Printer Friendly

PRIMER REGISTRO DEL LEUCISMO EN TROPIDURUS HISPIDUS (SPIX, 1825) (SQUAMATA: TROPIDURIDAE) EN EL NORTE DE BRASIL, AMAZONIA ORIENTAL.

FIRST RECORD OF LEUCISM IN TROPIDURUSHISPIDUS (SPIX, 1825) (SQUAMATA: TROPIDURIDAE) IN NORTH BRAZIL, EASTERN AMAZON

Leucism is an unusual coloration pattern caused by developmental anomalies in the differentiation of the pigment cells, usually due to genetic mutations or environmental factors that cause an excess or deficit in the metabolism of dermal pigmentation, restricted to specific body region or throughout the entire body (Duellman & Trueb, 1994). In vertebrates leucism does not occur frequently in nature but has been recorded in amphibians (Keely & Maldonado, 2013; Moraes & Kaefer, 2015) and reptiles (Noronha et al., 2013; Kornilios, 2014). Among the hereditary chromatic anomalies, there are several classifications based on pigmentation loss, being leucism and albinism the main recognized types (Miller, 2005; Abreu et al., 2013). Although the terminology used is divergent and many authors consider leucism as partial albinism (Rodriguez-Pinilla & Gomez-Martinez, 2011; McCardle, 2012). Leucism occurs when the body of the animal is partially or totally depigmented, but the remaining margins of the body and the eyes remain pigmented, while albinism occurs in animals with complete absence of pigmentation, including the eyes, which become reddish or pink (Fertl & Rosel, 2002; Miller, 2005). Here we present the first record of leucism in Tropidurus hispidus.

Lizards of the genus Tropidurus (Wied, 1820) are abundant diurnal species found in open formations and forested habitats, distributed from southern Venezuela, through the Guianas to northeastern Brazil, from there west south of the Amazon region to eastern Bolivia, extreme northern Uruguay, and central Argentina (Frost, 1992; Frost et al., 2001). Tropidurus hispidus is a heliothermic species belonging to the T. torquatus species group, widely distributed throughout northeastern South America, including the Caatinga of northeastern Brazil, with a southern limit in Bias Fortes, Minas Gerais, Brazil (Rodrigues, 1987; Frost et al, 2001).

At 1055 h on 21 September 2015, a leucistic male of Tropidurus hispidus was photographed on a rocky surface and leaf litter around the Fortaleza de Sao Jose de Macapa (0.031058[degrees]N, 51.049133[degrees]W, datum WGS84), municipality of Macapa, Amapa state, Brazil. The lizard exhibited some level of depigmentation, with a white-grayish tone throughout the posterior half of the body, as well as in the hind limbs and digits, except for darkly pigmented eyes and some parts of the animal's skin. The front half of the body and the entire head were gray or dark brown (Fig. 1), confirming a case of leucism.

Phenotypic abnormalities in coloration patterns are rare in wild populations (Bechtel, 1995) mainly due to the low survival rates (Krecsak, 2008; Virens et al., 2017). For species with diurnal activity the loss of pigmentation makes individuals more susceptible to selective pressures related to visually-oriented diurnal predators. Also, unusual coloration may be associated with morphological and immunological abnormalities (Parsons & Bonderup-Nielsen, 1995). Recently, Ayala-Monedero & Alvares-Leon (2014) reported a case of incomplete leucism in the green iguana (Iguana iguana iguana) of the Caribbean Colombian. To our knowledge, this is the first report of partial leucism in T. hispidus in Eastern Amazon and come to enhance the knowledge about the occurrence of this type of abnormality in natural populations of reptiles.

https://doi.org/10.21829/azm.2019.3502202

LITERATURE CITED

Abreu, M. S. L., Machado, R., Barbieri, F., Freitas, N. S., Oliveira, L. R. (2013) Anomalous colour in Neotropical mammals: a review with new records for Didelphis sp. (Didelphidae, Didelphimorphia) and Arctocephalus australis (Otariidae, Carnivora). Brazilian Journal of Biology, 73, 185-194.

Ayala-Monedero, R. M., Alvares-Leon, R. (2014) A report on a case of incomplete leucism in the green iguana (Iguana iguana iguana) (Squamata: Iguanidae) in the Caribbean Colombian. Boletin Cientifico Museo de Historia Natural, 18, 158-162.

Bechtel, H. B. (1995) Reptile and amphibian variants: colors, patterns and scales. Krieger Publishing, Malabar, FL.

Duellman, W. E., Trueb, L. (1994) Biology of Amphibians. The John Hopkins University Press. Baltimore, USA.

Fertl, D., Rosel, P. (2002) Albinism. Pp. 24-26. In: Perrin, W. F., Wursig, B., Thewissen, J. G. M. (Eds.). Encyclopedia of Marine Mammals. Academic Press, San Diego.

Frost, D. R. (1992) Phylogenetic analysis and taxonomy of the Tropidurus group of lizards (Iguania: Tropiduridae). American Museum Novitates, 3033, 1-68.

Frost, D. R., Rodrigues, M. T., Grant, T., Titus, T. A. (2001) Phylogenetics of the lizard genus Tropidurus (Squamata: Tropiduridae: Tropidurinae): direct optimization, descriptive efficiency, and sensitivity analysis of congruence between molecular data and morphology. Molecular Phylogenetics and Evolution, 21, 352-371.

Keely, C. C., Maldonado, S. P. (2013) Litoria raniformis (Growling Grass Frog). Leucism. Herpetological Review, 44, 297.

Kornilios, P. (2014) First report of piebaldism in scolecophidians: a case of Typhlops vermicularis (Squamata: Typhlopidae). Herpetology Notes, 7, 401-403.

Krecsak, L. (2008) Albinism and leucism among European Viperinae: a review. Russian Journal of Herpetology, 15, 97-102.

McCardle, H. B. S. (2012) Albinism in wild vertebrates. Unpublished Master thesis, Texas State University-San Marcos, Texas, 82 pp.

Miller, J. D. (2005) All about albinism. Missouri Conservationist, 66 (6), 4-7.

Moraes, L. J. C. L., Kaefer, I. L. (2015) Leucism in the Amazonian diurnal frog Anomaloglossus stepheni (Martins, 1989) (Anura: Aromobatidae). Herpetology Notes, 8, 179-181.

Noronha, J. D. C., Barros, A. B., Miranda, R. M., Almeida, E. J., Rodrigues, D. J. (2013) Record of leucism in Pseudoboa nigra (Serpents: Dipsadidae) in southern Amazon, Brazil. Herpetology Notes, 6, 81-82.

Parson, G. J., Bonderup-Nielsen, S. (1995) Partial albinism in an island population of Meadow Voles, Microtuspennsylvanicus, from Nova Scotia. The Canadian Field-Naturalist, 109 (2), 263-264.

Rodrigues, M. T. (1987) Sistematica, ecologia e zoogeografia dos Tropidurus do grupo torquatus ao Sul do Rio Amazonas (Sauria, Iguanidae). Arquivos de Zoologia do Estado de Sao Paulo, 31 (3), 105-230.

Rodriguez-Pinilla, Q., Gomez-Martinez, M. J. (2011) Leucismo incompleto en Turdus fuscater (Passeriformes: Turdidae) en los andes colombianos. Boletin Cientifico Museo Historia Natural, 15, 63-67.

Virens, J., Davis, R. A., & Doherty, T. S. (2017) Two records of amelanism in the Australian skink Ctenotusfallens (Storr, 1974). Herpetology Notes, 10, 453-455.

Patrick RIBEIRO SANCHES, Fillipe PEDROSO DOS SANTOS, Carlos Eduardo COSTA CAMPOS *

Universidade Federal do Amapa, Departamento de Ciencias Biologicas e da Saude, Laboratorio de Herpetologia, Campus Marco Zero do Equador, 68.903-419, Macapa, AP, Brazil. <patricksanchs@gmail.com>; <fillipepedrosodossantos@gmail.com>; <eduardocampos@unifap.br>

* Autor de correspondencia: <eduardocampos@unifap.br>

Recibido: 02/11/2017; aceptado: 06/12/2018; publicado en linea: 01/04/2019

Editor responsable: Gustavo Aguirre Leon

Caption: Figure 1. Leucistic adult specimen of Tropidurus hispidus found at Fortaleza de Sao Jose de Macapa, municipality of Macapa, Amapa state, Brazil.
COPYRIGHT 2019 Instituto de Ecologia, A.C.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2019 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Nota cientifica
Author:Ribeiro-Sanches, Patrick; Pedroso-Dos Santos, Fillipe; Costa Campos, Carlos Eduardo
Publication:Acta Zoologica Mexicana (nueva serie)
Date:Jan 1, 2019
Words:1087
Previous Article:DATOS PRELIMINARES SOBRE EL PAPEL DEL VENADO COLA BLANCA ODOCOILEUS VIRGINIANUS (ARTIODACTYLA: CERVIDAE) COMO DISPERSOR DE SEMILLAS.
Next Article:IMPACTS OF CHRONIC WASTING DISEASE ON A LOW DENSITY MULE DEER (ODOCOILEUS HEMIONUS) POPULATION IN THE SAN ANDRES MOUNTAINS, CHIHUAHUAN DESERT, NEW...
Topics:

Terms of use | Privacy policy | Copyright © 2022 Farlex, Inc. | Feedback | For webmasters |