Adult: Species description based on Savage (2002). A small glass frog (males to 24 mm, females to 26 mm). Dorsal: The dorsum is spotted yellow, with green reticulations filling the space between the spots. Some small dark spots may be present in the green areas. Ventral: The ventral surface is transparent. The heart is covered by white tissue and not visible, and the liver and digestive tract are also white. Eye: The eye is gold.
Egg: Clutches contain no more than 40 eggs (McDiarmid and Adler 1974). Tadpole: The tadpole is small and fairly flattened, with a long, muscular tail (Savage 2002). The dorsal surface is brownish and the ventral surface appears reddish (the blood inside the body is visible, Savage 2002). The tail fins are clear, but the tail muscle has some darker pigmentation (Savage 2002).
Habitat: Lowland and premontane forest to 400 m. Call: A high-pitched "seet" (Starrett and Savage 1973) Behavior and communication: Males are territorial and will fight intruding males if necessary (McDiarmid and Adler 1974, McDiarmid 1975). Males attend clutches and may simultaneously guard multiple clutches from multiple females at once (McDiarmid and Adler 1974). Males continue to guard clutches during the day, sleeping next to them, often with one hand resting on the egg mass (Hayes 1991, McDiarmid and Adler 1974, McDiarmid 1978). Type locality: La Palma, Costa Rica, 4500 feet
Diagnostic description: The back strip lacks a vertebral straight on both sides bordeda yellow stripes. The reverse side has live specimens in a lattice of green and yellow with black spots (the preserved specimens have a well demarcated reticulum by black dots). Usually without enlarged parotid glands, but if present. Head lacking ridges. No dorsal fold in the head or fleshy fold on the roof of the mouth. The belly is transparent in living specimens, which will allow the internal organs. The bones are white in live specimens. The pericardium is white in live specimens.
A conspicuous lack tarsal tubercle, and the leg lacks tarsal fold. They have legs with five toes, not two internal elongated tubers, such as shovels, with a free margin. Without a pair of fleshy protrusions on the dorsal terminal finger region. They have a small digital groove, which separates the upper surface of the finger and bearing, at least in the two outer fingers and toes of the foot. Ventral disk lacks. The fingers are usually membranes; intercalary cartilage present between the last phalanges of the fingers. The talus and calcaneus are fused, the terminals are straight or T or Y. foma lack vomerine teeth. The membrane between the fingers of the hand ll-lll is not as extensive as between fingers III-IV, but restricted to the base of the toes.
Habitat: Live in the vegetation along streams within the rainforest.
Reproduction: The males emit songs to attract females to mate.
Apparently the meeting edges is important in close communication in male-male, male resident when an intruder is detected as a potential competitor.
Food: They feed on small insects like flies and crickets.
Behavior: They are nocturnal and arboreal.
Distribution in Costa Rica: In wetlands, low and medium, and the Atlantic slope of the center and south of the Pacific slope, between 6 and 1,500 m. Lift (Savage 2002).
Distribution outside Costa Rica: They are from the central part of Costa Rica to the Pacific slope of Ecuador.