ABSTRACT. During a faunal rescue conducted at a hydroelectric power station constructed in a Cerrado savanna area in the state of Mato Grosso, a sample of five small stripe-patterned individuals of snakes of the genus Apostolepis Cope, 1862 document the existence of an undescribed species, which is named herein. The new species can be distinguished from its congeners by a combination of scale counts, number of maxillary teeth and color pattern. The new species is most similar to Apostolepis borellii Peracca, 1904, A. lineata Cope, 1887, A. nelsonjorgei Lema & Renner, 2004, A. nigroterminata Boulenger, 1896, A. serrana Lema & Renner, 2006 and A. underwoodi Lema & Campbell, 2017 in its coloration pattern. However, it is distinguished from these species by having a pair of triangular blotches covering portions of the third to sixth supralabials, a white nuchal collar, the shape of the fourth supralabial and the shape of the tip of tail, the number of supralabials in contact with parietals, the size of the anterior chinshields, the color pattern of the paraventral side, parietal and terminal scales, the width of dorsal stripes, and a distinct number of subcaudals. The new species occurs in areas within the Cerrado biome.

The geographical ranges of many bird species are neither uniform nor continuous. Species that are common in some regions may be rare in others, or their status of occurrence may be uncertain. Here, we present the first documented record of Azure Gallinule (Porphyrio flavirostris) as well as details and discussion on the distribution and status of previous records of the Least Bittern (Ixobrychus exilis), Paint-billed Crake (Neocrex erythrops), and Plain-breasted Ground-dove (Columbina minuta) in the Brazilian state of Acre. While all these species have relatively wide ranges, little is known of their distribution in the southwestern Amazon basin.

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We present a new distribution record of Liophis dorsocorallinus in the state of Acre, Brazil. The species was previously known only from three localities in Venezuela and Brazil.

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