Otophryne pyburni Campbell & Clarke 1998

Otophryne pyburni is a small frog; adult females can grow to 61 mm in SVL, while the males can reach 55 mm (Campbell and Clarke, 1998). This frog has a broad body, short legs, and a broad, triangular head with a sharp-pointed snout projecting well past the lower jaw. Nostrils are elongated and protruding. The tympanum is large and distinct. A supratympanic groove is present, extending from the posterior of the eye nearly to the forelimb. The pupils are round, with the upper third of the iris pale bronze and the lower part dark brown. The tongue is broad and oval-shaped, and is attached at the anterior but free at the posterior. No vomerine teeth are present. Choanae are large and oval-shaped. The body is robust, with an inguinal fold of skin between the thigh and the side of the body. Fingers have rounded and slightly expanded tips, without webbing; the relative finger lengths are 3>4>2>1. Palmar tubercles are present on the hand as well as subarticular tubercles. Toe tips are rounded but not dilated, and the relative length of the toes is 4>3>5>2>1. Some toes have lateral keeling but no fringe is present. Reduced webbing is present between the toes. A glandular ridge is present on the lower surface of the shank, developing into a series of tubercles across the metatarsus and heel. Subarticular tubercles are low and rounded on the foot (Campbell and Clarke, 1998). The dorsum can be reddish brown to grayish yellow or gray-brown and may be uniform in color, or patterned with darker streaks and a dark mid-dorsal stripe (Wassersug and Pyburn, 1987; Campbell and Clarke, 1998). A pale irregular stripe runs from the snout across the canthus to the eye and the top of the tynpanum, continuing along the side of the body. Below the stripe, the side of the body is dark brown. The sides of the head and the lower parts of the limbs are also dark brown, while the upper parts of the limbs are lighter and the same color as the dorsum. The throat is generally dark brown with pale speckles, with the chest also speckled but somewhat lighter brown, and the abdomen a pale cream to orange color. Some females may have a pale throat, and females also usually have a broader lateral pale stripe. The lower surface of the hindlimbs and feet are orange. Generally there are raised, cream-colored bumps present on the dorsum and the limbs (Campbell and Clarke, 1998). This frog blends well into leaf litter, having been described as resembling a "pinnately veined dead leaf" (Wassersug and Pyburn, 1987). It is capable of metachrosis, with reddish individuals able to become brown to grayish brown, and yellow individuals changing to yellow-gray (Wassersug and Pyburn, 1987).This species was first described by Campbell and Clarke (1998), and is named for William F. Pyburn.

This species can be found from southeastern Colombia through the lowlands of southern Venezuela and Guyana to French Guiana. It inhabits rainforest areas with sandy soils (Zweifel, 2003), at elevations ranging from 200-1100 m above sea level (IUCN, 2006).

This species is not threatened as it occurs in regions not currently subject to significant human impact. However, it does not appear to be very tolerant of habitat modification (IUCN, 2006).

Pyburn's Pancake Frogs are thought to spend most of their time underground. Their diet is likely to consist of ants. These frogs are diurnal, and males call during the day from their shelters under leaf litter or under roots near the streamside. Females lay large (4.6 mm) unpigmented eggs, which are thought to be deposited in a nest cavity close to a stream (Zweifel, 2003). The tadpoles have two characteristics unique among microhylids. First, both the upper and lower jaws have a row of sharp, keratinized teeth. The toothed jaws might be used for predation (Pyburn, 1980)or possibly for filtering out sand, since the larvae live shallowly buried in the sand and filter-feed in shallow, clear streams (Wassersug and Pyburn, 1987). Second, the spiracle has an unusual location; it opens near the base of the tail, on the left posterior side of the ventrum, rather than midventrally. The spiracle extends as a tube as the tadpole grows, eventually reaching halfway down the tail (Zweifel, 2003).

The Wayapi Indians of French Guiana have been reported to eat Otophryne adults (Lescure et al., 1980).

Otophryne pyburni és una espècie de granota que viu al Brasil, Colòmbia, Guaiana Francesa, Guaiana, Surinam i Veneçuela.

Es troba amenaçada d'extinció per la pèrdua del seu hàbitat natural.

Otophryne pyburni is a species of frog in the family Microhylidae. It is found in northern South America east of the Andes (northern Brazil, southeastern Colombia, French Guiana, Guyana, Suriname, and southern Venezuela). It is a common, diurnal frog found in tropical rainforest, perching next to streams or living on the forest floor under leaves or among roots. Males are territorial and calling mostly on rainy days. The eggs may be laid either inside or outside water. The tadpoles are aquatic and hide under leaves in small ponds. It is locally threatened by habitat loss.

Otophryne pyburni es una especie de anfibios de la familia Microhylidae. Se encuentra en Brasil, Colombia, Guayana Francesa, Guayana, Surinam y Venezuela entre los 200 y los 1100 msnm. Habita selvas tropicales, donde es activa durante el día cerca de arroyos. Los machos son territoriales. Los renacuajos se desarrollan en pequeñas charcas.

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Otophryne pyburni Otophryne generoko animalia da. Anfibioen barruko Microhylidae familian sailkatuta dago, Anura ordenan.

Otophryne pyburni est une espèce d'amphibiens de la famille des Microhylidae.

Otophryne pyburni é uma espécie de anfíbio da família Microhylidae.

Pode ser encontrada nos seguintes países: Brasil, Colômbia, Guiana Francesa, Guiana, Suriname e Venezuela.

Os seus habitats naturais são: florestas subtropicais ou tropicais húmidas de baixa altitude, regiões subtropicais ou tropicais húmidas de alta altitude, marismas de água doce e marismas intermitentes de água doce.

Está ameaçada por perda de habitat.

Otophryne pyburni là một loài ếch trong họ Nhái bầu. Nó được tìm thấy ở Brasil, Colombia, Guyane thuộc Pháp, Guyana, Suriname, và Venezuela. Các môi trường sống tự nhiên của chúng là các khu rừng ẩm ướt đất thấp nhiệt đới hoặc cận nhiệt đới, các khu rừng vùng núi ẩm nhiệt đới hoặc cận nhiệt đới, đầm nước ngọt, và đầm nước ngọt có nước theo mùa. Loài này đang bị đe dọa do mất môi trường sống.