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Dipsas Variegata (Duméril, Bibron & Duméril, 1854) (Serpentes, Dipsadidae) from the State of Rio De Janeiro, Brazil

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Dipsas Variegata (Duméril, Bibron & Duméril, 1854) (Serpentes, Dipsadidae) from the State of Rio De Janeiro, Brazil 16 6 NOTES ON GEOGRAPHIC DISTRIBUTION Check List 16 (6): 1531–1535 https://doi.org/10.15560/16.6.1531 First record of Dipsas variegata (Duméril, Bibron & Duméril, 1854) (Serpentes, Dipsadidae) from the state of Rio de Janeiro, Brazil Luiz Eduardo Mendonça Regio1, 2, Jorge Antônio Lourenço Pontes1 1 Grupo de Estudos Interdisciplinares do Ambiente, Programa de Pós-Graduação em Ensino, Ambiente e Sociedade, Faculdade de Formação de Professores, Universidade do Estado do Rio de Janeiro. Rua Francisco Portela, 1470, 24435-005, Patronato, São Gonçalo, RJ, Brazil. 2 Parque Estadual da Pedra Branca, Diretoria de Áreas Protegidas, Instituto Estadual do Ambiente do Rio de Janeiro. Avenida Venezuela, 110, 20081-312, Saúde, Rio de Janeiro, RJ, Brazil. Corresponding author: Luiz Eduardo Mendonça Regio, [email protected] Abstract We present the first record of Dipsas variegata (Duméril, Bibron & Duméril, 1854) from the state of Rio de Janeiro. We collected this species on 25 July 2018 in Pedra Branca State Park, municipality of Rio de Janeiro. The new record is approximately 214 km from the nearest previously location in the municipality of Ilhabela, state of São Paulo. The specimen was deposited in the Museu Nacional da Universidade Federal do Rio de Janeiro (MNRJ). This record is part of a study on snakes in the park and expands the distribution of D. variegata to the Rio de Janeiro state. Keywords Atlantic Forest, geographic distribution, range extension, Squamata Academic editor: Josué Anderson Rêgo Azevedo | Received: 22 July 2020 | Accepted: 20 October 2020 | Published 11 November 2020 Citation: Regio LEM, Pontes JAL (2020) First record of Dipsas variegata (Duméril, Bibron & Duméril, 1854) (Serpentes, Dipsadidae) from the state of Rio de Janeiro, Brazil. Check List 16 (6): 1531–1535. https://doi.org/10.15560/15.6.1531 Introduction The Atlantic Forest in the state of Rio de Janeiro, Brazil, (Marques et al. 2019), and at least 92 species of these is fragmented due to deforestation and urban advance of have been registered in the state of Rio de Janeiro (Costa large coastal cities. Species have been lost as a result, and Bérnils 2018) and 28 species only in the municipal- possibly even before they were known to science (e.g., ity of Rio de Janeiro (Pontes and Rocha 2008; Pontes et. Bergallo et al. 2000; Rocha et al. 2003; Mittermeier al. 2009, 2015). et al. 2005; Fundação SOS Mata Atlântica and INPE The Neotropical snail-eating snake, Dipsas variegata 2018). Despite its history of occupation, the city of Rio (Duméril, Bibron & Duméril, 1854), is terrestrial, noc- de Janeiro still has well-preserved forest fragments turnal, malacophagous, and oviparous, as are other spe- housing a considerable richness of reptiles (Pontes and cies in the family Dipsadidae (Argôlo 2004; Marques et Rocha 2008; Pontes et al. 2009, 2015). One of the larg- al. 2019). This species has a wide geographical distribu- est protected fragments in Rio is Pedra Branca State tion in South America, through the Amazon Forest and Park, occupying about 10% of the area of the munici- the Atlantic Forest. Despite its occurrences in the other pality (12,491.72 ha) (Castro 2015). Currently, 142 spe- states of southeastern Brazil, D. variegata had not previ- cies of snakes are known to occur in the Atlantic Forest ously been registered in Rio de Janeiro (Costa and Bérnils © The authors. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 1532 Check List 16 (6) 2018; Nogueira et al. 2019). The present study addresses 1960; Peters and Orejas-Miranda 1970; Porto and Fer- the first record of the snail-eating snakeDipsas variegata nandes 1996). Taxonomic identification was performed (Duméril, Bibron & Duméril, 1854) in Rio de Janeiro. by Paulo Passos from the Museu Nacional, where the specimen was deposited under the number MNRJ 26914. Methods This study received scientific research authorization by? INEA no. 058/2018. Occasional sampling for snakes were performed dur- ing the study on snakes in the neighborhood of Var- gem Grande, near an outpost of the Pedra Branca State Results Park in the municipality of Rio de Janeiro, southeastern New record. BRAZIL • 1 ♂, snouth–vent length = Brazil, in an area occupied by a traditional community 258 mm, mass = 4.85 g; Cafundá Astrogilda Quilom- of descendants of African slaves (Cafundá Astrogilda bola community, in Parque Estadual da Pedra Branca, Quilombola ; Fig. 1). Vargem Grande, Rio de Janeiro, RJ; 22°57′12″S, 043° Biometric measurements of the live specimen were 29′24″W, WGS84 datum; 195 m a.s.l.; 25 July 2018; Luiz made using a measuring tape graduated in mm and a 10 Eduardo Mendonça Regio leg.; undergrowth vegetation, g Pesola® scale. The specimen was then euthanized with a formation of anthropogenic vegetation and a mono- the use of lidocaine (7%), fixed in 10% formalin, and culture of banana trees (Musa × paradisiaca L.); MNRJ packed in a bottle with 70% alcohol (sensu Foster 2012). 26914 (Fig. 1). The identification of the specimen was confirmed This record expanded the geographic distribution by comparing of the scale count, color patterns of the area of the species to the coast of Rio de Janeiro state specimens with the available species diagnoses (Peters (Fig. 2). Figure 1. Female specimen of Dipsas variegata (Duméril, Bibron & Duméril, 1854). A. In life. B. Specimen deposited in the herpetological collection of the Museu Nacional (MNRJ 26914). C. Habitat in Pedra Branca State Park, Rio de Janeiro. Photos by Luiz Regio and Jorge Pontes. Regio and Pontes | Dipsas variegata from Rio de Janeiro 1533 Figure 2. Maps showing the distribution of Dipsas variegata (Duméril, Bibron & Duméril, 1854): black dots = previous records (Nogueira et al. 2019); red dot = new record from Pedra Branca State Park, Rio de Janeiro, Rio de Janeiro. 1534 Check List 16 (6) Identification. Dipsas variegata can be distinguished discovery of D. variegata, or commentary clarifying the from its congeners by the first of the dorsal spots, right expansion of its geographical distribution. on the neck, which is not very clear and defined like the This record and others (Pontes and Rocha 2008; Cas- other species and by the hemipenial structure, specially tro et al. 2020) demonstrates the importance of protect- by the distribution and shape of the spines. The dorsal ing and studying forest fragments in urban areas and the patches invade only laterally the belly; belly irregularly need to implement local conservationist policies. stained cream dark; absent pre-ocular; two post-ocular; smooth back without apical pit; ventrals 173–185; whole Acknowledgements anal; subcaudal scales 71–85, divided. Maximum length of around 800 mm, with a head distinct from the body; We thank the Faculty of Teacher Training FFP/UERJ large eyes with vertical pupils; back of the head brown; and the Graduate Program in Teaching Science, Envi- body laterally compressed; body color light brown ronment and Society/PPGEAS. We also thank the entire with dark brown rhomboid spots, on the dorsal region body of park guards at Pedra Branca State Park, Pau da with lighter colored border; some of these spots have a Fome, Piraquara, Quilombola, and Camorim headquar- slightly lighter center (Peters 1960; Peters and Orejas- ters; the Cafundá Astrogilda Quilombola community, Miranda 1970; Porto and Fernandes 1996; Argôlo 2004; which contributed to the work in the region; the State Farias 2016). Environment Institute (INEA) for issuing authorization; all those responsible for the herpetological collection of the Museu Nacional, Rio de Janeiro, especially Dr Paulo Discussion Passos; and Felipe Noronha for his help with the map. The geographic distribution of the species Dipsas var- We also thank the reviewrs and editor Josué Anderson iegata in South America covers Bolivia, Brazil, Peru, Rêgo Azevedo. Suriname and Trinidad. In Brazil it is found in 16 sta- tes (Roraima, Amapá, Amazonas, Pará, Rondônia, Authors’ Contributions Mato Grosso, Maranhão, Paraíba, Pernambuco, Ala- goas, Bahia, Espírito Santo, Minas Gerais, São Paulo, LEMR collected the specimen; both authors studied the Paraná, and Santa Catarina) (Peters and Orejas-Miranda specimen, visited scientific collections, and wrote the 1970; Porto and Fernandes 1996; Costa and Bérnils 2018; manuscript. Nogueira et al. 2019). This record increased the number of species in the municipality to 29 species and in the References state to 93 species (Pontes et al. 2015; Costa and Bérnils Argôlo AJS (2004) As serpentes dos cacauais do sudeste da Bahia. 2018). The previous record closest to the state of Rio de Editus, Ilhéus, 33 pp. Janeiro for D. variegata was in the Island of São Sebas- Bergallo HG, Rocha CFD, Alves MAS, Van Sluys M (2000) A fauna ameaçada de extinção do Estado do Rio de Janeiro. EdUERJ, Rio tião, municipality of Ilhabela, located on the north coast de Janeiro, 168 pp. of the state of São Paulo (23°45′ to 23°55′S and 045°17′ Castro TM, Chaves FG, Bérnils RS, Silva-Soares T (2020) First re- to 045°24′W) (Centeno et al. 2008). Therefore, the gap of cord of Dipsas mikanii Schlegel, 1837 (Serpentes, Dipsadidae) occurrence records for the state of Rio de Janeiro, was from Espírito Santo state, Brazil. Check List 16 (3): 681–684. not likely (Fig. 2). Dipsas variegata inhabits ombrophi- https://doi.org/10.15560/16.3.681 Castro PF (2015) Atlas das unidades de conservação do estado do Rio lous forests at low altitudes (Porto and Fernandes 1996; de Janeiro. Metalivros, São Paulo, 172 pp. Nogueira et al. 2019) where it can be found on both the Centeno FC, Sawaya RJ, Marques OAV (2008) Snake assemblage of vegetation and on the ground, with nocturnal habits, and Ilha de São Sebastião, southeastern Brazil: comparison to main- feeding on mollusks (Marques et al.
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