A new species of Pseudocerastes with elaborate tail
ornamentation from western Iran: a very unusual new species of Pseudocerastes from the Zagros moutains of western Iran. Pseudocerastes urarachnoides is characterised by the posession of a number of long, bristle-like scales along its tail tip, giving the appearance of having an arachnid attached to the tail (hence the specific name), or, more prosaically, that of a bottlebrush.The species is only known from two preserved specimens, and the function of the "bottlebrush" remains entirely unknown. Its geographic distribution lies between that of the two other species of the genus, P. persicus and P. fieldi.

THIS VIDEO IS NOT MINE.MORE ABOUT THIS YOU CAN FIND HERE: http://www.bangor.ac.uk/~bss166/Updates/Viperinae2006.htm http://swasiazoology.tripod.com/photos.html research.calacademy.org/research/scipubs/pdfs/v57/proccas_v57_n14.pdf