''Sphaenorhynchus mirim'' is a

frog A frog is any member of a diverse and largely Carnivore, carnivorous group of short-bodied, tailless amphibians composing the order (biology), order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-f ...

. Scientists have seen it in one place: Fazenda Gemada in

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. The adult male frog measures 15.7–18.2 mm in snout-vent length. The frog's head is wider than it is long. The skin of the dorsum is bright green in color with white spots. Parts of the toes are yellow in color. The ventrum and vocal sac are whitish green. Some reports indicate that this frog may undergo early

sexual maturation Sexual maturity is the capability of an organism to reproduce. In humans it might be considered synonymous with adulthood, but here puberty is the name for the process of biological sexual maturation, while adulthood is based on cultural definitio ...

. Scientists note that the tadpoles develop

reproductive organ A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction. The reproductive organs together constitute the reproductive system. In animals, the testis in the male, and the ovary in the female, a ...

s before undergoing metamorphosis. Scientists think this is so they can reproduce soon after becoming frogs. The authors of the original description note that the rest of the tadpoles' bodies develop at the normal rate, making it unlikely that the development observed in their study was due to exposure to pharmaceutical pollutants. This frog is sympatric to '' Dendropsophus elegans'', '' Dendropsophus minutus'', and ''

Scinax alter ''Scinax alter'', the Crubixa snouted treefrog, is a species of frog in the family Hylidae endemic to Brazil. Appearance The adult male frog measures 22.5 to 31.1 mm long in snout-vent length and the adult female frog 23.9–31.0 mm. Scientis ...

''.

References

Sphaenorhynchus Frogs of South America {{Hylidae-stub