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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] |
Parasagitta Euneritica
''Parasagitta'' is a genus of arrow worms (phylum Chaetognatha) in the family 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 .... At one time these arrow worms were classified in the genus '' Sagitta''. Species The World Register of Marine Species 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasagitta Chilensis
''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 includes the following species in the genus: *'' Parasagitta chilensis'' (Villenas & Palma, 2006) *'' Parasagitta elegans'' (Verrill, 1873) *''Parasagitta euneritica ''Parasagitta'' is a genus of arrow worms (phylum Chaetognatha) in the family Sagittidae Sagittidae is a family of sagittoideans in the order Aphragmophora. Genera *'' Aidanosagitta'' Tokioka & Pathansali, 1963Tokioka, T. & Pathansali, D. ...'' (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- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasagitta Friderici
''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 includes the following species in the genus: *''Parasagitta chilensis'' (Villenas & Palma, 2006) *'' Parasagitta elegans'' (Verrill, 1873) *''Parasagitta euneritica ''Parasagitta'' is a genus of arrow worms (phylum Chaetognatha) in the family Sagittidae Sagittidae is a family of sagittoideans in the order Aphragmophora. Genera *'' Aidanosagitta'' Tokioka & Pathansali, 1963Tokioka, T. & Pathansali, D. ...'' (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-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasagitta Megalophthalma
''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 includes the following species in the genus: *''Parasagitta chilensis'' (Villenas & Palma, 2006) *'' Parasagitta elegans'' (Verrill, 1873) *''Parasagitta euneritica'' (Alvariño, 1961) *''Parasagitta friderici ''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 includes the following species i ...'' (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-st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasagitta Peruviana
''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 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 ''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 includes the following species i ...'' (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] |
Parasagitta Popovicii
''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 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 ''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 includes the following species i ...'' (Sund, 1961) *'' Parasagitta popovicii'' (Sund, 1961) *'' Parasagitta setosa'' (Müller, 1847) *'' Parasagitta tenuis'' (Conant, 1896) References Chaetognatha Protostome genera {{Chaetognatha-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasagitta Tenuis
''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 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 ''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 includes the following species i ...'' (Sund, 1961) *'' Parasagitta setosa'' (Müller, 1847) *'' Parasagitta tenuis'' (Conant, 1896) References Chaetognatha Protostome genera {{Chaetognatha-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasagitta Setosa
''Parasagitta setosa'' is a small arrow worm in the family Sagittidae, previously referred to as ''Sagitta setosa''. It is native to the northeastern Atlantic Ocean, the North Sea and the Mediterranean Sea, and also occurs in the Baltic Sea and the Black Sea. Description ''Parasagitta setosa'' grows to a maximum length of , its tail being up to a quarter of this length. It is a thin, transparent, flexible worm with two pairs of rounded lateral fins composed completely of ray-like structures. There are eight to nine curved grasping hooks on the head. The teeth are in two rows, with six to eight in the front row and ten to sixteen at the back. The eyes have a star-shaped segment spot and the collarette is small or not present at all. The seminal vesicles are very near the posterior fins which are separated from the caudal fin. Distribution ''Parasagitta setosa'' is a common neritic species forming part of the plankton in waters less than about 200 metres deep. It occurs in the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasagitta Elegans
''Parasagitta elegans'' is a small arrow worm in the family Sagittidae, previously named ''Sagitta elegans'' Morphology ''Parasagitta elegans'' (prev. ''Sagitta elegans''). Body of adult animal can grow up to 45 mm, is narrow, firm and opaque (this image: animal very see-through. Visible opaque animal needs better picture). Fins are separated, rounded, and completely rayed. Anterior fins beginning below the ventral ganglion. Alimentary diverticula present. Eyes with small, round pigment spot. Ovaries long and narrow. Seminal vesicles conical in shape, either exactly next to or very close to the tail fin, separated from posterior fins. For anatomy, reproduction, classification, and fossil record; see Chaetognatha Taxonomy Three subspecies are recognised - ''Sagitta elegans arctica'', ''Sagitta elegans baltica'' and ''Sagitta elegans elegans''. The subspecies are considered to vary in size depending on the temperature of the waters in which they develop, which could be an indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 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, grasping spines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
