 1965Tokioka, T. (1965). The taxonomical outline of Chaetognatha. ''Publications of the Seto Marine Biological Laboratory'', 12(5), 335–357. *'' Decipisagitta'' Bieri, 1991Bieri, R. (1991). Systematics of the Chaetognatha. In Bone, Q., Kapp, H. & Pierrot-Bults, A. (Eds.), ''The Biology of Chaetognaths''. Oxford: Oxford University. *'' Ferosagitta'' Kassatkina, 1971Kassatkina, A. P. (1971). New neritic species of chaetognaths from Poseta Bay, Sea of Japan. ''Investigations of Marine Fauna, Fauna and Flora of Poseta Bay, Sea of Japan'', 8(16), 265–294. *'' Flaccisagitta'' Tokioka, 1965 *'' Mesosagitta'' Toki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sagitta (arrowworm)
''Sagitta'' is a genus of Chaetognatha The Chaetognatha or chaetognaths (meaning ''bristle-jaws'') are a phylum of predatory marine worms that are a major component of plankton worldwide. Commonly known as arrow worms, about 20% of the known Chaetognatha species are benthic, and can ..., a phylum commonly known as arrowworms or arrow worms. Phylum Chaetognatha comprises small marine worms. This genus is characterized in part by the distribution of the cilia on the body, the thick rays in the fins, and hooks which are not serrated.Kassatkina, A. P. (2007)Review of the genera of the family Sagittidae with separation of a new subfamily and description of a new species of the genus ''Sagitta'' from the Sea of Japan (Chaetognatha).''Zoosystematica Rossica'', 16(2), 157-162. As of 2007 there are 15 species. More have since been described.Kassatkina, A. P. (2008)New species of the genus ''Sagitta sensu str''.(Chaetognatha) from the Sea of Japan with description of an original stain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphragmophora
Aphragmophora is an order of sagittodieans in the phylum Chaetognatha. Families * Bathybelidae Bieri, 1989Bieri, R. (1989). Krohnittellidae and Bathybelidae, new families in the phylum Chaetognatha; the rejection of the family Tokiokaispadellidae and the genera ''Tokiokaisapadella'', ''Zahonya'', and ''Aberrospadella''. ''Proceedings of the Biological Society of Washington'', 102(4), 973–976. * Krohnittidae Tokioka, 1965 * Pterokrohniidae Bieri, 1991Bieri, R. (1991). Systematics of the Chaetognatha. In Bone, Q., Kapp, H. & Pierrot-Bults, A. (Eds.), ''The Biology of Chaetognaths''. Oxford: Oxford University. * Pterosagittidae Tokioka, 1965 * Sagittidae Claus & Grobben, 1905Claus, C. & Grobben, K. (1905). ''Lehrbuch der Zoologie''. 7th edition. Marburg-Heßen: NG Elwertsche Verlagsbuchhandlung. See also *Taxonomy of invertebrates (Brusca & Brusca, 2003) The biological systematics and taxonomy of invertebrates as proposed by Richard C. Brusca and Gary J. Brusca in 2003 is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caecosagitta
''Caecosagitta macrocephala'' is a deep sea marine chaetognath that is distributed in meso- and bathypelagic layers. It has a very wide distribution that ranges from the Subantarctic to Subarctic Ocean. Miyamoto, H., Machida, R. & Nishida, S. (2010). Genetic diversity and cryptic speciation of the deep-sea chaetognath ''Caecosagitta macrocephala'' (Fowler, 1904). ''Deep-Sea Research Part II: Topical Studies in Oceanography'', 57(24–26), 2211--2219. Cecosagitta macrocephalas have large heads, hence their name “macro-cephala”. Within their eyes are photoreceptive regions that allow them to catch weak light at bathypelagic depths. Along with their eyes, their gut or intestine has orange pigmentation and a luminous organ that gleams due to bioluminescence unlike some other species of Sagittidae.Thuesen, E. V., Goetz, F. E. & Haddock, S. H. (2010). Bioluminescent organs of two deep-sea arrow-worms, ''Eukrohnia fowleri'' and ''Caecosagitta macrocephala'', with further observations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasagitta
''Parasagitta'' is a genus of arrow worms (phylum Chaetognatha) in the family Sagittidae. At one time these arrow worms were classified in the genus '' Sagitta''. Species The 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 specialist ... includes the following species in the genus: *'' Parasagitta chilensis'' (Villenas & Palma, 2006) *'' Parasagitta elegans'' (Verrill, 1873) *'' Parasagitta euneritica'' (Alvariño, 1961) *'' Parasagitta friderici'' (Ritter-Záhony, 1911) *'' Parasagitta megalophthalma'' (Dallot & Ducret, 1969) *'' Parasagitta peruviana'' (Sund, 1961) *'' Parasagitta popovicii'' (Sund, 1961) *'' Parasagitta setosa'' (Müller, 1847) *'' Parasagitta tenuis'' (Conant, 1896) References Chaetognatha Protostome genera {{Chaetognatha-stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sagittoidea
The Chaetognatha or chaetognaths (meaning ''bristle-jaws'') are a phylum of predatory marine worms that are a major component of plankton worldwide. Commonly known as arrow worms, about 20% of the known Chaetognatha species are benthic zone, benthic, and can attach to algae and rocks. They are found in all marine waters, from surface tropical waters and shallow tide pools to the deep sea and polar regions. Most chaetognaths are transparent and are torpedo shaped, but some deep-sea species are orange. They range in size from . There are more than 120 modern species assigned to over 20 genera. Despite the limited diversity of species, the number of individuals is large. Arrow worms are usually considered a type of protostome that do not belong to either Ecdysozoa or Lophotrochozoa. Anatomy Chaetognaths are transparent or translucent dart-shaped animals covered by a cuticle. The body is divided into a distinct head, trunk, and tail. There are between four and fourteen hooked, gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order (biology)
Order ( la, wikt:ordo#Latin, ordo) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between Family_(biology), family and Class_(biology), class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. An immediately higher rank, superorder, is sometimes added directly above order, with suborder directly beneath order. An order can also be defined as a group of related families. What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order. Some taxa are accepted almost universally, while others are recognized only rarely. The name of an order is usually written with a capital letter. Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
