The nomenclatural status of Rana gaimardii Bory de Saint-Vincent, 1828, and Hyla quoyi Bory de Saint-Vincent, 1828 (Anura, Hylidae) are discussed. Rana gaimardii and its combination Hyla gaimardi, a nomen oblitum under Article 23.9.1 of the International Code of Zoological Nomenclature, may be removed from the synonymy of Hypsiboas boans (Linnaeus, 1758) and included in the synonymy of Hypsiboas faber (Wied-Neuwied, 1821) to improve the geographic distribution of both species. Hyla quoyi Bory de Saint-Vincent, 1828, considered by Frost (2010) as incertae sedis in the Hylinae and as a nomen oblitum under the Article 23.9.1 of the International Code of Zoological Nomenclature, if available would replace the well established name Hypsiboas prasinus (Burmeister, 1856); therefore, to improve the nomenclatural status of both species, Hyla quoyi must be included in the synonymy of H. prasinus as a nomen oblitum. Hypsiboas prasinus is a nomen protectum relative to Hyla quoyi, a nomen oblitum.
O girino de Lysapsus laevis (Parker, 1935) é descrito e figurado, com base em exemplares coletados na Vila Surumu, Estado de Roraima, Brasil. No estágio 37, o girino possui 61,4 mm de comprimento total; corpo triangular em vista lateral, ovóide em vistas dorsal e ventral, correspondendo a 28% do comprimento total; olhos laterais, parcialmente visíveis em vistas dorsal e ventral; disco oral ânteroventral, pequeno; fórmula dentária, 2(2)/3(1); espiráculo curto, sinistro; tubo anal longo, largo, direito, mediano; em vida, dorso do corpo verde, ventre branco iridescente; musculatura caudal e nadadeiras verdes; terço anterior da nadadeira caudal e tubo anal com manchas irregulares iridescentes; metade distal da cauda cinza a cinza escuro; íris bronze. Notas sobre o ambiente, hábitos e desenvolvimento são apresentadas.
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