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Imantodes Inornatus (Boulenger, 1886) (Squamata: Dipsadidae): Expansion of Known Range and First Records from the Magdalena River Valley, Colombia

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Imantodes Inornatus (Boulenger, 1886) (Squamata: Dipsadidae): Expansion of Known Range and First Records from the Magdalena River Valley, Colombia Díaz-Ayala et al. Imantodes inornatus (Boulenger, 1886) (Squamata: Dipsadidae): expansion of known range and first records from the Magdalena River valley, Colombia Nota Imantodes inornatus (Boulenger, 1886) (Squamata: Dipsadidae): expansion of known range and first records from the Magdalena River valley, Colombia Imantodes inornatus (Boulenger, 1886) (Squamata: Dipsadidae): expansión del rango de la distribución conocida y primeros registros del valle del río Magdalena, Colombia Román F. Díaz-Ayala, Julián A. Rojas-Morales, Juan C. Zuluaga-Isaza y Viviana A. Ramírez-Castaño Abstract The first report of the Speckled Blunt-headed Tree Snake (Imantodes inornatus) is presented for the Magdalena River valley, from the departments of Antioquia, Bolívar, Boyacá and Caldas in Colombia. Since these records correspond to the biogeographic Magdalena province, the known range for the species is expanded. In Colombia, this is a trans-Andean species found from the Pacific rainforests of the Chocó region, through the northern portion of the Western and Central Andean ranges, to the middle Magdalena River valley. Keywords. Biogeographic provinces. Geography. Species distribution. Speckled Blunt-headed Tree Snake. Resumen Se registra por primera vez la serpiente de árbol cabeza moteada (Imantodes inornatus) en el valle del río Magdalena en los departamentos de Antioquia, Bolívar, Boyacá y Caldas, en Colombia. Estos registros corresponden a la provincia biogeográfica del Magdalena, lo que aumenta el área de distribución conocida. En Colombia, esta especie es un elemento transandino que cruza las selvas tropicales del Pacífico de la región chocoana, a través de la porción septentrional de las cordilleras Occidental y Central hasta el valle medio del río Magdalena. Palabras clave. Distribución de especies. Geografía. Provincias biogeográficas. Serpiente arborícola de cabeza roma moteada. Introduction Accurate information on species distribution the status of threatened species (IUCN, 2012). and natural history is the basis for biodiversity With over 270 snake species, Colombia is one of management and conservation (González-Maya the richest countries in snake fauna in the world, et al., 2014), for it is a key attribute for assessing surpassed only by Mexico and Brazil (http:// BIOTA COLOMBIANA 19 (1) - 2018 219 DOI: 10.21068/c2018.v19n01a14 Díaz-Ayala et al. www.reptile-database.org, Lynch et al., 2014). ranges from Nicaragua in Central America, However, knowledge about biological aspects to Ecuador in northern South America, being such as diversity patterns, distribution, natural an arboreal dwelling species in lowland wet history, and conservation status of Colombian forests, with some records in pre-montane wet snakes is still incipient and poorly represented forest (Myers, 1982; Savage, 2002; Köller, 2003). in scientific literature. Although herpetological In Colombia, this species is known in the west collections from the late nineteenth and early (Pacific slope) of the Cordillera Occidental twentieth centuries have provided a large between 0-880 m of elevation, Chocó-Magdalena collection of snakes from almost all Colombian province (sensu Hernandez-Camacho et al., eco-regions (Lynch et al., 2014), reviews have been 1992), in the departments of Chocó and Valle del made only on a few species (<10 %), generating Cauca (Sánchez-C. et al., 1995; Castaño-Mora et major challenges in terms of snake conservation al., 2004; Castro-Herrera & Vargas-Salinas, 2008; (Lynch, 2012, 2015). Cardona-Botero et al., 2013; Echavarría-R. et al., 2016). The Neotropical Speckled Blunt-headed Tree Snake of the genus Imantodes (Linnaeus, 1758), are nocturnal and arboreal species. Eight nominal Based on individuals recently recorded in the species of Imantodes are currently known. They field, review of scientific literature and data of are widely distributed from Central to South herpetological collections, we present the first America (Myers, 1982; Torres-Carvajal et al., records of I. inornatus in the Magdalena River 2012; Medina-Rangel et al., 2018). These snakes valley, which corresponds to the trans-Andean have arboreal habits with morphological features valley that separates Eastern and Central ranges adapted to this microhabitat, including thin (Cordillera Oriental and Cordillera Central) in bodies and enlarged heads with protuberant central Colombia. eyes, which differs significantly from the neck (Savage, 2002; Torres-Carvajal et al., 2012). There are seven species of Imantodes in Colombia, which Materials and methods are: I. cenchoa (Linnaeus, 1758); I. chocoensis Torres- Records of I. inornatus were taken from Carvajal et al. 2012; I. gemmistratus (Cope, 1861); fieldwork completed in 2014, in the area of I. guane Missassi & Prudente 2015; I. inornatus Miel I hydroelectric project. Also, we reviewed (Boulenger, 1896); I. lentiferus (Cope, 1894); I. information and specimens from different phantasma Myers 1982 (Medina-Rangel et al., 2018). herpetological collections and museums: AMNH The genus Imantodes is distributed throughout the (American Museum of Natural History, New country, from sea level to 2300 m of elevation, but York), MHN-UC (Museo de Historia Natural certain eco-regions are poorly represented with Universidad de Caldas, Manizales, Caldas), MHUA few published data, such as the Orinoco savannas and the Amazonian rainforest (see Rojas-Morales (Museo de Herpetología Universidad de Antioquia, et al., 2014 for I. cenchoa), biogeographic provinces Medellín, Antioquia), ICN (Instituto de Ciencias of Orinoquia, Guayana and Amazonia (sensu Naturales de la Universidad Nacional, Bogotá, Hernandez-Camacho et al., 1992). Cundinamarca), UIS (Colección de Herpetología Universidad Industrial de Santander, Bucaramanga, Imantodes inornatus differs from its congeners Santander), CD (Colección docencia Universidad by having yellowish dorsum and small black del Valle, Cali, Valle del Cauca) y COL200CH-M spots on the head, which often form very narrow (Colección Científica de Referencia Zoológica de la crosslines, usually 1 preocular or rarely 2, fewer Universidad Tecnológica del Chocó - Herpetología, than 220 ventrals and fewer than 140 subcaudal Quibdó, Chocó) (Table 1). scales (Myers, 1982; Savage, 2002). This species 220 BIOTA COLOMBIANA 19 (1) - 2018 Díaz-Ayala et al. Imantodes inornatus (Boulenger, 1886) (Squamata: Dipsadidae): expansion of known range and first records from the Magdalena River valley, Colombia Table 1. List of the recorded localities of Imantodes inornatus in Colombia, based on literature, fieldwork and museum data. New records in bold. Sources: 1. Castaño-Mora et al. (2004), 2. Sistema de Información de Biodiversidad (SIB), 3. American Museum of Natural History (AMNH, New York), 4. Museo de Herpetología Universidad de Antioquia (MHUA-R), 5. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá, Colombia (ICN), 6. Universidad Industrial de Santander (UIS-R), 7. Colección docencia, Universidad del Valle (CD), 8. Echavarría-R. et al. (2016) and 9. Cardona-Botero et al. (2013). Elevation Museum Department Municipality Locality Latitude Longitude Province Source (m a.s.l) voucher Campamento Antioquia Anorí Porce II, Quebrada 6°59'6.00"N 75°5'22.92"W 875 Magdalena MHUA-R 14540 2,4, Review San Benigno Antioquia Guadalupe 6°49'0.59"N 75°14'38.30"W 1840 Magdalena MHUA-R 14720 2,4, Review Central Hidroeléctrica San Antioquia San Carlos 6°11'33.72"N 74°48'10.80"W 866 Magdalena 2, Review Carlos, Embalse Punchiná Bolívar Norosí 8°24'54.36"N 74°13'15.96"W 881 Magdalena MHUA-R 14873 2,4, Review Puerto Romero Boyacá Puerto Boyacá 5°50'34.81"N 74°19'35.76"W 504 Magdalena ICN 7919 5, Review (Las Quinchas) Caldas Victoria La Cantera 5°33'36.38"N 74°52'4.41"W 501 Magdalena MHN-UC-0262 Field work Caldas Samaná La Campiña 5°30'2.20"N 74°54'30.94"W 583 Magdalena Field work Caldas Norcasia Puente Hierro 5°34'15.90"N 74°52'36.87"W 401 Magdalena Field work Chocó Condoto Río Condoto 5°7'1.20"N 76°40'54.48"W 99 Chocó-Darién AMNH_R4492 3 Chocó Quibdó 5°41'33.71"N 76°40'18.48"W 39 Chocó-Darién ICN-120 1,5 COLZOOCH-H: Chocó Tadó Salero 5°21'37.10"N 76°38'45.24"W 98 Chocó-Darién 8 1499 Vereda Los Santander Betulia 7°3'29.88"N 73°22'45.12"W 290 Magdalena UIS-R-3273 6, Review Mirabeles Valle del Dagua 3°36'57.96"N 76°51'28.80"W 555 Chocó-Darién CD-4158 7 Cauca Río Calima, Valle del Campamento Buenaventura 3°47'0.24"N 76°52'44.04"W 300 Chocó-Darién ICN 398 1,5,9 Cauca Cartón de Colombia 221 BIOTA COLOMBIANA 19 (1) - 2018 DOI: 10.21068/c2018.v19n01a14 Díaz-Ayala et al. Results and discussion We obtained nine records of I. inornatus: three 2C) was found on 31 October 2014 at 21:47 h in from the field and six from specimens in “La Cantera”, El Bosque village, municipality of herpetological collections (Figure 1, Table 1). Victoria, department of Caldas. This individual Fieldwork specimens: On 12 March 2014 at 19:17 was observed on the base of a submerged h, an individual of I. inornatus (590 mm snout vent plant in a pond border; it was collected under length [SVL], 213 mm tail length [TL], Figure 2A) permit resolution number 164 of 2014, issued was found moving across a bush of ferns 90 cm by CORPOCALDAS (Autonomous Regional height from the ground, at “bosque La Campiña”, Corporation of Caldas), and it was deposited in Confines village, municipality of Samaná, the Museo de Historia Natural of the Universidad department of Caldas. A second specimen was de Caldas (MHN-UC 0262). This specimen observed on 19 July 2014 at 09:03 h, moving in presents 17-17-15 dorsal scales, 196 ventrals, 105 riparian vegetation in “Puente Hierro” vereda subcaudals, eight supralabials (3-5 contacting La Quiebra, Norcasia municipality, department the orbit), nine infralabials (1-5 contacting of Caldas (Figure 2B). A third specimen (632 shinshields), one preocular, and one postocular mm SVL, 231 mm TL, MHN-UC 0262, Figure scales.
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