Lithodytes lineatus (Schneider, 1799) is a monotypic species of the genus Lithodytes, commonly known as Gold-striped frog (^{Frank and Ramus 1996}). This is a widely distributed species throughout the Amazon domain, and can also be found in transitional areas between the Amazon and Cerrado domains (^{La Marca et al. c2010}, ^{Valdujo et al. 2012}, ^{Cintra et al. 2014}). In Brazil, L. lineatus occurs in the states of Acre, Amazonas, Pará, Rondônia, Mato Grosso, Tocantins, Maranhão, and Amapá (^{Pavan 2007}, ^{La Marca et al. c2010}, ^{Cintra et al. 2014}, ^{Freitas et al. 2014}).

Here we provide new distribution records for L. lineatus in the Tocantins state, northern Brazil (Fig. 1). We obtained the new records during herpetofaunal studies in the Ara-guaia-Tocantins hydrographic basin, a transitional area between Amazonia and Cerrado. We captured individuals of L. lineatus (Fig. 2) using pitfall traps (collecting permit issued by IBAMA: 63228-1), and deposited the specimens in the Coleção Zoológica da Universidade Federal de Mato Grosso do Sul, Campo Grande municipality, Mato Grosso do Sul state, Brazil. To create the distribution map, we use the ecoregions shapefile from World Wild Life - WWF (^{Olson et al. 2001}) modified to display the Brazilian domains highlighting the Ecoregion "Mato Grosso tropical dry forests" usually named as "Cerrado-Amazon ecotone" (e.g. ^{Bezerra et al. 2009}, ^{Cintra et al. 2014}). We used the International Union for Conservation of Nature - IUCN spatial data with the proposed L. lineatus distribution (La Marca et al. c20l0). Then, we added literature records from Tocantins (^{Pavan 2007}, ^{Cintra et al. 2014} and present study), Maranhão (^{Freitas et al. 2014}) and Pará state (^{Bernardo et al. 2012}). There is no information about Lithodytes lineatus type locality; thus, we expanded its distribution based on the nearest known locality for the species.

Figure 1 Distribution map of Lithodytes lineatus in South America. Colors on map represent Domains and Ecoregions from South America (modified from ^{Olson et al. 2001}). Striped area indicates the distribution suggested for the species by International Union for Conservation of Nature - IUCN (^{La Marca et al. c2010}). White circles indicate literature records which were not included in the distribution indicated by IUCN, and black circles indicate the new records in Tocantins state, Brazil (1: Araguafna and 2: Caseara). 

Figure 2 Individual of Lithodytes lineatus (ZUFMS-AMP: 08394) from Caseara municipality, Tocantins state, Brazil. 

In March 2016, we collected two individuals of L. lineatus in Araguaína municipality (vouchers ZUFMS-AMP 08393 and 08394), northern Tocantins (7°6'17.03'' South; 48°11'23.32" West). This record extends the geographic distribution of L. lineatus approximately 79 km northwest from the nearest locality, Filadélfia municipality, Tocantins state, Brazil (^{Cintra et al. 2014}) (Fig. 1).

In January 2017 and May 2018, we found six individuals of L. lineatus in Caseara municipality (vouchers ZUFMS-AMP 11243-11246), western Tocantins (9°24'25.36" South; 49°58'21.33" West). The records of L. lineatus to the Caseara municipality extend its distribution in approximately 280 km south-west from the previously southernmost locality in the state, reported from Palmeirantes municipality (^{Pavan 2007}) (Fig. 1).

The data presented here on the geographic range of L. lineatus south into the Cerrado show that this species does not occur exclusively in the Amazon domain, reaching transitional areas and forest habitats in the Brazilian Cerrado. This result reinforces the species structure demonstrated by ^{Valdujo et al. (2012)} that Amazonian species of marginal occurrence in the Cerrado are concentrated in the western and northern of this domain. Despite harboring a unique anuran species composition comprised of species typical to the Cerrado and neighboring domains (Amazonia and Caatinga; ^{Silvano et al. 2016}), the Brazilian state of Tocantins still has many gaps of knowledge related to biodiversity and distribution patterns of anurans (^{Diniz-Filho et al. 2005}). Additional sampling effort and new records will help to fill these gaps and improve strategies for conservation of biodiversity in this anuran species-rich region of northern Brazil.