The digestive system and fat body of an early-derivative oribatid mite, Archegozetes longisetosus Aoki (Acari: Oribatida, Trhypochthoniidae)
  Ultrastructure of the larval haemocytes and nephrocytes in the tick Ornithodoros (Pavlovoskyella) erraticus (Ixodoidea: Argasidae)