Authors retain the copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution 4.0 International Public License (CC-BY-4.0) that allows others to share the work with an acknowledgment of the work's authorship and initial publication.
The author describes a very rare case of dicephalism in a Podarcis sicula found in Ragusa (Italy). This is the first account in the world of a malformation of this sort in Podarcis spp.