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Dugesia
''Dugesia'' is a genus of freshwater planarians in the family Dugesiidae triclads and the type genus of this family. These common flatworms are found in freshwater habitats of Africa, Eurasia, and Australia. ''Dugesia'' is best known to non-specialists because of its regeneration capacities. Description ''Dugesia'' species have an elongated body with a slightly triangle-shaped head. They often have grey, brown, or black dorsal color, whereas the ventral surface is usually paler. These animals have a couple of eyes constituted by a multicellular pigmented cup with many retinal cells to detect the amount of light in the nearby environment. Sometimes they present supernumerary eyes. At the anterior part of the body, behind the eye level, they have a pair of structures called auricles that give the triangle look to the 'head' and allow them to detect the intensity of water current. These auricles are free of pigment and rhabdites. Each side of the anterior margin of the head has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugesia Creta
''Dugesia'' is a genus of freshwater planarians in the family Dugesiidae triclads and the type genus of this family. These common flatworms are found in freshwater habitats of Africa, Eurasia, and Australia. ''Dugesia'' is best known to non-specialists because of its regeneration (biology), regeneration capacities. Description ''Dugesia'' species have an elongated body with a slightly triangle-shaped head. They often have grey, brown, or black dorsal color, whereas the ventral surface is usually paler. These animals have a couple of eyes constituted by a multicellular pigmented cup with many retinal cells to detect the amount of light in the nearby environment. Sometimes they present supernumerary eyes. At the anterior part of the body, behind the eye level, they have a pair of structures called Planarian#Nervous system, auricles that give the triangle look to the 'head' and allow them to detect the intensity of water current. These auricles are free of pigment and rhabdites. Eac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugesia Ryukyuensis
''Dugesia'' is a genus of freshwater planarians in the family Dugesiidae triclads and the type genus of this family. These common flatworms are found in freshwater habitats of Africa, Eurasia, and Australia. ''Dugesia'' is best known to non-specialists because of its regeneration capacities. Description ''Dugesia'' species have an elongated body with a slightly triangle-shaped head. They often have grey, brown, or black dorsal color, whereas the ventral surface is usually paler. These animals have a couple of eyes constituted by a multicellular pigmented cup with many retinal cells to detect the amount of light in the nearby environment. Sometimes they present supernumerary eyes. At the anterior part of the body, behind the eye level, they have a pair of structures called auricles that give the triangle look to the 'head' and allow them to detect the intensity of water current. These auricles are free of pigment and rhabdites. Each side of the anterior margin of the head has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugesia Subtentaculata
''Dugesia subtentaculata'' is a species of planarian that inhabits the freshwater of Southern France, several localities on the Iberian Peninsula (including Catalonia), Mallorca, Morocco and Algeria. In 1986 De Vries designated a neotype for ''D. subtentaculata'' after the original type material was lost. She also synonymized the species ''D. iberica'', described from Mallorca and Iberian Peninsula, with ''D. subtentaculta''. Both the neotype and the holotype are from the surroundings of Montpellier Montpellier (; ) is a city in southern France near the Mediterranean Sea. One of the largest urban centres in the region of Occitania (administrative region), Occitania, Montpellier is the prefecture of the Departments of France, department of ..., from a locality where asexual specimens of ''D. subtentaculata'' and sexual individuals of '' D. gonocephala'' are found living together. Phylogeny ''Dugesia subtentaculata'' is related to other European ''Dugesia'' species. Howeve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugesia Sicula
''Dugesia sicula'' is a species of dugesiid triclad that lives in freshwater bodies of the Mediterranean Basin, where it is widely distributed. It has been reported from Sicily, Elba and Mallorca, Eivissa, Sardinia,Stocchino et al., 2005 G.A. Stocchino, G. Corso, R. Manconi, S. Casu and M. Pala, "Endemic freshwater planarians of Sardinia: Redescription of Dugesia hepta (Platyhelminthes, Tricladida) with a comparison of the Mediterranean species of the genus", ''Journal of Natural History'' 39 (2005), pp. 1947–1960. Algeria, Tunisia,Charni, M., Harrath, A. H., Sluys, R., Tekaya, S., and Zghal, F. (2004). "The freshwater planarian Dugesia sicula Lepori, 1948 (Platyhelminthes, Tricladida) in Tunisia: ecology, karyology, and morphology". ''Hydrobiologia'' 517, 161–170. MoroccoStocchino, G A., Manconi R., Corso G., Sluys R., Casu S., & Pala M., 2009. "African planarians: morphology and karyology of Dugesia maghrebiana sp. n. (Platyhelminthes, Tricladida) from Tunisia". ''Italian J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugesia Japonica
''Dugesia japonica'' is a species of freshwater planarian that inhabits freshwater bodies of East Asia, including Japan, Korea, Taiwan, China and north-eastern Siberia. However, molecular studies suggest that ''Dugesia japonica'' is polyphyletic A polyphyletic group is an assemblage that includes organisms with mixed evolutionary origin but does not include their most recent common ancestor. The term is often applied to groups that share similar features known as Homoplasy, homoplasies ... and different populations across its area of occurrence constitute distinct species. Phylogeny ''D. japonica'' position in relation with other ''Dugesia'' species after the work of Lázaro ''et al.'', 2009: Space Experimentation A study was published in 2017 in which a ''Dugesia Japonica'' trunk fragment had been sent into space, and grew with two heads, one on either end of the trunk. However, the influence of space conditions on this phenomenon is debated. References {{Taxonbar, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugesia Notogaea
''Dugesia notogaea'' is a species of dugesiid triclad that inhabits freshwater bodies of north Queensland, Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ....Sluys, R.; Kawakatsu, M. 2001: Contribution to an inventory of the freshwater planarians of Australia and New Zealand (Platyhelminthes, Tricladida, Dugesiidae), with distribution maps of the species examined. Beaufortia, 51: 163-198 Phylogeny ''D. notogaea'' position in relation with other ''Dugesia'' species after the work of Lázaro ''et al.'', 2009: References External links ''Dugesia notogaea'' in the Encyclopedia of Life {{Taxonbar, from=Q2896653 Notogaea Animals described in 1998 Endemic fauna of Australia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugesiidae
Dugesiidae is a family of freshwater planarians distributed worldwide (except Antarctica). The type genus is ''Dugesia ''Dugesia'' is a genus of freshwater planarians in the family Dugesiidae triclads and the type genus of this family. These common flatworms are found in freshwater habitats of Africa, Eurasia, and Australia. ''Dugesia'' is best known to non-spe ...'' Girard, 1850. Description All species of Dugesiidae live in freshwater environments and have a dorsoventrally flattened body. The head usually has a somewhat triangular shape and has two eyes (except for some subterranean eyeless species). The main differences between Dugesiidae and other freshwater planarians are related to the anatomy of the eyes and the copulatory apparatus. The eye cup in Dugesiidae is composed of several retinal cells, while in other freshwater planarians they are composed of a single cell. All freshwater planarians have an accessory organ called copulatory bursa or ''bursa copulatrix'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugesia Aethiopica
''Dugesia aethiopica'' is a species of freshwater dugesiid planarian found in Lake Tana in Ethiopia.Tyler, S., Artois, T.; Schilling, S.; Hooge, M.; Bush, L.F. (eds) (2006-2022). World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora''Dugesia aethiopica'' Stocchino, Corso, Manconi & Pala, 2002 Accessed 2023-06-25. Etymology The specific epithet of ''aethiopica'' refers to the type-locality, within the country of Ethiopia Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a landlocked country located in the Horn of Africa region of East Africa. It shares borders with Eritrea to the north, Djibouti to the northeast, Somalia to the east, Ken ....Giacinta Angela Stocchino, Gavina Corso, Renata Manconi & Maria Pala (2002) African planarians: ''Dugesia aethiopica'' sp. n. (Platyhelminthes, Tricladida) from lake Tana (NW Ethiopia). ''Italian Journal of Zoology'', 69:1, 45-51. Description ''Dugesia aethiopica'' is about 20–22 mm lon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triclad
Planarians (triclads) are free-living flatworms of the class Turbellaria, order Tricladida, which includes hundreds of species, found in freshwater, marine, and terrestrial habitats.pp 3., "Planarians (the popular name for the group as a whole), or triclad flatworms (the more scientific designation of the same group), are acoelomate bilaterians". Planarians are characterized by a three-branched intestine, including a single anterior and two posterior branches. Their body is populated by adult stem cells called neoblasts, which planarians use for regenerating missing body parts. Many species are able to Regeneration (biology), regenerate any missing organ, which has made planarians a popular model in research of regeneration and stem cell biology. The genome sequences of several species are available, as are tools for molecular biology analysis. The order Tricladida is split into three suborders, according to their phylogenetic relationships: Maricola, Dimarcusidae, Cavernicola ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Girardia
''Girardia'' is a genus of freshwater Tricladida, planarians belonging to the family Dugesiidae. Distribution The genus ''Girardia'' is endemic to the Americas, from Argentina to Canada, although most species occur in South America. The only two species known to occur naturally in North America, ''Girardia tigrina'' and ''Girardia dorotocephala'', have been introduced in other continents and islands. Description Species of ''Girardia'' are very similar to species of other genera of Dugesiidae and few apomorphy, apomorphies that clearly define the genus are known. One of the few exclusive characteristics is the presence of pigment granules in the outer pharyngeal wall. Until 1991 ''Girardia'' was considered a subgenus of ''Dugesia'', then it was upgraded to the genus rank. However, some works continued to use the old genus for some ''Girardia'' species, mainly for ''Girardia dorotocephala'' and ''Girardia tigrina''. Species *''Girardia alba'' *''Girardia anceps'' *''Girardia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
