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Novomitchellia
Dimarcusidae is a family of triclads found mostly in freshwater habitats of caves, although at least one species, '' Rhodax evelinae'', occurs in surface waters. Currently the family contains only seven species distributed in five genera, although the total number of species is thought to be much higher. Description The morphological features uniting species of Dimarcusidae are related to the reproductive system. Their ovaries are located more posteriorly than in most triclads, which usually have them close to the brain. The penis in species of Dimarcusidae contains glandular elements and the common ovovitelline duct is perpendicular to the female genital duct. Taxonomy The family Dimarcusidae was erected in 1972 by Mitchell and Kawakatsu to include a new species, ''Dimarcus villalobosi''. However, the same species had been briefly described by Benazzi in the same year as ''Opisthobursa mexicana'' and this name had priority, with ''Dimarcus villalobosi'' becoming a junior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opisthobursa Mexicana
Dimarcusidae is a family of triclads found mostly in freshwater habitats of caves, although at least one species, '' Rhodax evelinae'', occurs in surface waters. Currently the family contains only seven species distributed in five genera, although the total number of species is thought to be much higher. Description The morphological features uniting species of Dimarcusidae are related to the reproductive system. Their ovaries are located more posteriorly than in most triclads, which usually have them close to the brain. The penis in species of Dimarcusidae contains glandular elements and the common ovovitelline duct is perpendicular to the female genital duct. Taxonomy The family Dimarcusidae was erected in 1972 by Mitchell and Kawakatsu to include a new species, ''Dimarcus villalobosi''. However, the same species had been briefly described by Benazzi in the same year as '' Opisthobursa mexicana'' and this name had priority, with ''Dimarcus villalobosi'' becoming a junior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodax
Dimarcusidae is a family of triclads found mostly in freshwater habitats of caves, although at least one species, '' Rhodax evelinae'', occurs in surface waters. Currently the family contains only seven species distributed in five genera, although the total number of species is thought to be much higher. Description The morphological features uniting species of Dimarcusidae are related to the reproductive system. Their ovaries are located more posteriorly than in most triclads, which usually have them close to the brain. The penis in species of Dimarcusidae contains glandular elements and the common ovovitelline duct is perpendicular to the female genital duct. Taxonomy The family Dimarcusidae was erected in 1972 by Mitchell and Kawakatsu to include a new species, ''Dimarcus villalobosi''. However, the same species had been briefly described by Benazzi in the same year as '' Opisthobursa mexicana'' and this name had priority, with ''Dimarcus villalobosi'' becoming a junior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opisthobursa
Dimarcusidae is a family of triclads found mostly in freshwater habitats of caves, although at least one species, '' Rhodax evelinae'', occurs in surface waters. Currently the family contains only seven species distributed in five genera, although the total number of species is thought to be much higher. Description The morphological features uniting species of Dimarcusidae are related to the reproductive system. Their ovaries are located more posteriorly than in most triclads, which usually have them close to the brain. The penis in species of Dimarcusidae contains glandular elements and the common ovovitelline duct is perpendicular to the female genital duct. Taxonomy The family Dimarcusidae was erected in 1972 by Mitchell and Kawakatsu to include a new species, ''Dimarcus villalobosi''. However, the same species had been briefly described by Benazzi in the same year as ''Opisthobursa mexicana'' and this name had priority, with ''Dimarcus villalobosi'' becoming a junior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Novomitchellia
Dimarcusidae is a family of triclads found mostly in freshwater habitats of caves, although at least one species, '' Rhodax evelinae'', occurs in surface waters. Currently the family contains only seven species distributed in five genera, although the total number of species is thought to be much higher. Description The morphological features uniting species of Dimarcusidae are related to the reproductive system. Their ovaries are located more posteriorly than in most triclads, which usually have them close to the brain. The penis in species of Dimarcusidae contains glandular elements and the common ovovitelline duct is perpendicular to the female genital duct. Taxonomy The family Dimarcusidae was erected in 1972 by Mitchell and Kawakatsu to include a new species, ''Dimarcus villalobosi''. However, the same species had been briefly described by Benazzi in the same year as ''Opisthobursa mexicana'' and this name had priority, with ''Dimarcus villalobosi'' becoming a junior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodax Evelinae
Dimarcusidae is a family of triclads found mostly in freshwater habitats of caves, although at least one species, '' Rhodax evelinae'', occurs in surface waters. Currently the family contains only seven species distributed in five genera, although the total number of species is thought to be much higher. Description The morphological features uniting species of Dimarcusidae are related to the reproductive system. Their ovaries are located more posteriorly than in most triclads, which usually have them close to the brain. The penis in species of Dimarcusidae contains glandular elements and the common ovovitelline duct is perpendicular to the female genital duct. Taxonomy The family Dimarcusidae was erected in 1972 by Mitchell and Kawakatsu to include a new species, ''Dimarcus villalobosi''. However, the same species had been briefly described by Benazzi in the same year as ''Opisthobursa mexicana'' and this name had priority, with ''Dimarcus villalobosi'' becoming a junior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balliania
Dimarcusidae is a family of triclads found mostly in freshwater habitats of caves, although at least one species, ''Rhodax evelinae'', occurs in surface waters. Currently the family contains only seven species distributed in five genera, although the total number of species is thought to be much higher. Description The morphological features uniting species of Dimarcusidae are related to the reproductive system. Their ovaries are located more posteriorly than in most triclads, which usually have them close to the brain. The penis in species of Dimarcusidae contains glandular elements and the common ovovitelline duct is perpendicular to the female genital duct. Taxonomy The family Dimarcusidae was erected in 1972 by Mitchell and Kawakatsu to include a new species, ''Dimarcus villalobosi''. However, the same species had been briefly described by Benazzi in the same year as ''Opisthobursa mexicana'' and this name had priority, with ''Dimarcus villalobosi'' becoming a junior s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hausera Hauseri
''Hausera'' is a subterranean genus of planarian from Brazil. It contains only the single species ''Hausera hauseri''. It is the first cave-dwelling member of the suborder Cavernicola to have been observed in South America. Etymology Both the genus and species were named after Josef Hauser, a researcher of freshwater flatworms. Description Specimens are long and wide. The pharynx is long, and along with the gonopore is located in the hindmost third of the body. While it lacks eyes, the head has a pair of ciliated sensory organs approximately 140 µm back from the body's anterior end. The intestine extends into the brain and connects with the reproductive system via a genito-intestinal duct. The testicular follicles are arranged in uneven rows near the margins of the body, and the ovaries are located behind but in proximity to the brain, approximately 0.6 millimeters behind the body's tip. The species is colorless. Range and habitat ''Hausera hauseri'' was found in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maricola
Maricola is a suborder of triclad flatworms including species that mainly inhabit salt water environments. However, some species are also known from freshwater or brackish waters.Ball, I. R. 1974. La Faune Terrestre de l'Ile de Saint Hélène: Turbellaria Tricladida. Ann. Mus. Roy. Afr. Centrale, in 8. Zool. Taxonomy and phylogeny History The Maricola group was first proposed by Hallez in 1892. He recognized three families: Otoplanida, Procerodida and Bdellourida. Two years later, in 1884, Hallez renamed these families as Otoplanidae, Procerodidae and Bdellouridae. In 1906 Böhmig classified the Maricola in two families and five subfamilies: Procerodidae (Euprocerodinae, Cercyrinae, Micropharynginae) and Bdellouridae (Uteriporinae, Eubdellourinae). In 1909 Wilhelmi wrote a monograph on the group in which five families were described: Procerodidae, Uteriporidae, Cercyridae, Bdellouridae, Micropharyngidae. Von Graff used the same classification in 1916. In 1989 Sluys recognize ... [...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] |
Robert Wetsel Mitchell
The name Robert is an ancient Germanic given name, from Proto-Germanic "fame" and "bright" (''Hrōþiberhtaz''). Compare Old Dutch ''Robrecht'' and Old High German ''Hrodebert'' (a compound of '' Hruod'' ( non, Hróðr) "fame, glory, honour, praise, renown" and ''berht'' "bright, light, shining"). It is the second most frequently used given name of ancient Germanic origin. It is also in use as a surname. Another commonly used form of the name is Rupert. After becoming widely used in Continental Europe it entered England in its Old French form ''Robert'', where an Old English cognate form (''Hrēodbēorht'', ''Hrodberht'', ''Hrēodbēorð'', ''Hrœdbœrð'', ''Hrœdberð'', ''Hrōðberχtŕ'') had existed before the Norman Conquest. The feminine version is Roberta. The Italian, Portuguese, and Spanish form is Roberto. Robert is also a common name in many Germanic languages, including English, German, Dutch, Norwegian, Swedish, Scots, Danish, and Icelandic. It can be use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hausera Hauseri CA
''Hausera'' is a subterranean genus of planarian from Brazil. It contains only the single species ''Hausera hauseri''. It is the first cave-dwelling member of the suborder Cavernicola to have been observed in South America. Etymology Both the genus and species were named after Josef Hauser, a researcher of freshwater flatworms. Description Specimens are long and wide. The pharynx is long, and along with the gonopore is located in the hindmost third of the body. While it lacks eyes, the head has a pair of ciliated sensory organs approximately 140 µm back from the body's anterior end. The intestine extends into the brain and connects with the reproductive system via a genito-intestinal duct. The testicular follicles are arranged in uneven rows near the margins of the body, and the ovaries are located behind but in proximity to the brain, approximately 0.6 millimeters behind the body's tip. The species is colorless. Range and habitat ''Hausera hauseri'' was found in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
