Introduction Amphibians and reptiles represent an important component of an area’s biodiversity because they have essential ecological functions in natural assemblages (e.g., Colli et al., 2002; Costa et al., 2007; Brites et al., 2009). Due to their abundance and the relative ease with which they can generally be located, identified, and studied, amphibians and reptiles are commonly used to identify areas and priorities for conservation (Diniz- Filho et al., 2004; Vitt et al., 2007). In addition, the number of undescribed species remains high in many places and examples of such discoveries are plentiful (e.g., Brandão, 2002; Colli et al., 2003a,b; Giugliano et al., 2013). The neotropical region harbours enormous biodiversity, and a significant centre of endemism in eastern Brazil is Atlantic Forest (e.g., Rocha et al., 2003; Mittermeier et al., 2005; Ribeiro et al., 2009). Originally, Atlantic Forest covered an area of approximately 1,500,000 km 2 along the east coast of Brazil and ranging into the interior of the country (Ab’Saber, 1977), but since the arrival of European colonists deforestation has devastated the area Herpetology Notes, volume 11: 455-474 (2018) (published online on 28 May 2018) Herpetofauna in two habitat types (tabuleiros and Stational Semidecidual Forest) in the Reserva Biológica Guaribas, northeastern Brazil Daniel O. Mesquita 1, *, Brygida C.F. Alves 2 , Carmem K.B. Pedro 1 , Daniel O. Laranjeiras 1 , Francis L.S. Caldas 3 , Isabella M.M.C. Pedrosa 1 , Jefter B. Rodrigues 1 , Leandro O. Drummond 4 , Lucas B.Q. Cavalcanti 1 , Milena Wachlevski 5 , Paulo Nogueira-Costa 6 , Rafaela C. França 7 and Frederico G.R. França 2 1 Centro de Ciências Exatas e da Natureza, Departamento de Sistemática e Ecologia Universidade Federal da Paraíba, João Pessoa, PB 58051-900, Brazil 2 Centro de Ciências Aplicadas e Educação, Campus IV, Litoral Norte, Universidade Federal da Paraíba, Rio Tinto, PB 58297-000, Brazil 3 Faculdades Integradas de Sergipe, Largo Glicério Cerqueira 387, Centro, Tobias Barreto, SE 35690-000, Brazil 4 Departamento de Ecologia, Laboratório de Vertebrados, CP 68020, Universidade Federal do Rio de Janeiro, Ilha do Fundão, Rio de Janeiro, RJ 21941-901, Brazil 5 Centro de Ciências Biológicas e da Saúde, Universidade Federal Rural do Semi-Árido, Mossoró, RN 59625-900, Brazil 6 Departamento de Ecologia, IBRAG, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, Rio de Janeiro, RJ 20550-019, Brazil 7 Programa de Pós-graduação em Ecologia e Conservação da Biodiversidade, Universidade Estadual de Santa Cruz, CEP 45662-900 – Salobrinho, BA, Brazil * Corresponding author. E-mail: danmesq@dse.ufpb.br Abstract. We present a detailed list of the reptiles and amphibians occurring in two habitat types (tabuleiros and Stational Semidecidual Forest) in the Reserva Biológica Guaribas (REBIO Guaribas), Paraíba State, northeastern Brazil. We sampled species using pitfall traps, transects, and during active searches. We recorded a total of 106 species, including 20 lizards, seven amphisbaenians, 42 snakes, one turtle, two crocodilians, and 34 frogs. Of these, five lizards, six snakes, 14 frogs, seven amphisbaenians, and the turtle were new records for REBIO Guaribas. The frog and snake rarefaction curves reached the asymptote, indicating that we achieved a good estimate of species richness for those taxa. The herpetofauna in REBIO Guaribas is composed of species typical for both forested biomes and open areas. The open areas in REBIO Guaribas occur within an Atlantic Forest matrix and are locally known as tabuleiros, which present typical elements of cerrado savannahs, reinforcing the importance of the open areas in species composition and maintenance of regional fauna. We outline the importance of long-term inventories, such as in REBIO Guaribas, especially due to the higher number of rare species found, which provides essential information for species and habitat management. Keywords: Herpetofauna, Reserva Biológica Guaribas, tabuleiros, savannahs, endemism, new records, Brazil