First record of ectrodactyly in the family mabuyidae : aphalangia on the posterior extremities of notomabuya frenata (Cope, 1862) from Guairá department, Paraguay

Abstract

Bone malformations such as polydactyly, brachydactyly, ectrodactyly among others observed in different animal groups. Numerous authors consider that one of the most common morphological anomalies in tetrapods is polydactyly, which is frequently found in amphibians (Borkin & Pikulik, 1986, Lada, 1999, Diego-Rasilla, 2000, Piha et al., 2006, Sas & Kovacs, 2006, Cruz-Pérez et al., 2009, Galan, 2011, Hinckley et al. 2015). However, bone malformations in reptiles seem to be rare, although the rising number of reported cases can indicate that such events are increasing, or could equally reflect greater effort by researchers irrespective of the actual incidence rate. The most common are dicephalus cases in Testudinids and Serpentes (Payen, 1995, Albuquerque et al., 2010), and polydactyly in Testudinids, Chamaeleonids, Iguanids, Gekkonids and Lacertids (Carretero et al., 1995, Cuadrado, 1996, Martínez-Silvestre et al., 1998, Pelegrin, 2007, Minoli et al., 2009, Bauer et al., 2009, Lazié & Crnobrnja-Isailović, 2012, Megía, 2012, Monte de Andrade et al., 2015).