Ansonia leptopus
Ansonia leptopus, also known as the brown slender toad or cricket-voiced toad, is a species of toad found in the lowland primary rainforests of Borneo, Sumatra, and potentially Peninsular Malaysia. It is distinguished by its slender build, warts on its dorsum, and spines under the mandible in males, and its tadpoles feature distinctive black markings.
Key Facts
- ›Found in primary rainforests of Borneo, Sumatra, and Peninsular Malaysia.
- ›Males reach snout-to-vent lengths of 30-40 MM; females up to 55 MM.
- ›Adults inhabit the forest floor and herb layer, with males calling from rocks on river banks at night.
- ›Breeding is explosive and occurs in small, clear, rocky-bottomed streams.
- ›Tadpoles are small with unusual black markings and a less developed oral sucker compared to other Ansonia tadpoles.
- ›Threatened by habitat loss due to deforestation and stream siltation.
Brown Slender Toad, Matang Stream Toad, Cricket-Voiced Toad
Rainforest, Freshwater Streams, Forest Floor, Herb Stratum
Borneo, Sumatra, Peninsular Malaysia
- Slender Build
- Low Warts On the Dorsum
- Brown Or Yellow Spines Under the Mandible
- Dark Brown Nuptial Pads
- Tadpoles With Unusual Black Markings On A Light Background
- Less Developed Oral Sucker In Tadpoles
About Ansonia leptopus
Ansonia leptopus, commonly referred to as the brown slender toad or cricket-voiced toad, is a species of toad native to the lowland primary rainforests of Southeast Asia. Its known distribution includes Borneo (encompassing Brunei), Sumatra in Indonesia, and potentially Peninsular Malaysia, where it is reported as common in Malaysian Borneo.
Description and Characteristics
This toad is characterized by its slender physique. Adult males typically measure between 30 to 40 mm (1.2–1.6 in) in snout-to-vent length, while females can reach up to 55 mm (2.2 in). Dorsally, they possess low warts. A notable feature in males is the presence of brown or yellow spines beneath the mandible, accompanied by dark brown nuptial pads. The tadpoles of Ansonia leptopus are distinctively small, less than 20 mm (0.79 in), and marked with unusual black patterns on a light background. Their oral sucker is also less developed compared to other tadpoles in the Ansonia genus.
Habitat and Ecology
The primary habitat for Ansonia leptopus is undisturbed primary rainforest. Adults are widely distributed across the forest floor and within the herb stratum. During nighttime, calling males are often found on boulders and rocks adjacent to river banks. Breeding is a rapid, or explosive, event that occurs in small, clear streams characterized by rocky bottoms. The tadpoles are most commonly observed in shallow side pools and within submerged beds of dead leaves found in these streams.
Conservation Concerns
Ansonia leptopus faces significant threats, primarily habitat loss resulting from deforestation. This destruction of its rainforest environment also leads to the silting of the streams, which are crucial breeding grounds for the species.
Taxonomy
- Scientific Name: Ansonia leptopus
- Family: Bufonidae
- Genus: Ansonia
- Common Names: Brown slender toad, Matang stream toad, Cricket-voiced toad
Source: Wikipedia ↗
Frequently Asked Questions
What are the common names for Ansonia leptopus?
Ansonia leptopus is known by several common names, including the brown slender toad, Matang stream toad, and cricket-voiced toad.
What is the size of Ansonia leptopus?
Adult males typically measure between 30 to 40 millimeters (1.2 to 1.6 inches) in snout-to-vent length, while females can grow up to 55 millimeters (2.2 inches).
Where does Ansonia leptopus live?
This species inhabits primary rainforests in lowland areas of Borneo (including Brunei), Sumatra (Indonesia), and Peninsular Malaysia, though its presence in the latter is uncertain.
What is the habitat of Ansonia leptopus tadpoles?
The tadpoles are most commonly found in shallow side pools of streams and within submerged beds of dead leaves.
What are the threats to Ansonia leptopus?
Ansonia leptopus is threatened by habitat loss, primarily due to deforestation. This deforestation also leads to the siltation of the streams where they breed.
Related Frogs
Ansonia spinulifer
Ansonia spinulifer, also known as the spiny slender toad or Kina Balu stream toad, is a species of true toad native to the rainforests of northern Borneo. This toad is distinguished by its large, spinose warts, which give it its name, and its specialized breeding habits that occur near clear, rocky-bottomed streams.
Ansonia albomaculata
Ansonia albomaculata, also known as the white-lipped slender toad or whitebelly stream toad, is a toad species endemic to the island of Borneo. This slender toad is characterized by its dark brown, warty dorsum and is found in lowland rainforests, breeding in clear, rocky-bottomed streams where its tadpoles cling to rocks.
Ansonia hanitschi
Ansonia hanitschi, commonly known as the Kadamaian stream toad, is a species of toad endemic to the mountains of Borneo. This amphibian is found in both Malaysian and Indonesian Borneo, inhabiting submontane and montane forests, typically on the forest floor. Its breeding is closely tied to clear, rocky mountain streams.