Reference

Johanna E. Wegener, Sebastian Swoboda, Oliver Hawlitschek, Michael Franzen, Van Wallach, Miguel Vences, Zoltan T. Nagy, S. Blair Hedges, Jörn Köhler, Frank Glaw (2013): Morphological variation and taxonomic reassessment of the endemic Malagasy blind snake family Xenotyphlopidae – Spixiana, Zeitschrift für Zoologie – 036: 269 - 282.