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Congrogadus Malayanus
''Congrogadus'' is a genus of ray-finned fishes, the type genus of the subfamily Congrogadinae, the eel blennies, part of the dottyback family, Pseudochromidae. The genus ''Congrogadus'' has an Indo-Pacific distribution. Characteristics The species in the genus ''Congrogadus'' differ from their other genera in the subfamily Congogadinae in that they do not have a spot on their shoulder, a similar spot beingloacted on the operculum. Their dorsal and anal fins have a higher number of rays than all the other species in the subfamily except for the species in the genus ''Halidesmus'' which can have up to 90 fin rays. Also compared to the related genera which may have three complete lateral lines, the species in ''Congrogadus'' have only have a single curtailed lateral line. In addition some species which are classified in the subgenus ''Congrogadoides'' have the gill membranes fused to the isthmus. The gill membranes of the subgenus ''Congrogadus'' are not fused while the species i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albert Günther
Albert Karl Ludwig Gotthilf Günther FRS, also Albert Charles Lewis Gotthilf Günther (3 October 1830 – 1 February 1914), was a German-born British zoologist, ichthyologist, and herpetologist. Günther is ranked the second-most productive reptile taxonomist (after George Albert Boulenger) with more than 340 reptile species described. Early life and career Günther was born in Esslingen in Swabia (Württemberg). His father was a ''Stiftungs-Commissar'' in Esslingen and his mother was Eleonora Nagel. He initially schooled at the Stuttgart Gymnasium. His family wished him to train for the ministry of the Lutheran Church for which he moved to the University of Tübingen. A brother shifted from theology to medicine, and he, too, turned to science and medicine at Tübingen in 1852. His first work was "''Ueber den Puppenzustand eines Distoma''". He graduated in medicine with an M.D. from Tübingen in 1858, the same year in which he published a handbook of zoology for students of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through convergent evolution they have independently evolved external superficial fish-like body plans adapted to their marine environments, including most numerously fish, but also mammals such as cetaceans (whales, dolphins, and porpoises), and even extinct ancient marine reptiles such as various known species of ichthyosaurs. Most species have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of large cetaceans to identify individuals in the field. The bony or cartilaginous bones that support the base of the dorsal fin in fish are called ''pterygiophores''. Functions The main purpose of the dorsal fin is to stabilize the animal against rollin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Congrogadus Hierichthys
''Congrogadus'' is a genus of ray-finned fishes, the type genus of the subfamily Congrogadinae, the eel blennies, part of the dottyback family, Pseudochromidae. The genus ''Congrogadus'' has an Indo-Pacific distribution. Characteristics The species in the genus ''Congrogadus'' differ from their other genera in the subfamily Congogadinae in that they do not have a spot on their shoulder, a similar spot beingloacted on the operculum. Their dorsal and anal fins have a higher number of rays than all the other species in the subfamily except for the species in the genus ''Halidesmus'' which can have up to 90 fin rays. Also compared to the related genera which may have three complete lateral lines, the species in ''Congrogadus'' have only have a single curtailed lateral line. In addition some species which are classified in the subgenus ''Congrogadoides'' have the gill membranes fused to the isthmus. The gill membranes of the subgenus ''Congrogadus'' are not fused while the species i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Congrogadus Spinifer
''Congrogadus'' is a genus of ray-finned fishes, the type genus of the subfamily Congrogadinae, the eel blennies, part of the dottyback family, Pseudochromidae. The genus ''Congrogadus'' has an Indo-Pacific distribution. Characteristics The species in the genus ''Congrogadus'' differ from their other genera in the subfamily Congogadinae in that they do not have a spot on their shoulder, a similar spot beingloacted on the operculum. Their dorsal and anal fins have a higher number of rays than all the other species in the subfamily except for the species in the genus ''Halidesmus'' which can have up to 90 fin rays. Also compared to the related genera which may have three complete lateral lines, the species in ''Congrogadus'' have only have a single curtailed lateral line. In addition some species which are classified in the subgenus ''Congrogadoides'' have the gill membranes fused to the isthmus. The gill membranes of the subgenus ''Congrogadus'' are not fused while the species i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Carl Wilhelm Weber
Max Carl Wilhelm Weber van Bosse or Max Wilhelm Carl Weber (5 December 1852, in Bonn – 7 February 1937, in Eerbeek) was a German-Dutch zoologist and biogeographer. Weber studied at the University of Bonn, then at the Humboldt University in Berlin with the zoologist Eduard Carl von Martens (1831–1904). He obtained his doctorate in 1877. Weber taught at the University of Utrecht then participated in an expedition to the Barents Sea. He became Professor of Zoology, Anatomy and Physiology at the University of Amsterdam in 1883. In the same year he received naturalised Dutch citizenship. His discoveries as leader of the Siboga Expedition led him to propose Weber's line, which encloses the region in which the mammalian fauna is exclusively Australasian, as an alternative to Wallace's Line. As is the case with plant species, faunal surveys revealed that for most vertebrate groups Wallace’s line was not the most significant biogeographic boundary. The Tanimbar Island group, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Congrogadus Malayanus
''Congrogadus'' is a genus of ray-finned fishes, the type genus of the subfamily Congrogadinae, the eel blennies, part of the dottyback family, Pseudochromidae. The genus ''Congrogadus'' has an Indo-Pacific distribution. Characteristics The species in the genus ''Congrogadus'' differ from their other genera in the subfamily Congogadinae in that they do not have a spot on their shoulder, a similar spot beingloacted on the operculum. Their dorsal and anal fins have a higher number of rays than all the other species in the subfamily except for the species in the genus ''Halidesmus'' which can have up to 90 fin rays. Also compared to the related genera which may have three complete lateral lines, the species in ''Congrogadus'' have only have a single curtailed lateral line. In addition some species which are classified in the subgenus ''Congrogadoides'' have the gill membranes fused to the isthmus. The gill membranes of the subgenus ''Congrogadus'' are not fused while the species i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Winterbottom (ichthyologist)
Richard Emanuel Winterbottom (22 July 1899 – 9 February 1968) was a British Labour Party politician. Born in Oldham, Lancashire, Winterbottom served in the Royal Navy during World War I. He became an area organiser for a predecessor of the Union of Shop, Distributive and Allied Workers in 1931, then the national organiser in 1944. In 1950, he was elected as the Member of Parliament (MP) for Sheffield Brightside, serving for his first year as Parliamentary Private Secretary to Ness Edwards Ness Edwards (5 April 1897 – 3 May 1968) was a trade unionist and Welsh Labour Party politician: he served as Member of Parliament (MP) for Caerphilly from July 1939 until his death. He was born in Abertillery, Monmouthshire, Wales, the se .... Winterbottom remained in Parliament until his death in 1968. References *M. Stenton and S. Lees, ''Who's Who of British Members of Parliament, Volume IV 1945-1979'' * External links * 1899 births 1968 deaths Labour Party ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Congrogadus Amplimaculatus
''Congrogadus'' is a genus of ray-finned fishes, the type genus of the subfamily Congrogadinae, the eel blennies, part of the dottyback family, Pseudochromidae. The genus ''Congrogadus'' has an Indo-Pacific distribution. Characteristics The species in the genus ''Congrogadus'' differ from their other genera in the subfamily Congogadinae in that they do not have a spot on their shoulder, a similar spot beingloacted on the operculum. Their dorsal and anal fins have a higher number of rays than all the other species in the subfamily except for the species in the genus ''Halidesmus'' which can have up to 90 fin rays. Also compared to the related genera which may have three complete lateral lines, the species in ''Congrogadus'' have only have a single curtailed lateral line. In addition some species which are classified in the subgenus ''Congrogadoides'' have the gill membranes fused to the isthmus. The gill membranes of the subgenus ''Congrogadus'' are not fused while the species i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malay Archipelago
The Malay Archipelago (Indonesian/Malay: , tgl, Kapuluang Malay) is the archipelago between mainland Indochina and Australia. It has also been called the " Malay world," "Nusantara", "East Indies", Indo-Australian Archipelago, Spices Archipelago and other names over time. The name was taken from the 19th-century European concept of a Malay race, later based on the distribution of Austronesian languages. Situated between the Indian and Pacific Oceans, the archipelago of over 25,000 islands and islets is the largest archipelago by area and fourth by number of islands in the world. It includes Brunei, East Timor, Indonesia, Malaysia (East Malaysia), Papua New Guinea, the Philippines and Singapore.''Encyclopædia Britannica''. 2006. Chicago: Encyclopædia Britannica, Inc. The term is largely synonymous with Maritime Southeast Asia. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonads
A gonad, sex gland, or reproductive gland is a mixed gland that produces the gametes and sex hormones of an organism. Female reproductive cells are egg cells, and male reproductive cells are sperm. The male gonad, the testicle, produces sperm in the form of spermatozoa. The female gonad, the ovary, produces egg cells. Both of these gametes are haploid cells. Some hermaphroditic animals have a type of gonad called an ovotestis. Evolution It is hard to find a common origin for gonads, but gonads most likely evolved independently several times. Regulation The gonads are controlled by luteinizing hormone and follicle-stimulating hormone, produced and secreted by gonadotropes or gonadotrophins in the anterior pituitary gland. This secretion is regulated by gonadotropin-releasing hormone produced in the hypothalamus. Development Gonads start developing as a common primordium (an organ in the earliest stage of development), in the form of genital ridges, which are only late ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protogynous Hermaphrodites
Sequential hermaphroditism (called dichogamy in botany) is a type of hermaphroditism that occurs in many fish, gastropods, and plants. Sequential hermaphroditism occurs when the individual changes its sex at some point in its life. In particular, a sequential hermaphrodite produces eggs (female gametes) and sperm (male gametes) at different stages in life. Species that can undergo these changes from one sex to another do so as a normal event within their reproductive cycle that is usually cued by either social structure or the achievement of a certain age or size. In animals, the different types of change are male to female (protandry or protandrous hermaphroditism), female to male (protogyny or protogynous hermaphroditism), bidirectional (serial or bidirectional hermaphroditism). Both protogynous and protandrous hermaphroditism allow the organism to switch between functional male and functional female. Bidirectional hermaphrodites have the capacity for sex change in either directi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subgenus
In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between the generic name and the specific epithet: e.g. the tiger cowry of the Indo-Pacific, ''Cypraea'' (''Cypraea'') ''tigris'' Linnaeus, which belongs to the subgenus ''Cypraea'' of the genus ''Cypraea''. However, it is not mandatory, or even customary, when giving the name of a species, to include the subgeneric name. In the International Code of Nomenclature for algae, fungi, and plants (ICNafp), the subgenus is one of the possible subdivisions of a genus. There is no limit to the number of divisions that are permitted within a genus by adding the prefix "sub-" or in other ways as long as no confusion can result. Article 4 The secondary ranks of section and series are subordinate to subgenus. An example is ''Banksia'' subg. ''Isostylis'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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