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Abstract
In the vicinity of Leticia, Sphaenorhynchus carneus, S. dorisae, and S. lacteus occur microsympatrically in permanent forest ponds of tierra firme as well as varzea, forming part of a complex community comprising about ten species. Their larvae are nektonic and are found associated with floating vegetation. The larvae are characterized by having multiple rows of large labial papillae (except S. dorisae) and a median anal tube, as well as distinctive coloration (green with red markings) in life. Sphaenorhynchus dorisae has a buccal structure similar to what has been called a "labial arm" in Scarthyla goinorum or the Scinax of the rostrata species group. Sphaenorhynchus carneus has a single row of denticles anterior to the beak whereas the other two species have two rows. New data about the biology of these three species are presented.
References
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