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Lab Keys

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Mite Key
Mite Anatomy & Terms

1. Mite with elongate body & very short stumpy legs.
     Found in the follicles of various animals. ........ Demodex
2. Mites with round to oval bodies & distinct legs. .......... Go to: 3 & 4


3. Mites with a distinct abdominal region and long digitiform palps.
     Found on the surface of hosts .......... Go to: 5 & 6
4. Mites with a NON-distinct abdominal region and short compact palps.
     Not found on the surface of hosts .......... Go to: 7, 8, & 9


5. Anus is located in the anterior half of the anal plate,
      Mite found on poultry at all times. .......... Ornithonyssus
6. Anus is located in the posterior half of the anal plate,
      Mite in roost by day; on poultry at night. .......... Dermanyssus


7. Mite found in the epidermis of various animals,
      Epimera do Not fuse to form distinct shapes .......... Go to: 10 & 11
8. Mite found in the epidermis of various animals,
      1st epimera fuse to form a Y-shape .......... Go to: 12 & 13
9. Mite found in the external ear canal of cats & dogs,
      1st & 2nd epimerae fuse to form a triangular shape .......... Otodectes


10. Caruncle (sucker) on long segmented pedicels (stalks)
      Found under large scabs on host's body or ears .......... Psoroptes
11. Caruncle (sucker) on short pedicels (stalks)
      Found under crusty scabs on host's appendages .......... Chorioptes


12. Caruncle (sucker) on long UNsegmented pedicels (stalks),
     Mite with triangular scales on its dorsal surface,
     Anus at posterior margin of the body,
     Mite infects a variety of animals .......... Sarcoptes
13. Caruncle (sucker) on long UNsegmented pedicels (stalks),
     Mite withOUT triangular scales on its dorsal surface,
     Anus on dorsal surface of the body,
      Mite infects cats .......... Notoedres


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NC State College of Veterinary Medicine
1060 William Moore Drive
Raleigh, NC 27607