Philodryas patagoniensis, also known as the Patagonia green racer, is a species of rear-fanged (opisthoglyphous) venomous snake in the family Colubridae. The species is endemic to cis-Andean South America from northern Argentina to northeastern Brazil; despite its name, most of its range is outside Patagonia.[1][2]
P. patagoniensis is a medium-sized, cylindrical and robust snake, with a moderately long tail. It can grow to a maximum total length (including tail) of 150 cm (59 in). The snout is rounded. The eye is medium-sized with a round pupil. The dorsal scales are smooth with unique apical scores.[3]
P. patagoniensis is terrestrial, fundamentally arboreal when foraging, and has daytime habits. It has a brownish color that helps in its camouflage.[4]
P. patagoniensis has sexual dimorphism in adult specimens. Females have a longer body, with greater corpulence, while males have a longer tail. Females are born with a greater rostro-cloacal length and reach sexual maturity later than males, about 2-years-old. Males can reach sexual maturity at 1-year-old. Reproduction is seasonal, with the vitellogenic season occurring between the months of July and October.[4]
P. patagoniensis preys upon snakes including its own species. Juveniles feed on ectothermic animals, while adults feed on endothermic animals.[4]
P. patagoniensis is preyed upon by birds such as Cariama cristata and Tyto alba, as well as other snakes such as Boiruna maculata.[4]
P. patagoniensis is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay.[1][2]
P. patagoniensis occurs in a range of open habitats including Patagonian steppe, Cerrado, Chaco, and Caatinga, and also open areas of the Atlantic forest.[1]
Common names for P. patagoniensis include corre campo, parelheira, parelheira comum, papa pinto, culebra del alfa, culebra de los pastos, ratonera, and mboi hovy.[3]
P. patagoniensis produces toxic saliva through the Duvernoy's gland. Its toxin is constituted by 90% protein, mainly metalloproteinases. The biological activity of the toxins is very similar to that of Bothrops, with edematogenic, hemorrhagic, nociceptive, and necrosis activity of this compound. This species has an LD50 of 58.58 µg / mouse, a value close to Bothrops jararacussu with 58.8 µg / mouse, its toxicity is between Bothrops alternatus with 67.5 µg / mouse and Bothrops jararaca with 24.7 µg / mouse. However, P. patagoniensis has opisthoglyphous dentition and has difficulty injecting venom.[4] Its venom also contains neurotoxic and myotoxic components, which result in neuromuscular block and myonecrosis.[5]
Philodryas patagoniensis, also known as the Patagonia green racer, is a species of rear-fanged (opisthoglyphous) venomous snake in the family Colubridae. The species is endemic to cis-Andean South America from northern Argentina to northeastern Brazil; despite its name, most of its range is outside Patagonia.
La culebra del pastizal, patagónica, parejera o ratonera (Philodryas patagoniensis) es una especie serpiente de la familia Colubridae. Se distribuye por Brasil, Bolivia, Paraguay, Argentina, Uruguay.[2]
La coloración general es en tonos de verde, generalmente oscuros y poco brillantes. De todos modos el patrón de coloración es muy variable,[2] al igual que el diseño. Principalmente en crías se observan series de manchas definidas, oscuras a lo largo del cuerpo, tanto sobre los flancos como en la región dorsal. El vientre es claro, blanquecino. Mide aproximadamente 1,5 m.[cita requerida]
Es una especie venenosa, con una dentición opistoglifa. Son poco frecuente los casos de mordeduras de esta serpiente, aunque las consecuencias de estos pueden llegar a ser graves. Los síntomas son parecidos a los del envenenamiento por las víboras del género Bothrops, lo que lleva a que se suministre al paciente con suero antibothrópico sin que esto sea necesario. Los síntomas más graves son hemorragia, mionecrosis, dermonecrosis y edema.[3][4]
Se refugian bajo piedras y troncos. Se han hallado muchos ejemplares tomando sol sobre rocas. Al intentar atraparla se muestra agresiva, aunque siempre trata de huir y refugiarse bajo rocas o arbustos antes que una confrontación. Es de hábitos crepusculares y nocturnos.[cita requerida] Se alimenta de ranas, sapos, lagartijas, culebras incluyendo las de su misma especie, pichones, ratones y arañas.[cita requerida]
Los machos alcanzan la madurez hacia el final del primer año, con una longitud de 0,50 m, mientras que las hembras llegan a la madurez con un tamaño de hasta 0,75 m. Las hembras ponen entre 10 y 15 huevos entre los meses de noviembre y diciembre. Los juveniles nacen en enero (con un tamaño de unos 20 cm aproximadamente). A temperaturas de 30 °C la incubación dura 57 días.[5]
Datos: Q5085436
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Especies: Philodryas patagoniensis
La culebra del pastizal, patagónica, parejera o ratonera (Philodryas patagoniensis) es una especie serpiente de la familia Colubridae. Se distribuye por Brasil, Bolivia, Paraguay, Argentina, Uruguay.
Philodryas patagoniensis Philodryas generoko animalia da. Narrastien barruko Dipsadidae familian sailkatuta dago.
Philodryas patagoniensis Philodryas generoko animalia da. Narrastien barruko Dipsadidae familian sailkatuta dago.
Philodryas patagoniensis est une espèce de serpents de la famille des Dipsadidae[1].
Cette espèce se rencontre[1] :
C'est un serpent venimeux[1] de couleur verte et tacheté de noir[2].
Son nom d'espèce, composé de patagoni[e] et du suffixe latin -ensis, « qui vit dans, qui habite », lui a été donné en référence au lieu de sa découverte, la Patagonie argentine.
Philodryas patagoniensis est une espèce de serpents de la famille des Dipsadidae.
Philodryas patagoniensis, popularmente chamada de cobra-parelheira ou papa-pinto, é uma serpente da família dos colubrídeos.[3] É uma serpente de dentição opistóglifa, com peçonha sem interesse médico. Possui coloração marrom-acinzentado, com um ventre mais claro; atinge quase um metro e meio de comprimento.[2]
A espécie é endêmica da América do Sul, pode ser encontrada na Argentina, Bolívia, Brasil, Paraguai e Uruguai. Encontrada principalmente em locais de floresta seca a úmida.[4]
Philodryas patagoniensis, popularmente chamada de cobra-parelheira ou papa-pinto, é uma serpente da família dos colubrídeos. É uma serpente de dentição opistóglifa, com peçonha sem interesse médico. Possui coloração marrom-acinzentado, com um ventre mais claro; atinge quase um metro e meio de comprimento.
Philodryas patagoniensis là một loài rắn trong họ Rắn nước. Loài này được Girard mô tả khoa học đầu tiên năm 1858.[1]
Bài viết liên quan phân họ rắn Xenodontinae này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Philodryas patagoniensis là một loài rắn trong họ Rắn nước. Loài này được Girard mô tả khoa học đầu tiên năm 1858.
