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Rhynchodemini
Rhynchodemini is a tribe of land planarians in the subfamily Rhynchodeminae. Description The tribe Rhynchodemini is defined as containing land planarians with an elongate, cylindroid form, two eyes near the anterior end and strong subepithelial musculature in which the longitudinal fibers are grouped into large bundles. The copulatory apparatus lacks a penis papilla or has it greatly reduced. Genera The tribe Rhynchodemini contains six genera: *'' Anisorhynchodemus'' Kawakatsu, Froehlich, Jones, Ogren & Sasaki, 2003 *'' Cotyloplana'' Spencer, 1892 *'' Digonopyla'' Fischer, 1926 *'' Dolichoplana'' Moseley, 1877 *''Platydemus'' von Graff, 1896 *''Rhynchodemus ''Rhynchodemus'' is a genus of land planarians Geoplanidae is a family of flatworms known commonly as land planarians or land flatworms. These flatworms are mainly predators of other invertebrates, which they hunt, attack and capture using ph ...'' Leidy, 1851 References {{Taxonbar, from=Q21214699 Geoplanidae [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchodeminae
Rhynchodeminae is a subfamily of land planarians with a worldwide distribution. Phylogeny and systematics Based on morphological evidence, especially the presence of a single pair of eyes, the subfamily Rhynchodeminae initially encompassed only the species in the current tribe Rhynchodemini and was considered the sister group of subfamily Microplaninae.Ogren, R. E. and Kawakatsu, M. (1988). ''Index to the species of the family Rhynchodemidae (Turbellaria, Tricladida, Terricola) Part I: Rhynchodeminae.'' Bulletin of Fujis Women's College. 26: 39-91. The remaining tribes were considered closely related to the subfamily Geoplaninae due to the presence of multiple eyes along the body. However, molecular studies revealed that this classification was artificial and that the Rhynchodeminae were closely related to Caenoplaninae. Therefore, recent classification puts the former Rhynchodeminae as a tribe, Rynchodemini, inside an expanded subfamily Rhynchodeminae that also contains the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anisorhynchodemus
''Anisorhynchodemus'' is a genus of land planarians of the tribe Rhynchodemini Rhynchodemini is a tribe of land planarians in the subfamily Rhynchodeminae. Description The tribe Rhynchodemini is defined as containing land planarians with an elongate, cylindroid form, two eyes near the anterior end and strong subepithelia .... It was erected to include species lacking sufficient morphological information to allow them to be classified in the appropriate genus. Taxonomy Many species of land planarians described during the second half of the 19th century and the first half of the 20th century were classified based solely on external characters. Currently, land planarian genera are highly based on internal anatomy, especially the anatomy of the copulatory apparatus. Consequently, species with old descriptions that were never redescribed, so that their internal anatomy remains unknown, cannot be assigned to the correct genus. Thus, the genus ''Anisorhynchodemus'' was erected ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cotyloplana
''Cotyloplana'' is a genus of land planarians in the tribe Rhynchodemini Rhynchodemini is a tribe of land planarians in the subfamily Rhynchodeminae. Description The tribe Rhynchodemini is defined as containing land planarians with an elongate, cylindroid form, two eyes near the anterior end and strong subepithelia .... Description The genus ''Cotyloplana'' is characterized by a flat body with a wide creeping sole. There is one sucker located ventrally at the anterior end, in front of the creeping sole. The copulatory apparatus has a large spacious male atrium, with a small and obtuse penis papilla. A diverticulum opens into the common atrium from its posterior wall. Species The genus ''Cotyloplana'' currently contains two species: * '' Cotyloplana borneensis'' de Beauchamp, 1933 * '' Cotyloplana pilcata'' Whitehouse, 1914 * '' Cotyloplana punctata'' Spencer, 1892 References {{Taxonbar, from=Q18582704 Geoplanidae Rhabditophora genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digonopyla
''Digonopyla'' is a monotypic genus of land planarians in the tribe Rhynchodemini Rhynchodemini is a tribe of land planarians in the subfamily Rhynchodeminae. Description The tribe Rhynchodemini is defined as containing land planarians with an elongate, cylindroid form, two eyes near the anterior end and strong subepithelia .... It contains a single species, ''Digonopyla harmeri''. Description ''Digonopyla harmeri'' is characterized by the presence of numerous pharynges and mouths. The copulatory apparatus has a wall of tissue separating the male and female atria that results in independent male and female openings, an unusual condition in land planarians. References {{Taxonbar, from=Q18592617 Geoplanidae Rhabditophora genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolichoplana
''Dolichoplana'' is a genus of land planarians in the tribe Rhynchodemini. Description Species of the genus ''Dolichoplana'' are characterized by a very elongate and flattened body with creeping sole of moderate width. The anterior end is rounded and slightly concave, bordered by glandular and sensory tracts, and has two large eyes. The parenchymal longitudinal musculature is restricted to the ventral region. The copulatory apparatus has a long and folded chamber in the male atrium, without a penis papilla. A prominent diverticulum opens into the common atrium from its posterior wall. Species The genus ''Dolichoplana'' currently contains three species: * ''Dolichoplana carvalhoi'' Corrêa, 1947 * ''Dolichoplana striata'' Moseley, 1877 * ''Dolichoplana vircata ''Dolichoplana'' is a genus of land planarians in the tribe Rhynchodemini. Description Species of the genus ''Dolichoplana'' are characterized by a very elongate and flattened body with creeping sole of moder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platydemus
''Platydemus'' is a genus of large predatory land planarians in the tribe Rhynchodemini. Description Species of the genus ''Platydemus'' are characterized by a massive, slightly convex body with a broad creeping sole and very large eyes. The copulatory apparatus has a large chamber with folded epithelium in the male atrium, usually with a small penis. Species The genus ''Platydemus'' includes the following species: * '' Platydemus bivittatus'' von Graff, 1899 * '' Platydemus fasciatus'' (Spencer, 1892) * '' Platydemus grandis'' (Spencer, 1892) * '' Platydemus joliveti'' de Beauchamp, 1972 * '' Platydemus lividus'' von Graff, 1899 * '' Platydemus longibulbus'' de Beauchamp, 1972 * '' Platydemus macrophthalmus'' von Graff, 1899 * ''Platydemus manokwari ''Platydemus manokwari'', also known as the New Guinea flatworm, is a species of large predatory land flatworm. Native to New Guinea, it has been accidentally introduced to the soil of many countries, including the Un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchodemus
''Rhynchodemus'' is a genus of land planarians Geoplanidae is a family of flatworms known commonly as land planarians or land flatworms. These flatworms are mainly predators of other invertebrates, which they hunt, attack and capture using physical force and the adhesive and digestive proper ... in the tribe Rhynchodemini. Description Species of the genus ''Rhynchodemus'' are characterized by an elongate body that is attenuated at both ends, oval or round in cross section. The creeping sole occupies most of the ventral surface and the anterior end has two large eyes. The copulatory apparatus has a large chamber with folded epithelium in the male atrium, without a penis papilla. Species The genus ''Rhynchodemus'' includes the following species: * '' Rhynchodemus americanus'' Hyman, 1943 * '' Rhynchodemus angustus'' (Hyman, 1941) * '' Rhynchodemus aripensis'' Prudhoe, 1949 * '' Rhynchodemus blainvillei'' von Graff, 1899 * '' Rhynchodemus bromelicola'' de Beauchamp, 1912 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Land Planarians
Geoplanidae is a family of flatworms known commonly as land planarians or land flatworms. These flatworms are mainly predators of other invertebrates, which they hunt, attack and capture using physical force and the adhesive and digestive properties of their mucus. They lack water-retaining mechanisms and are therefore very sensitive to humidity variations of their environment. Because of their strict ecological requirements, some species have been proposed as indicators of the conservation state of their habitats. They are generally animals with low vagility (dispersal ability) and with very specific habitat requirements, so they can be also used to accurately determine the distribution of biogeographic realms. Today the fauna of these animals is being studied to select conservation priorities in the Atlantic rainforest in Brazil. At the other extreme, one species in this family, ''Platydemus manokwari'' has become an invasive species in both disturbed and wild habitats in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproductive System Of Planarians
The reproductive system of planarians is broadly similar among different families, although the associated structures can vary in complexity. All planarians are hermaphrodites, so their reproductive system has a male and a female part. Both parts communicate with the surface of the body via a single opening called gonopore, which is located on the ventral side of the posterior half of the body. Male part of the reproductive system The male part of the reproductive system in planarians has a set of several testicles, distributed throughout the body in two or more rows. They are usually concentrated in the anterior two thirds of the body, although they can reach close to the posterior end. The testicles are connected to a pair of sperm ducts which run posteriorly towards the gonopore. In some groups, the sperm ducts met in their distal part, forming the ejaculatory duct, which then opens in a cavity called “male atrium”. In others, like land planarians, both open in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
