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Eukrohnia
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Bathypelagica
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Calliops
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Sinica
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Proboscidea
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Minuta
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Macroneura
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Kitoui
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Hamata
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Bathyantarctica
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Flaccicoeca
Eukrohniidae is a family of sagittoideans in the order Phragmophora. It consists of a single genus, ''Eukrohnia'' von Ritter-Záhony, 1909.von Ritter-Za'hony, R. (1909). Die Chaetognathen der Gazelle-Expedition. ''Zoologischer Anzeiger'', 34, 787–793. History The first species of Eukrohniidae, ''Eukrohnia hamata'', was identified by Karl Möbius in 1875. The genus was named ''Eukrohnia'' by R. von Ritter-Záhony in 1909 after August David Krohn. The family was named ''Eukrohniidae'' by Takasi Tokioka in 1965. One of the species, ''Eukrohnia fowleri'', is bioluminescent.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 on bioluminescence in chaetognaths. ''Biological Bulletin'', 219(2), 100–111. Species *'' Eukrohnia bathyantarctica'' David, 1958David, P. (1958). A new species of ''Eukrohnia'' from the southern Ocean with a note on fertili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukrohnia Fowleri
''Eukrohnia fowleri'' is a deep-sea marine arrow worm. It is the only known bioluminescent member of the genus ''Eukrohnia'', and one of the two known species of bioluminescent arrow worms, the other being the distantly related ''Caecosagitta macrocephala''. The bioluminescent organ of ''Eukrohnia fowleri'' is found along the center of its tail fin on both its dorsal and ventral side. It has a secreted bioluminescence that is thought to be coelenterazine Coelenterazine is a luciferin, a molecule that emits light after reaction with oxygen, found in many aquatic organisms across eight phyla. It is the substrate of many luciferases such as ''Renilla reniformis'' luciferase (Rluc), ''Gaussia'' lucif ... based. While both species use luciferases in conjunction with coelenterazine for light emission, the luciferase of ''Eukrohnia fowleri'' is highly stable after 30 minutes while the luciferase of ''Caecosagitta macrocephala'' becomes inactive. So far, there is no other bioluminescent ... [...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] |
