Rhabditia

	Rhabditia Subclass Rhabditia is mostly composed of parasitic nematodes (particularly in the Strongylida), though there are some free-living species as well (particularly in the Rhabditida). Phasmids (posterior sensory structures) are well-developed, while amphids (anterior sensory structures) are poorly developed or absent in this group. In an alternate classification system, they are treated as suborder Rhabditina, with the orders listed here being ranked as infraorders. Also, the Diplogasterida, which are sometimes considered a monotypic subclass, are probably better placed in the Rhabditia. On the other hand, the old placement of the Ascaridida in Rhabditia instead of Spiruria seems unwarranted. The Rhabditida contain a number of family (biology)">families Family (from ) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictability, structur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Nematode The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (helminths) are the cause of soil-transmitted helminthiases. They are classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa. Unlike the flatworms, nematodes have a tubular digestive system, 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 are uncertain. A 2013 survey of animal biodiversity suggested there are over 25,000. Estimates of the total number of extant species are su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Rhabditida Rhabditida is an order of free-living, parasitic and microbivorous nematodes living in soil. The Cephalobidae, Panagrolaimidae, Steinernematidae, and Strongyloididae seem to be closer to the Tylenchia, regardless of whether these are merged with the Rhabditia or not.Tree of Life Web Project (2002b)Nematoda Version of 2002-JAN-01. Retrieved 2008-NOV-02. Families Rhabditida * Myolaimina ''Incertae sedis'' * Myolaimoidea **** Myolaimidae * Rhabditina Bunonematomorpha * Bunonematoidea ** Bunonematidae Diplogasteromorpha * Cylindrocorporoidea Cylindrocorporidae * Diplogasteroidea **Cephalobiidae Diplogasteridae Diplogasteroididae Rhabditomorpha * Mesorhabditoidea Peloderidae * Rhabditoidea **** Rhabditidae Spirurina * Ascaridomorpha * Ascaridoidea Acanthocheilidae Anisakidae Ascarididae Heterocheilidae Raphidascarididae * Cosmocercoidea ** Atractidae Kathlaniidae * Seuratoidea **** Cucullanidae * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Ancylostoma Caninum ''Ancylostoma caninum'' is a species of nematode known as a hookworm, which principally infects the small intestine of dogs. The result of ''A. caninum'' infection ranges from asymptomatic cases to death of the dog; better nourishment, increasing age, prior ''A. caninum'' exposure, or vaccination are all linked to improved survival. Other hosts include carnivores such as wolves, foxes, and cats, with a small number of cases having been reported in humans. Warm and moist conditions are important to allow survival of ''A. caninum'' during the free-living stages of its lifecycle, so it is largely restricted to temperate, tropical, and subtropical regions. In parts of the world where these climatic requirements are met such as Sri Lanka, Southeast Asia, and Malaysia, ''A. caninum'' is the main cause of hookworm disease in canines. Morphology ''A. caninum'' females are typically long and wide, while the males are smaller at in length and in width. Males have a copulat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Diplogasterida Diplogasterida was an order of nematodes. It was sometimes placed in a monotypic subclass Diplogasteria, but molecular phylogenetic evidence has shown it to be embedded in the family Rhabditidae (formerly Rhabditina). The confusion of having a hierarchical nesting of groups that were formerly mutually exclusive has led to a profusion of names. Although completely revised taxonomy of nematodes that builds on recent classification systems as well as recent phylogenetic evidence is still necessary, most contemporary taxonomic studies now treat all groups listed under "Diplogasterina" below as a single family, Diplogastridae. Subdivisions Suborder Chambersiellina Hodda 2007 Superfamily Chambersielloidea Thorne 1937 *Family Chambersiellidae Thorne 1937 (Sanwal 1957) Suborder Diplogasterina Paramonov 1952 Superfamily Cylindrocorporoidea T. Goodey 1939 Family Cylindrocorporidae T. Goodey 1939 Family Odontopharyngidae Micoletzky 1922 Superfamily Diplogasteroidea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Skrjabinema ''Skrjabinema'' is a genus of nematodes within the Oxyuridae family. Species of this genus typically parasitise ruminants. For example, the nematode '' Skrjabinema ovis'' invades the intestinal tract of the guanaco, ''Lama guanicoe The guanaco ( ; ''Lama guanicoe'') is a camelid native to South America, closely related to the llama. Guanacos are one of two wild South American camelids; the other species is the vicuña, which lives at higher elevations. Etymology The gua ...'', subsequent to the ingestion of eggs of this worm.C. Michael Hogan. 2008 Notes References * Chemical Institute of Canada. 1934. ''Canadian Journal of Research'', National Research Council of Canada, v.10 Jan-Jun * C. Michael Hogan. 2008''Guanaco: Lama guanicoe'', GlobalTwitcher.com, ed. N. Strömberg Oxyuridomorpha Rhabditida genera {{Rhabditida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Tree Of Life Web Project The Tree of Life Web Project (ToL) is an Internet project providing information about the diversity and phylogeny of life on Earth. This collaborative peer reviewed project began in 1995, and is written by biologists from around the world. The site has not been updated since 2011, however the pages are still accessible. The pages are linked hierarchically, in the form of the branching evolutionary tree of life, organized cladistically. Each page contains information about one particular group of organisms and is organized according to a branched tree-like form, thus showing hypothetical relationships between different groups of organisms. In 2009 the project ran into funding problems from the University of Arizona. Pages and Treehouses submitted took a considerably longer time to be approved as they were being reviewed by a small group of volunteers, and apparently, around 2011, all activities ended. History The idea of this project started in the late 1980s. David Maddison ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Family (biology) Family (, : ) 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". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Spiruria Spirurina is a suborder of nematode worms in the order Rhabditida. Spirurina contains a diverse group of worms that inhabit soil, water, and other bodies of organism. Footnotes References * Bowman, D. D. (2014). Georgis' parasitology for veterinarians. Elsevier Health Sciences. * Hawdon, J. M., & Schad, G. A. (1990). Trichinella and trichinosis. Oxford University Press. Spirurina, Parasitic nematodes of mammals Ecdysozoa subclasses {{parasitic animal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ascaridida Ascaridomorpha is an infraorder of parasitic roundworms in the order Rhabditida Rhabditida is an order of free-living, parasitic and microbivorous nematodes living in soil. The Cephalobidae, Panagrolaimidae, Steinernematidae, and Strongyloididae seem to be closer to the Tylenchia, regardless of whether these are merg .... References Nematode orders {{parasitic animal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]