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Caenorhabditis Angaria
''Caenorhabditis angaria'' is a small nematode, in the same genus as the model organism ''Caenorhabditis elegans''. The name is from the Latin (''angarius'' "mounted courier") after the tendency to ride weevils. Prior to 2011, the species was referred to as ''C. sp. 2'', ''C. sp. 3'', and ''C. sp. PS1010''. Its genome was sequenced at the California Institute of Technology in 2010. This species is gonochoristic. It has distinct morphology and behavior compared to ''C. elegans''; notably, ''C. angaria'' males exhibit a spiral mating behavior. Its divergence from ''C. elegans'' is similar to the distance between humans and fish. ''C. castelli'' is its closest relative, and the two species can produce F1 hybrids. ''C. angaria'' was isolated in Trinidad and Florida, found in association with palm and sugarcane weevils, ''Rhynchophorus palmarum The South American palm weevil, ''Rhynchophorus palmarum'', is a species of snout beetle. The adults are relatively large black beetles of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nematode
The nematodes ( or grc-gre, Νηματώδη; la, Nematoda) or roundworms constitute the phylum Nematoda (also called Nemathelminthes), with plant-Parasitism, parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments. Less formally, they are categorized as Helminths, but are taxonomically classified along with Arthropod, arthropods, Tardigrade, tardigrades and other moulting animalia, animals in the clade Ecdysozoa, and unlike platyhelminthe, flatworms, have tubular digestion, digestive systems with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum. Nematode species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species described to date vary by author and may change rapidly over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caenorhabditis Elegans
''Caenorhabditis elegans'' () is a free-living transparent nematode about 1 mm in length that lives in temperate soil environments. It is the type species of its genus. The name is a blend of the Greek ''caeno-'' (recent), ''rhabditis'' (rod-like) and Latin ''elegans'' (elegant). In 1900, Maupas initially named it '' Rhabditides elegans.'' Osche placed it in the subgenus ''Caenorhabditis'' in 1952, and in 1955, Dougherty raised ''Caenorhabditis'' to the status of genus. ''C. elegans'' is an unsegmented pseudocoelomate and lacks respiratory or circulatory systems. Most of these nematodes are hermaphrodites and a few are males. Males have specialised tails for mating that include spicules. In 1963, Sydney Brenner proposed research into ''C. elegans,'' primarily in the area of neuronal development. In 1974, he began research into the molecular and developmental biology of ''C. elegans'', which has since been extensively used as a model organism. It was the first multicellu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Institute Of Technology
The California Institute of Technology (branded as Caltech or CIT)The university itself only spells its short form as "Caltech"; the institution considers other spellings such a"Cal Tech" and "CalTech" incorrect. The institute is also occasionally referred to as "CIT", most notably in its alma mater, but this is uncommon. is a private research university in Pasadena, California. Caltech is ranked among the best and most selective academic institutions in the world, and with an enrollment of approximately 2400 students (acceptance rate of only 5.7%), it is one of the world's most selective universities. The university is known for its strength in science and engineering, and is among a small group of institutes of technology in the United States which is primarily devoted to the instruction of pure and applied sciences. The institution was founded as a preparatory and vocational school by Amos G. Throop in 1891 and began attracting influential scientists such as George Ellery H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonochorism
In biology, gonochorism is a sexual system where there are only two Sex, sexes and each individual organism is either male or female. The term gonochorism is usually applied in animal species, the vast majority of which are gonochoric. Gonochorism contrasts with Hermaphrodite, simultaneous hermaphroditism but it may be hard to tell if a species is gonochoric or sequentially hermaphroditic. (e.g. Parrotfish, ''Patella ferruginea''). However, in gonochoric species individuals remain either male or female throughout their lives. Species that reproduce by Thelytokous, thelytokous parthenogenesis and do not have males can still be classified as gonochoric. Terminology The term is derived from Greek language, Greek (''gone'', generation) + (''chorizein,'' to separate). The term gonochorism originally came from German gonochorismus. Gonochorism is also referred to as unisexualism or gonochory. Evolution Gonochorism has Convergent evolution, evolved independently multiple time ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction. Hybrids are not always intermediates between their parents (such as in blending inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridisation, which include genetic and morphological differences, differing times of fertility, mating behaviors and cues, and physiological rejection of sperm cells or the developing embryo. Some act before fertilization and others after it. Similar barriers exist in plants, with differences in flowering tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchophorus Palmarum
The South American palm weevil, ''Rhynchophorus palmarum'', is a species of snout beetle. The adults are relatively large black beetles of approximately one and a half inch in length, and the larvae may grow to two inches in length. Biology and behavior These insects are attracted to the release of volatile compounds produced by injured palm trees. The larvae burrow through the hearts of palms, and their feeding can potentially kill an infested palm or serve as an avenue for secondary infections of bacterial disease. It is considered an important pest of cultivated coconut, date and oil palms, attacking thirty-five different species in twelve different families.Griffith, R. 1987. "Red ring disease of coconut palm". ''Plant Disease'' 71: 193–196.Sanchez, P and H. Cerda. 1993. "El complejo de ''Rhynchophorus palmarum/Bursaphelenchus cocophilus'' en palmas". ''Boletín di Entomología Venezolana'' 8, 1–18 It has also been documented as an occasional pest of sugar cane. This inse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metamasius Hemipterus
''Metamasius'' is a genus of bromeliad weevils in the beetle family Dryophthoridae. There are more than 120 described species in ''Metamasius''. See also * List of Metamasius species This is a list of 122 species in the genus ''Metamasius'', bromeliad weevils. ''Metamasius'' species * '' Metamasius alterans'' Hustache, 1936 * '' Metamasius alveolus'' Vaurie, 1968 * '' Metamasius ambiguus'' Csiki, E., 1936 * '' Metamasius amp ... References Further reading * * External links * Dryophthorinae Articles created by Qbugbot {{Dryophthorinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caenorhabditis Castelli
Introduction ''Caenorhabditis castelli'' is a species of ''Caenorhabditis'' nematodes, a member of the same genus as the model organism ''Caenorhabditis elegans''. Within this genus, ''C. castelli'' belongs to the ''Drosophilae'' super-group, and ''Angaria'' group. This species is a close relative of ''C. angaria'' /sup> and was referred to as “C. sp. 12” prior to 2014 /sup>. ''C. castelli'' was discovered from rotting '' Micropholis cayennensis'' fruit in the Nouragues Nature Reserve of tropical French Guiana in 2008 /sup>. It is one of the rarest species found in French Guiana /sup>. Anatomy The mean body length of adult female ''C. castelli'' was measured to be 1212.24µm and for adult males, 827.61µm, which is comparable to the average male body size of the model organism ''C. elegans'' (824.74µm) /sup>. Spicule shape The spicules of ''C. castelli'' males possess a short, stout, evenly curved, complex morphology, similar to other ''Caenorhabditis'' species wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nematodes Described In 2011
The nematodes ( or grc-gre, Νηματώδη; la, Nematoda) or roundworms constitute the phylum Nematoda (also called Nemathelminthes), with plant- parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments. Less formally, they are categorized as Helminths, but are taxonomically classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa, and unlike flatworms, have tubular digestive systems with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum. Nematode species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species described to date vary by author and may change rapidly over time. A 2013 survey of animal biodiversity published in the mega jo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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