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Archeterokrohnia
''Archeterokrohnia'' is a genus of chaetognaths in the family Heterokrohniidae.The total body length excluding tail fin 28.5; the tail section is 55.2% of the tail fin; head blunt when hooded, triangular after preservation, head with 3.5 mm. Furthermore, the eyes are absent, the trunk section is orange throughout in life, and the organism exists around 3200 m below sea level.Thuesen, Erik V., and Steven H.d. Haddock. “Archeterokrohnia Docrickettsae (Chaetognatha: Phragmophora: Heterokrohniidae), a New Species of Deep-Sea Arrow Worm from the Gulf of California.” Zootaxa, 2013 Magnolia Press, www.mapress.com/j/zt/article/view/zootaxa.3717.3.2/32220. Species *''Archeterokrohnia docrickettsae ''Archeterokrohnia docrickettsae'' is a type of deep-sea marine arrow worm. It is the largest species in the ''Archeterokrohnia ''Archeterokrohnia'' is a genus of chaetognaths in the family Heterokrohniidae Heterokrohniidae is a family of ...'' Thuesen & Haddock, 2013Thuesen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archeterokrohnia Palpifera
''Archeterokrohnia'' is a genus of chaetognaths in the family Heterokrohniidae.The total body length excluding tail fin 28.5; the tail section is 55.2% of the tail fin; head blunt when hooded, triangular after preservation, head with 3.5 mm. Furthermore, the eyes are absent, the trunk section is orange throughout in life, and the organism exists around 3200 m below sea level.Thuesen, Erik V., and Steven H.d. Haddock. “Archeterokrohnia Docrickettsae (Chaetognatha: Phragmophora: Heterokrohniidae), a New Species of Deep-Sea Arrow Worm from the Gulf of California.” Zootaxa, 2013 Magnolia Press, www.mapress.com/j/zt/article/view/zootaxa.3717.3.2/32220. Species *''Archeterokrohnia docrickettsae ''Archeterokrohnia docrickettsae'' is a type of deep-sea marine arrow worm. It is the largest species in the ''Archeterokrohnia ''Archeterokrohnia'' is a genus of chaetognaths in the family Heterokrohniidae.The total body length excluding ta ...'' Thuesen & Haddock, 2013Thuesen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archeterokrohnia Longicaudata
''Archeterokrohnia'' is a genus of chaetognaths in the family Heterokrohniidae.The total body length excluding tail fin 28.5; the tail section is 55.2% of the tail fin; head blunt when hooded, triangular after preservation, head with 3.5 mm. Furthermore, the eyes are absent, the trunk section is orange throughout in life, and the organism exists around 3200 m below sea level.Thuesen, Erik V., and Steven H.d. Haddock. “Archeterokrohnia Docrickettsae (Chaetognatha: Phragmophora: Heterokrohniidae), a New Species of Deep-Sea Arrow Worm from the Gulf of California.” Zootaxa, 2013 Magnolia Press, www.mapress.com/j/zt/article/view/zootaxa.3717.3.2/32220. Species *''Archeterokrohnia docrickettsae'' Thuesen & Haddock, 2013Thuesen, E. V. & Haddock, S. H. (2013). ''Archeterokrohnia docrickettsae'' (Chaetognatha: Phragmophora: Heterokrohniidae), a new species of deep-sea arrow worm from the Gulf of California. ''Zootaxa'', 3717(3), 320–328. *'' Archeterokrohnia longicaudata'' (Ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archeterokrohnia Rubra
''Archeterokrohnia'' is a genus of chaetognaths in the family Heterokrohniidae.The total body length excluding tail fin 28.5; the tail section is 55.2% of the tail fin; head blunt when hooded, triangular after preservation, head with 3.5 mm. Furthermore, the eyes are absent, the trunk section is orange throughout in life, and the organism exists around 3200 m below sea level.Thuesen, Erik V., and Steven H.d. Haddock. “Archeterokrohnia Docrickettsae (Chaetognatha: Phragmophora: Heterokrohniidae), a New Species of Deep-Sea Arrow Worm from the Gulf of California.” Zootaxa, 2013 Magnolia Press, www.mapress.com/j/zt/article/view/zootaxa.3717.3.2/32220. Species *''Archeterokrohnia docrickettsae'' Thuesen & Haddock, 2013Thuesen, E. V. & Haddock, S. H. (2013). ''Archeterokrohnia docrickettsae'' (Chaetognatha: Phragmophora: Heterokrohniidae), a new species of deep-sea arrow worm from the Gulf of California. ''Zootaxa'', 3717(3), 320–328. *''Archeterokrohnia longicaudata'' (Hag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archeterokrohnia Docrickettsae
''Archeterokrohnia docrickettsae'' is a type of deep-sea marine arrow worm. It is the largest species in the ''Archeterokrohnia ''Archeterokrohnia'' is a genus of chaetognaths in the family Heterokrohniidae.The total body length excluding tail fin 28.5; the tail section is 55.2% of the tail fin; head blunt when hooded, triangular after preservation, head with 3.5 m ...'' genus and the first to be found alive. Additionally this species displays an unusual color pattern of orange on its head and trunk with a translucent tail. References Chaetognatha {{Chaetognatha-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterokrohniidae
Heterokrohniidae is a family of sagittoideans in the order Phragmophora. Genera *''Archeterokrohnia'' Casanova, 1986 *''Heterokrohnia'' von Ritter-Záhony, 1911von Ritter-Záhony, R. (1911). Revision der Chatognathen. ''Deutsche Südpolar Expedition, 1901–1903'', 13, 1–71. *''Xenokrohnia ''Xenokrohnia'' is a genus of chaetognaths in the family Heterokrohniidae. It consists of one species, ''Xenokrohnia sorbei'' Casanova, 1993, which lives in a marine environment. The initial discovery was made from six specimens found in a deep- ...'' Casanova, 1993Casanova, J. (1992). A new genus and species of deep-sea chaetognath from the Bay of Biscal with a strange ventral secretory gland. ''Journal of Natural History'', 27(2), 445–455. References Chaetognatha Protostome families {{Chaetognatha-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holotype
A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept. For example, the holotype for the butterfly '' Plebejus idas longinus'' is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany, an isotype is a duplicate of the holotype, where holotype and isotypes are often pieces from the same individual plant or samples from the same gathering. A holotype is not necessarily "typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatomical Terms Of Location
Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal. Additionally, for some animals such as invertebrates, some terms may not have any meaning at all; for example, an animal that is radially symmetrical will have no anterior surface, but can still have a description that a part is close to the middle ("proximal") or further from the middle ("distal"). International organisations have determined vocabularies that are often used as standard vocabularies for subdisciplines of anatom ... [...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] |
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] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
