Hello Vinicius,

Hall’s chapter on Ptiliidae in American Beetles, vol.1 may help you.  In addition, pay attention to Henry Dybas’ papers, who dealt with Neotropical featherwing fauna during second half of the last century and to the last paper of Michael Darby: Studies of Bolivian Ptiliidae (Coleoptera) 1: The genus Cissidium Motschulsky with six new species Zootaxa 3937 (1): 179–190 (24 Mar. 2015). (To my opinion M.Darby has published the best illustrated key for this family: Ptiliidae in Beetles of Britain and Ireland, vol.1.)  If you will be in trouble with your material just contact Michael or another well-known specialist of World Ptiliidae Mikael Sorensson.

Hope this will help you to start.

Good luck!

Igor

Great!

Thank you so much Igor. This information will definitely help me to start.

My colleague Michael Darby will be very happy to help: [email protected]

Thanks Maxwell. 

Yes, Ptiliidae  Beetles are featherwing beetles. Tough rosturm, clavate to serrate antennae, red platra, fore leg short , hindleg tough and strong, half leeathary wings with black spots or dark lines.