Melanophryniscus atroluteus
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| Melanophryniscus atroluteus | |
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Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Anura |
| Family: | Bufonidae |
| Genus: | Melanophryniscus |
| Species: | M. atroluteus |
| Binomial name | |
| Melanophryniscus atroluteus (Miranda-Ribeiro, 1920) | |
| Synonyms[2] | |
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Melanophryniscus atroluteus is a species of toad in the family Bufonidae. It is found in northeastern Argentina, Uruguay, southern Paraguay, and southern Brazil (Rio Grande do Sul, presumably also Santa Catarina).[1][2] While in the past it was considered a subspecies of Melanophryniscus stelzneri, it might rather be conspecific with Melanophryniscus montevidensis.[2] Common name Uruguay redbelly toad (also spelled Uruguay red belly toad) has been coined for it.[1][2]
Males can reach 25 mm (1.0 in) and females 29 mm (1.1 in) in snout–vent length,[3] although reported lengths are commonly slightly smaller.[3][4] Skin is strongly granular.[3] The dorsum is uniformly black, without blotches, while the belly is black and has red and/or yellow blotches. The throat is dark. Webbing is poorly developed.[4]