Comprehensive DescriptionRead full entry
The SVL varies from 18-23 mm in males and from 21-25 mm in females. Snout truncate or rounded. Head as long as wide. The tympanum is distinct and nearly circular. Nostrils dorsolateral. The dorsal surface is smooth. Hands with a distinct palmar tubercle; subarticular tubercles rounded. Prepollex distinct. Legs slender. Toes not robust. The color in life also varies, but almost all the specimens have a dark green or dark brown color pattern. A dark brown stripe bordered by a white stripe is visible on the flanks and canthus rostralis. Belly white. Toe and finger discs are reddish. Many specimens bear two divergent dorsal brown stripes, from the anterior section of the head to nearly the middle of the body (Napoli and Caramaschi 1999).
The tadpole has a total length of 30 mm at Gosner stage 35. The body is depressed dorsoventrally in lateral view and violin-shaped in dorsal view; body length approximately 35% of total length; snout slightly triangular in dorsal and ventral views; nostrils large, elliptical. Spiracle sinistral, short, not projecting, located at the beginning of the posterior third of the body, with inner wall present. Vent tube short, dextral, attached to ventral fin. Tail has terminal flagellum; dorsal fin begins at the posterior edge of the body. Oral disc anteroventral reduced to U-shaped yoke around mouth and modified into a projecting tube. Papillae, denticles, and dermal ridges between the beak and lower lip are absent. In life, the tadpole body is reddish brown with a conspicuous median brown mark dorsally and a brown stripe from the tip of the snout through the eye to the posterior margin of the body. Tail pale brown anteriorly, reddish brown with yellowish spots posteriorly (Pugliese et al. 2001).
Dendropsophus rubicundulus belongs to the D. microcephalus species group (Faivovich et al., 2005); it was formerly placed in the D. rubicundulus species group (Napoli and Caramaschi 1999).
Rabello (1970) and Gruber et al. (2005) reported a 30-chromosome karyotype in D. rubicundulus, with the majority being telocentric and subtelocentric chromosomes.