New records of the feather mite Pterolichus obtusus Robin, 1877 (Acariformes: Astigmata: Pterolichidae) parasitizing chickens Gallus gallus domesticus (L.) (Galliformes: Phasianidae) in Brazil
  Mite fauna (Acari) associated with the poultry industry in different laying hen management systems in Southern Brazil: a species key