Description
(
Inglês
)
fornecido por AmphibiaWeb articles
It is a typhlonectid with a body length between 99 and 530 mm and 70 to 80 incomplete primary body annuli. Secondary annulli are absent, and the skin is smooth. The dorsum is bright black, the venter is black-gray, and both are covered with minute white spots. In addition, The tentacle and the eye are surrounded by a whitish area which can or cannot be continuous. The disc area surrounding the vent is cream-white. The nostrils are dorsolateral and closer to the snout than to the eyes, and the tentacle extrudes midway between the eye and the snout. The skull is similar to that ot other typhlonectids, but with an open tentacular groove that crosses the maxillopalatine. The quadrate and pterygoid are completely fused.
Gudynas, E. and Williams, J. D. (1963). ''Chthonerpeton indistinctum (Reinhardt and Luetken).'' Catalogue of American Amphibians and Reptiles. American Society of Ichthyologists and Herpetologists, 531.1-531.2.
- autor
- Franziska Sandmeier
Distribution and Habitat
(
Inglês
)
fornecido por AmphibiaWeb articles
C. indistinctum is found in temperate South America, in the Rio de la Plata basin and in drainages along the adjacent coasts.
- autor
- Franziska Sandmeier
Distribution
(
Inglês
)
fornecido por IABIN
Found in in the Rio de la Plata basin and in drainages along the adjacent coasts. In Argentina the species occurs in the Buenos Aires province of the Atlantic coast, and at localities adjacent to the Rio Paraná in Entre Rios, Santa Fé,Corrientes, and Chaco provinces. In Brasil most of the records are from Rio Grande do Sul state (Atlantic coast, Lagoa dos Patos - Rio Jacui basin), and a few records are from Paraná and Santa Catarina states. In Paraguay from a only locality in Misiones department. In Uruguay the species has been collected in the Rio de la Plata and on the Atlantic Ocean coast, with an isolated record from the mainland.
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- Museo Nacional de Historia Natural
- autor
- Esteban O. Lavilla
- editor
- Diego Arrieta
Brief Summary
(
Inglês
)
fornecido por IABIN
Diagnosis A species having a total length from 99 to 530 mm. The skin is smooth; primary annuli are incomplete at the dorsal and ventral midlines and their number shows lower varation (extremes 70-81 for adults); secondary annuli are absent. Head dorso-ventrally compressed; prominent snout projecting beyond the mouth; nostrils oval, directed dorsolaterally and clearly closer to the snow than the eyes. Tentacle in a white area that projects posteriorly to the eye and is in contact with it or not. The bead is wider posteriorly and the distance between the eyes is greater than that between the nostrils. Body width is greatest at the middle of the body, followed by the width at the neck and is smallest at the terminal tip.
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- cc-by-nc-sa-3.0
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- Museo Nacional de Historia Natural
- autor
- Esteban O. Lavilla
- editor
- Diego Arrieta
Diagnostic Description
(
Inglês
)
fornecido por IABIN
Description of the lectotype The eye is rather large, very distinct, the distance between eyes (4.9 mm) greater than the snout length from the front level of the eyes to the tip; the snout projecting 2.2 mm beyond mouth. Nostrils slightly elongated ovals, not or scarcely visible from directly above head. The tentacle emerges a little below the direct line between eye and nostril, closer to the nostril (1.5 mm) than to the eye (2.1 mm). The two collars are rather poorly delineated by the three nuchal grooves. The latter are moderately distinct laterally but very dim dorsally. The two collars are fused together above, the second is joined to the first primary above and below. There are no transverse grooves on the collars. (A vague line is indicated on one collar, but this would appear to be merely a wrinkle.) Following the collars there are 74 primary annuli and no secondaries, the body ending in an unsegmented "shield" about 9 mm long, on the underside of which is the circular vent; it is surrounded by a series of eleven elongated denticles, the area not depressed (normally depressed?). No anal glands are distinguishable. Terminus of the body is rather narrowed, the diameter at vent much less than the width of the body (6.4 mm). There are no scales. The folds are narrowly incomplete above and below throughout the body (an occasional annulus may appear to be complete on the venter). Dentition: The teeth are in four series, the splenial being much reduced. Premaxillary-maxillary teeth, 16-1-17; prevomeropalatine, 15-1-15; dentary, 13-14; splenial, 2-2. The dentaries are somewhat larger than the maxillaries, which in turn are larger than the other teeth. The choanae are large (with valves), the transverse diameter of one being a little less than the distance between them. The tongue has been largely destroyed. Measurements in mm: Total length, 281; body width at vent, 6.4; width of body (middle), 11; width of head (greatest), 8.3; tip of snout to first nuchal groove (lateral measurement), 10; to second, 14.2; to third, 19; width in length, about 25.5 times. Variation There is a slight increase in the number of teeth in the various series from youth to old age. Perhaps some of the dental variation is actually the result of failure to count correctly the temporarily absent teeth, although an effort was made to do so. It is possibly due to geographic variation. The relationship of length to body width varies markedly, especially in gravid females. When not gravid they may differ but little in proportions from equal-sized males. The position of the tentacular opening with relation to the eye and the nostril shows little or no variation in adult specimens, the nostril being definitely closer to it than the eye. In the very young, the tentacle, when it first appears, may be closer to the eye but gradually moves farther from the eye. Thus at one time it may be equidistant from them. One point should be stressed: the measurement should be made from the pupil of the eye rather than from the edge of the larger white spot. Failure to do this would of course change the proportions. The two nuchal collars are usually indistinct in this species, as are the three nuchal grooves that ordinarily delineate them. Two small anal glands are evident externally on the anal "disc" of many if not all of the males. I am not wholly certain that these glands are invariably absent in females, although the glands are not visible in females examined. Variation in the number of annuli posterior to the two collars is not great (70-81).
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- cc-by-nc-sa-3.0
- direitos autorais
- Museo Nacional de Historia Natural
- autor
- Esteban O. Lavilla
- editor
- Diego Arrieta
Conservation Status
(
Inglês
)
fornecido por IABIN
LC. Least Concern.
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- cc-by-nc-sa-3.0
- direitos autorais
- Museo Nacional de Historia Natural
- autor
- Esteban O. Lavilla
- editor
- Diego Arrieta
Chthonerpeton indistinctum
(
Catalão; Valenciano
)
fornecido por wikipedia CA
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Chthonerpeton indistinctum
(
Inglês
)
fornecido por wikipedia EN
Chthonerpeton indistinctum is a species of caecilian in the family Typhlonectidae. It is found in northeastern Argentina, Paraguay, Uruguay, and southeastern Brazil. The common name Argentine caecilian has been coined for it.[2]
Description
Chthonerpeton indistinctum is a snakelike amphibian with no limbs. It can grow to about 53 cm (21 in). The body has 70 to 80 transverse folds, giving it a segmented appearance. The head has a pair of sensory tentacles between the nostrils and the eyes, and this area of skin is white. The body is black above and dark grey beneath, both with tiny white flecks. The flat, disc-like area surrounding the cloaca is creamy white.[3]
Distribution and habitat
C. indistinctum is found in Paraguay, Uruguay, Brazil and Argentina at altitudes ranging up to 1,000 m (3,300 ft). It is partially terrestrial and partly aquatic, possibly having annual migrations. When on land, it mostly stays close to the river bank, but occasionally ventures some way from water. Occasionally, it gets washed out to sea on mats of vegetation and has been found alive in the brackish water of estuaries. It is a common species, sometimes occurring in very large numbers, and the IUCN Red List of Threatened Species lists it as being of "Least Concern".[1]
Biology
This species is viviparous, giving birth to live young.[1]
It is considered to have several characteristics which indicate it is more primitive than other, more highly derived species. As caecilians evolved, their chromosomes are thought to have reduced in number. A number of species were karyotyped, and C. indistinctum was found to have a diploid number of 20 as against one of 28 for the more derived Typhlonectes compressicauda, an unexpected result. Further study is expected to clarify the taxonomic relationships between different species of caecilians.[4]
References
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Chthonerpeton indistinctum: Brief Summary
(
Inglês
)
fornecido por wikipedia EN
Chthonerpeton indistinctum is a species of caecilian in the family Typhlonectidae. It is found in northeastern Argentina, Paraguay, Uruguay, and southeastern Brazil. The common name Argentine caecilian has been coined for it.
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Chthonerpeton indistinctum
(
Espanhol; Castelhano
)
fornecido por wikipedia ES
Chthonerpeton indistinctum es una especie de anfibio gimnofione de la familia Caeciliidae.
Habita en la zona centrooriental de Argentina (sobre todo en la parte correspondiente a la cuenca del Paraná, en el estado de Santa Catarina (Brasil), en el departamento de Itapúa (Paraguay) y en los departamentos de Canelones, Colonia, Durazno, Maldonado, Montevideo, Rocha y San José (Uruguay).
Se halla a una altitud de 20 a 1000 msnm.
Sus hábitats naturales incluyen bosques templados, ríos, pantanos, marismas de agua dulce, corrientes intermitentes de agua dulce, pastos, zonas de irrigación, tierras agrarias inundadas en algunas estaciones y canales y diques.
La pérdida de su hábitat natural constituye una seria amenaza para las poblaciones de esta especie.
Referencias
Bibliografía
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Chthonerpeton indistinctum: Brief Summary
(
Espanhol; Castelhano
)
fornecido por wikipedia ES
Chthonerpeton indistinctum es una especie de anfibio gimnofione de la familia Caeciliidae.
Habita en la zona centrooriental de Argentina (sobre todo en la parte correspondiente a la cuenca del Paraná, en el estado de Santa Catarina (Brasil), en el departamento de Itapúa (Paraguay) y en los departamentos de Canelones, Colonia, Durazno, Maldonado, Montevideo, Rocha y San José (Uruguay).
Se halla a una altitud de 20 a 1000 msnm.
Sus hábitats naturales incluyen bosques templados, ríos, pantanos, marismas de agua dulce, corrientes intermitentes de agua dulce, pastos, zonas de irrigación, tierras agrarias inundadas en algunas estaciones y canales y diques.
La pérdida de su hábitat natural constituye una seria amenaza para las poblaciones de esta especie.
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- cc-by-sa-3.0
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- Autores y editores de Wikipedia
Chthonerpeton indistinctum
(
Basco
)
fornecido por wikipedia EU
(RLQ=window.RLQ||[]).push(function(){mw.log.warn("Gadget "ErrefAurrebista" was not loaded. Please migrate it to use ResourceLoader. See u003Chttps://eu.wikipedia.org/wiki/Berezi:Gadgetaku003E.");});
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Chthonerpeton indistinctum: Brief Summary
(
Basco
)
fornecido por wikipedia EU
Chthonerpeton indistinctum Chthonerpeton generoko animalia da. Anfibioen barruko Typhlonectidae familian sailkatuta dago, Gymnophiona ordenan.
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Chthonerpeton indistinctum
(
Francês
)
fornecido por wikipedia FR
Chthonerpeton indistinctum est une espèce de gymnophiones de la famille des Typhlonectidae[1].
Répartition
Cette espèce se rencontrent entre 20 et 1 000 m d'altitude dans le sud-est de l'Amérique du Sud[1] :
Publication originale
- Reinhardt & Lütken, 1862 "1861" : Bidrag til Kundskab om Brasiliens Padder og Krybdyr. Förste Afdeling Paddern og Oglerne. Videnskabelige meddelelser fra den Naturhistoriske forening i Kjöbenhavn, vol. 1861, no 10/15, p. 143-242 (texte intégral).
Notes et références
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Chthonerpeton indistinctum: Brief Summary
(
Francês
)
fornecido por wikipedia FR
Chthonerpeton indistinctum est une espèce de gymnophiones de la famille des Typhlonectidae.
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Chthonerpeton indistinctum
(
Neerlandês; Flamengo
)
fornecido por wikipedia NL
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Chthonerpeton indistinctum: Brief Summary
(
Neerlandês; Flamengo
)
fornecido por wikipedia NL
Chthonerpeton indistinctum is een wormsalamander (Gymnophiona) uit de familie waterbewonende wormsalamanders (Typhlonectidae). De wetenschappelijke naam van de soort werd in 1862 als Siphonops indistinctus gepubliceerd door Johannes Theodor Reinhardt en Christian Frederik Lütken.
Deze soort komt voor in de Paranárivier van het zuiden van Paraguay tot aan de monding ervan in het noordoosten van Argentinië, en langs de kust van het zuiden van Uruguay verder naar het noorden tot het zuidoosten van Brazilië in de staat Santa Catarina.
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Chthonerpeton indistinctum
(
Português
)
fornecido por wikipedia PT
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Chthonerpeton indistinctum: Brief Summary
(
Português
)
fornecido por wikipedia PT
Chthonerpeton indistinctum é uma espécie de anfíbio da família Typhlonectidae. Está presente na Argentina, Brasil, Paraguai e Uruguai. É uma espécie aquática. Pode estar ameaçado por poluição da água proveniente da indústria e da agricultura. De uma maneira geral a espécie é comum, podendo sofrer algumas flutuações populacionais significativas, mas sem por em perigo a sobrevivência da espécie.
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Chthonerpeton indistinctum
(
Vietnamita
)
fornecido por wikipedia VI
Chthonerpeton indistinctum là một loài lưỡng cư thuộc họ Caeciliidae. Loài này có ở Argentina, Brasil, Paraguay, và Uruguay. Môi trường sống tự nhiên của chúng là rừng ôn đới, sông ngòi, đầm nước, đầm nước ngọt, đầm nước ngọt có nước theo mùa, vùng đồng cỏ, đất có tưới tiêu, đất nông nghiệp có lụt theo mùa, và kênh đào và mương rãnh. Chúng hiện đang bị đe dọa vì mất môi trường sống.
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Chthonerpeton indistinctum: Brief Summary
(
Vietnamita
)
fornecido por wikipedia VI
Chthonerpeton indistinctum là một loài lưỡng cư thuộc họ Caeciliidae. Loài này có ở Argentina, Brasil, Paraguay, và Uruguay. Môi trường sống tự nhiên của chúng là rừng ôn đới, sông ngòi, đầm nước, đầm nước ngọt, đầm nước ngọt có nước theo mùa, vùng đồng cỏ, đất có tưới tiêu, đất nông nghiệp có lụt theo mùa, và kênh đào và mương rãnh. Chúng hiện đang bị đe dọa vì mất môi trường sống.
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