Flat Mites of the World


Key characters

  • d2, e1, e2, f2 absent (Figs. 3, 4, 5)
  • h2 not extremely elongate
  • body distinctly longer than wide (Figs. 1, 2, 3)
  • anterior margin of prodorsum without notch or projection (Figs. 6, 7)
  • ventral, genital and anal plates not developed, membranous (Figs. 8, 9)
  • 1-2 pairs ps setae (Fig. 9)
  • 3 segmented palp (Fig. 10)
  • nude genua III-IV
  • true claws uncinate or pad-like
  • males with distinctly shaped posterior opisthosoma (Fig. 2)
  • usually with distinct "granular" cuticle (Fig. 1)

Similar taxa

Afronychus - c2 absent (present in A. mulibrinus); e1 present (absent in A. cliffortiae); e2, f2 present

Number of species

approx. 23




World wide, with most species recorded from Nearctic region (8 spp.) and Oriental (5 spp.).

Countries include: Australia, Egypt, India, Indonesia, Iraq, New Zealand, South Africa, Sri Lanka, USA.


Relatively few families, mostly monocots. By far the most common host family is Poaceae, followed by Bromeliaceae and Asteraceae.


  • red to orange when alive
  • eggs lemon to orange

Fig. 1. Dolichotetranychus sp. female dorsum and venter.


Fig. 2. Dolichotetranychus adult female (left) and male (right) dorsum (images: Philip Johnson, USDA-APHIS-PPQ).


Fig. 3. Dolichotetranychus floridanus female dorsum (after Baker 1956).


Fig. 4. Dolichotetranychus sp. female dorsum, posterior opisthosoma.


Fig. 5. Dolichotetranychus sp. female dorsum, posterior opisthosoma.


Fig. 6. Dolichotetranychus floridanus female dorsum.


Fig. 7. Dolichotetranychus sp. female prodorsum, without projections or notches.


Fig. 8. Dolichotetranychus floridanus female venter.


Fig. 9. Dolichotetranychus female posterior venter, indicating genital region.


Fig. 10. Dolichotetranychus floridanus female, 3 segmented palps (indicated by arrow).