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Description ( الإنجليزية )

المقدمة من AmphibiaWeb articles
A medium-sized toad with a blunt rounded snout. Males reach 52–86mm SVL, females 55–87 mm. The head is much wider than long. The nostril is situated closer to the snout tip than to the eye. The eye diameter surpasses the snout length. The well-defined tympanum is about 0.6 times the size of the eye diameter. These toads have moderately developed, more or less kidney-shaped parotid glands whose anterior border, above the tympana, is very vaguely defined, bearing just a few thorns. An infratympanic ridge runs from the corner of the mouth to the armpit. Males have single subgular vocal sacs. The dorsum has numerous conical warts, each of which bears a black spine. These toads may contain some rather rounded warts, bearing various spines, and they are arranged along the vertebral line on the last third of the back. Spines are usually less developed on females. Males have prominent elongate glands on the hidden surfaces of their forearms, and during the breeding season, black nuptial pads are present on the first three fingers. The palmar tubercles are covered with many asperities which are conical but not thorny. The inner metacarpal tubercle is smaller than the outer one, one half being covered by a black nuptial pad. Hind limbs have sharp-edged tarsal folds and modest webs, without warts. Both an inner and an outer metatarsal tubercles are present, the former being larger, ovoid and prominent. The contain very few additional subdigital tubercles. The ventral skin is roughly granular, without asperities. According to Tandy et al. (1976), the sex-dependent size dimorphism is lacking in some populations. Animals from Cameroon apparently reach somewhat larger sizes (Hulselmans 1977b). Salvador (1996) gives 97 mm SVL for females.Coloration: The cream to pale gray or chocolate-brown back bears six pairs of symmetrical patches, the fourth pair being the largest. These spots are all bordered in black. Additional asymmetrical dark patches may be present. Very rarely, those patches fused into each other. White spots or vertebral lines are rarely present. The basic coloration of the extremities is similar to that of the back, usually bearing dark patches of irregular shape. The black spiny tips of the warts contrast sharply with the paler background. An indistinct brown canthal strip is present. Starting at the posterior end of the parotid glands, an indistinct clear strip runs half-way across the flanks. The venter is cream colored, being somewhat mottled on some males. The throats of females show a light pigmentation, those of males a dark one. They also contain scarlet meandering markings on the outer parts of the thighs. In alcohol, the red pigments may disappear. The coloration of females is more contrasting, and they never show the above-mentioned scarlet markings. The webbing is flesh-colored.Voice: Lasting about 0.36–0.40 sec, the call has a dominant frequency of 0.88 kHz. It comprises a complex sequence of pulses which are said to resemble the "hoot" uttered by a big owl. The advertisement call varies according to the toad’s size (Tandy et al. 1976). According to Hulselmans (1977b), a sequence comprises 12–21 single calls, each lasting 0.25–0.35 sec, and being made up of 47–73 pulses. Hulselmans (1977b) mentions three dominant frequencies (0.57–0.60, 0.73–0.80 and 0.89–0.97 kHz). He also reports on highly variable individual calls.This account was taken from Rödel, M.-O. (2000), Herpetofauna of West Africa vol. I. Amphibians of the West African Savanna, with kind permission from Edition Chimaira (http://www.chimaira.de/) publishers, Frankfurt am Main.For references in the text, see here
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Distribution and Habitat ( الإنجليزية )

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Range: So far, this species has not been documented at Comoé National Park. According to Frost (1985), its range comprises Africa south of the Sahara, with Tanzania forming the southern limit. In particular, it has been recorded form the following countries: Senegal, Guinea, Sierra Leone, Mali, Algeria, Niger, Cameroon, Chad, Ethiopia, Eritrea, Somalia, Kenya, Uganda, Tanzania (Laurent 1965, Amiet 1973a, Böhme 1975, Tandy et al. 1976, Hulselmans 1977b, Joger 1981, 1982, Lanza 1981, ?Zug 1987, Salvador 1996, Joger & Lambert 1997, Largen 1997a, 1998, Poynton 1998). Habitats: Very arid savannas with 299–1000 mm precipitation (x = 578 mm) and mean year temperatures of 16–29.2 °C (x = 23.4 °C) (Tandy et al. 1976, Hulselmans 1977b, Lanza 1981). The range of this species even includes the massifs of the central Sahara. In desert areas it colonizes oases (Salvador 1996). It is rather doubtful whether the Guinea savanna is equally colonized by this toad. According to Joger (1981), potential habitats include dry river beds, oasis gardens and watering places.
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Life History, Abundance, Activity, and Special Behaviors ( الإنجليزية )

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Spawn: Unknown. If the B. gutturalis mentioned in Zug (1987; this author based his determination on Tandy & Keith 1972, compare synonyms) happens to be B. xeros, their eggs show a diameter of 0.9–1 mm when still in the ovaries. The animal pole is darker.Tadpoles: Detailed descriptions are lacking. According to Salvador (1996), tadpoles reach 34 mm TL. Metamorphosed froglets measure 10.5–15 mm.Biology: According to Salvador (1996) in northwest Africa, B. xeros is active from September to March. There it is active during night-time. In the breeding season, which lasts from September to October, it is diurnal, too. The diet of this toad includes arachnids and insects, mainly coleopterans. Tandy et al. (1976) describe a half-submerged male calling from a pond within the river bed. Hulselmans (1977b) reports on calling males sitting near or in the water.
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Subdesert toad ( الإنجليزية )

المقدمة من wikipedia EN

The subdesert toad (Amietophrynus xeros) is a species of toad in the family Bufonidae. It is found in Algeria, Cameroon, Chad, Djibouti, Eritrea, Ethiopia, Gambia, Guinea, Kenya, Libya, Mali, Mauritania, Niger, Senegal, Somalia, Sudan, Tanzania, Uganda, Western Sahara, possibly Angola, possibly Benin, possibly Burkina Faso, possibly Central African Republic, possibly Democratic Republic of the Congo, possibly Guinea-Bissau, and possibly Nigeria. Its natural habitats are dry savanna, subtropical or tropical dry shrubland, subtropical or tropical dry lowland grassland, intermittent rivers, intermittent freshwater marshes, freshwater springs, hot deserts, and arable land. Its conservation status is assessed by the International Union for Conservation of Nature as being of "least concern".[1]

Description

The subdesert toad is a medium-sized species with a broad head and blunt snout. The dorsal surface bears conical warts tipped with black spines. This toad varies in colour from cream or pale grey to dark brown and has three pairs of symmetrical dark-edged markings and various other dark blotches. The underparts are cream with variable amounts of mottling. Females have pale throats while those of males are darker, and males also have vocal sacs on the throat and some irregular red markings on the outer thighs.[2]

Behaviour

The subdesert toad lives in arid regions and may aestivate for long periods. In northwestern Africa it is active between September and March with breeding taking place in September and October, clutches of eggs being laid in temporary ponds and pools in river beds. it is mainly nocturnal and feeds on small invertebrates such as spiders, beetles and other insects.[1][2]

References

  1. ^ a b c IUCN SSC Amphibian Specialist Group (2013). "Amietophrynus xeros". IUCN Red List of Threatened Species. 2013. Retrieved 2014-09-24.old-form url
  2. ^ a b Roedel, M. O. (2001-02-26). "Amietophrynus xeros". AmphibiaWeb. Retrieved 2014-09-24.
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Subdesert toad: Brief Summary ( الإنجليزية )

المقدمة من wikipedia EN

The subdesert toad (Amietophrynus xeros) is a species of toad in the family Bufonidae. It is found in Algeria, Cameroon, Chad, Djibouti, Eritrea, Ethiopia, Gambia, Guinea, Kenya, Libya, Mali, Mauritania, Niger, Senegal, Somalia, Sudan, Tanzania, Uganda, Western Sahara, possibly Angola, possibly Benin, possibly Burkina Faso, possibly Central African Republic, possibly Democratic Republic of the Congo, possibly Guinea-Bissau, and possibly Nigeria. Its natural habitats are dry savanna, subtropical or tropical dry shrubland, subtropical or tropical dry lowland grassland, intermittent rivers, intermittent freshwater marshes, freshwater springs, hot deserts, and arable land. Its conservation status is assessed by the International Union for Conservation of Nature as being of "least concern".

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Sclerophrys xeros ( الإسبانية، القشتالية )

المقدمة من wikipedia ES

Sclerophrys xeros es una especie de anfibios anuros de la familia Bufonidae.

Distribución geográfica y hábitat

Habita en el sur de Argelia, Camerún, Chad, Eritrea, Etiopía, Gambia, Guinea, Kenia, sudoeste de Libia, Malí, Mauritania, Níger, Senegal, Somalia, Sudán, Tanzania, Uganda, Yibuti, Sáhara Occidental y, posiblemente en Angola, Benín, Burkina Faso, República Centroafricana, República Democrática del Congo, Sudán del Sur, Guinea Bissau y Nigeria.

Su hábitat natural incluye sabanas secas, zonas secas de arbustos tropicales o subtropicales, praderas, ríos y marismas intermitentes de agua dulce, nacientes, desiertos y tierra arable.

Está amenazada por la pérdida de su hábitat natural en ciertas zonas de su distribución.

Referencias

  • Frost, D.R. «Sclerophrys xeros ». Amphibian Species of the World: an Online Reference. Version 6.1. (en inglés). Nueva York, EEUU: Museo Americano de Historia Natural. Consultado el 18 de febrero de 2016.
  • IUCN SSC Amphibian Specialist Group. 2013. Amietophrynus xeros. The IUCN Red List of Threatened Species. Version 2015.4. Acceso: 18 de febrero de 2016.
  • Tandy, M., J. Tandy, R. Keith, and A. Duff-MacKay . 1976. A new species of Bufo (Anura: Bufonidae) from Africa’s dry savannas. Pearce-Sellards Series. Texas Memorial Museum. Austin 24: 1-20.

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Sclerophrys xeros: Brief Summary ( الإسبانية، القشتالية )

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Sclerophrys xeros es una especie de anfibios anuros de la familia Bufonidae.

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Amietophrynus xeros ( الباسكية )

المقدمة من wikipedia EU

Amietophrynus xeros Amietophrynus generoko animalia da. Anfibioen barruko Bufonidae familian sailkatuta dago, Anura ordenan.

Erreferentziak

Ikus, gainera

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Amietophrynus xeros: Brief Summary ( الباسكية )

المقدمة من wikipedia EU

Amietophrynus xeros Amietophrynus generoko animalia da. Anfibioen barruko Bufonidae familian sailkatuta dago, Anura ordenan.

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Sclerophrys xeros ( الفرنسية )

المقدمة من wikipedia FR

Sclerophrys xeros est une espèce d'amphibiens de la famille des Bufonidae[1].

Répartition

Cette espèce se rencontre de 200 à 1 800 m d'altitude[1] :

Sa présence est incertaine en Angola, au Bénin, au Burkina Faso, en République centrafricaine, en République démocratique du Congo, en Guinée-Bissau, au Nigeria et au Soudan du Sud.

Description

Les mâles mesurent de 52 à 86 mm et les femelles de 55 à 87 mm[2].

Taxinomie

Sclerophrys chudeaui (Chabanaud, 1919) pourrait être synonyme de cette espèce[3].

Publication originale

  • Tandy, Tandy, Keith & Duff-MacKay, 1976 : A new species of Bufo (Anura: Bufonidae) from Africa’s dry savannas. Pearce-Sellards Series, Texas Memorial Museum, vol. 24, p. 1–20.

Notes et références

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Sclerophrys xeros: Brief Summary ( الفرنسية )

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Sclerophrys xeros est une espèce d'amphibiens de la famille des Bufonidae.

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Sclerophrys xeros ( البرتغالية )

المقدمة من wikipedia PT

Sclerophrys xeros é uma espécie de anfíbio da família Bufonidae, que pode ser encontrada na Argélia, nos Camarões, no Chade, no Djibuti, na Eritreia, na Etiópia, em Gâmbia, na Guiné, no Quênia, na Líbia, no Mali, na Mauritânia, no Niger, em Senegal, na Somália, no Sudão, na Tanzânia, em Uganda e no Saara Ocidental. Habita locais de até 1 800 metros de altitude, podendo ser visto em desertos, zonas úmidas, campos, pântanos e savanas. Costuma ficar próxima a corpos d'água, como poças, oásis e leitos de rios secos.[1]

Descrição

Os machos medem entre 52 e 86 milímetros, enquanto as fêmeas medem 55 e 87 milímetros. A coloração de seu dorso varia entre o creme e o cinza ou castanho, apresentando seis pares de manchas simétricas, sendo a quarta a maior, e, mais raramente, pode acontecer desses pares se fundirem em uma só mancha. Seu ventre possuir cor de creme, que é mosqueado nos machos, e o pescoço das fêmeas apresentam uma pigmentação mais clara, sendo nos machos totalmente escura. Alguns indivíduos possuem partes das coxas vermelho-escarlate, característica que só pode ocorrer em machos.[2]

Possuem glândulas parotoides parcialmente desenvolvidas e com formato de rim, estando presentes acima do tímpano, que é bem visível. Os machos possuem um único saco vocal, que está presente na região subgular. Seu dorso possui inúmeros tubérculos, que podem ser assemelhar a um espinho ou ter um formato arredondado, costumando estar alinhadas com a coluna vertebral. Sua pele ventral é levemente granulada, mas sem apresentar asperidade. Os machos possuem glândulas alongadas proeminentes sob a pele, e durante o período reprodutivo, desenvolvem almofadas nupciais nos três primeiros dedos.[2]

Sua vocalização dura entre 0,36 e 0,4 segundos, com a frequência dominante em 880 hertz, e composta por uma série complexa de pulsos, que podem ser descritos de forma onomatopeica como "hoot", semelhante ao som emitido por uma coruja. Seu coaxar pode variar de indivíduo para indivíduo, principalmente quando de tamanhos diferentes.[2]

Referências

  1. «Subsaharan Toad» (em inglês). IUCN Red List. Consultado em 9 de março de 2019
  2. a b c «Sclerophrys xeros» (em inglês). AmphibiaWeb. Consultado em 11 de março de 2019
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Sclerophrys xeros: Brief Summary ( البرتغالية )

المقدمة من wikipedia PT

Sclerophrys xeros é uma espécie de anfíbio da família Bufonidae, que pode ser encontrada na Argélia, nos Camarões, no Chade, no Djibuti, na Eritreia, na Etiópia, em Gâmbia, na Guiné, no Quênia, na Líbia, no Mali, na Mauritânia, no Niger, em Senegal, na Somália, no Sudão, na Tanzânia, em Uganda e no Saara Ocidental. Habita locais de até 1 800 metros de altitude, podendo ser visto em desertos, zonas úmidas, campos, pântanos e savanas. Costuma ficar próxima a corpos d'água, como poças, oásis e leitos de rios secos.

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