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Dorylaimia
Dorylaimia is a subclass of nematodes. Description In general, members of subclass Dorylaimia exhibit a great diversity of terrestrial and freshwater species, most of which are large predators or omnivorous free-living species. Some are plant parasites, whereas others are animal parasites (Trichinellida and Mermithida). No members of the Dorylaimia are found in marine habitats. Dorylaimia bear an odontostyle, a protrusible, hollow, needlelike tooth for puncturing and emptying food items. Taxonomy Phylogenetic analysis of phylum Nematoda suggests three distinct basal clades, the dorylaims, enoplids, and chromadorids. These represent Clades I, II and C+S of Blaxter (1998). Of these, the first two appear to have sister clade status, allowing resolution into two classes, Enoplea and Chromadorea, and division of the former into two subclasses corresponding to Clades I and II respectively, the Enoplia and Dorylaimia. Nevertheless, the possibility remains that Dorylaimia will even ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enoplea
Enoplea (enopleans) is a Class (biology), class, which with the classes SecernenteaTree of Life Web Project (ToL) (2002)Nematoda Version of January 1, 2002. Retrieved November 2, 2008. and Chromadorea make up the phylum Nematode, Nematoda in current taxonomy (biology), taxonomy. The Enoplea are considered to be a more ancestral group than the Chromadorea, and researchers have referred to its members as the "ancestrally diverged nematodes", compared to the "more recently diverged nematodes" of Chromadorea. Description The Enoplea are distinguished from the Chromadorea by a number of characteristics. The enoplean esophagus is cylindrical or "bottle-shaped", compared to the bulbous chromadorean esophagus. Enopleans have pocket-like amphids, while chromadoreans have amphids shaped like slits, pores, coils, or spirals. An enoplean is smooth or marked with fine lines, while a chromadorean may have rings, projections, or setae. The enoplean excretory system is simple, sometimes made up ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Mermithida
Mermithida is an order of 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 (h ... worms. The order includes two families, and most members are endoparasites on arthropods. One of the morphological characteristics of the order is the presence of a stichosome.Chitwood, B. G. & Chitwood, M. B. (1950). Introduction to Nematology (Vol. 1). Baltimore: Monumental Printing Co.Z. X. Chen, D. W. Dickson (eds.) (2004) Nematology: Nematode Management and Utilization. CABI Publishing. p. 847 References Enoplea Parasitic nematodes of animals Nematode orders Taxa named by Libbie Henrietta Hyman {{Enoplea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sister Clade
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC. The whole clade ABC is itself a subtree of a larger tree which offers yet more sister group relationships, both among the leaves and among larger, more deeply rooted clades. The tree structure shown connects through its root to the rest of the universal tree of life. In cladistic standards, taxa A, B, and C may represent specimens, species, genera, or any other taxonomic units. If A and B are at the same taxonomic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muspiceida
Muspiceida is an order of nematodes belonging to the class Enoplea Enoplea (enopleans) is a Class (biology), class, which with the classes SecernenteaTree of Life Web Project (ToL) (2002)Nematoda Version of January 1, 2002. Retrieved November 2, 2008. and Chromadorea make up the phylum Nematode, Nematoda in cur .... Families: * Muspiceidae Brumpt, 1920 * Robertdollfusiidae Chabaud & Campana, 1950 References {{Taxonbar, from=Q20055309 Nematode orders Enoplea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enoplia
The Enoplia are a subclass of nematodes in the class Enoplea. Description Enoplians are characterized by amphids shaped like ovals, stirrups, or pouches. Their bodies are smooth, without rings or lines. The esophagus is cylindrical and glandular.Subclass Enoplia. Nemaplex: Nematode-Plant Expert Information System. University of California, Davis. Version July 26, 2012. Taxonomy Lorenzen described two , Enoplida and Trefusiida, in the 1980s based on morphology. With the advent of , a reorganisation has been ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triplonchida
Triplonchida is an order of terrestrial 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 (h ...s, and is one of two orders making up the subclass Enoplia.Phylum Nematoda: Triplochida Nematode Classification. Department of Nematology. University of California, Riverside. Nemaplex: Nematode-Plant Expert Information System. University of California, Davis. Version October 9, 2012. Taxonomy There are three suborders: *[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enoplids
Enoplida is an order (biology), order of nematodes. It is one of two orders in Enoplia, which is one of two subclasses in Class Enoplea.Class Enoplea. Nemaplex: Nematode-Plant Expert Information System. University of California, Davis. Version October 9, 2012. Nematode Classification. Department of Nematology. University of California, Riverside. These nematodes are mostly free-living marine (ocean), marine animals. Most feed on diatoms and other algaes. Subdivisions Upon Molecular phylogenetics, phylogenetic analysis in 2010, the order was divided into five clades. Clades and selected family (biology), families include: *Clade ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
