1. 
   Ptilium
   Ptilium is a genus of featherwing beetles, Ptiliidae, recognisable by three longitudinal grooves on the pronotum.
   Found op http://www.probertencyclopaedia.com/browse/BPA.HTM
   
   
2. 
   Ptilium
   [moss] Ptilium is a genus of mosses with very broad worldwide occurrence. This genus is within the family Hypnaceae, in the class Bryopsida, subclass Bryidae and order Hypnales. ==Ecology== Some of these species occur on the floor of Canadian boreal forests; an example of this occurrence is ...
   Found op http://en.wikipedia.org/wiki/Ptilium_(moss)
   
   

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