Flat Mites of the World

Urigersonus

Key characters

  • c2, d2, e2, f2 absent (Figs. 1, 2, 3)
  • v2, sc1, c1, d1, e1 minute (Figs. 1, 2)
  • sc2, f3 extremely elongate (Figs. 1, 2, 3); held at right angles to body when alive (Fig. 4)
  • h2 not elongate
  • body extremely flat (Fig. 4)
  • anterior margin of prodorsum with forked projection
  • ventral, genital and anal plates not developed (Figs. 5-6)
  • 3 pairs ps setae (Figs. 5-6)
  • 4 segmented palp; solenidion inserted at base of palp tarsus not at tip

Similar taxa

Tenuipalpus - has seta h2 elongate; setae sc2, f3 similar to other dorsal setae

Ultratenuipalpus sensu stricto - no dorsal setae elongate

Number of species

One - U. bunyai

Authority

Mesa, Ochoa and Evans

Distribution

Australia

Hosts

Araucaria bidwilli (Araucariaceae)

Colour

  • bright red with some black markings when alive; dorsal setae white (Fig. 6)
  • eggs red

Remarks

Seta f3 is not elongate in the larvae.

<em>Urigersonus</em>

Fig. 1. Urigersonus bunyai female dorsum (after Smiley & Gerson 1995).

<em>Urigersonus</em>

Fig. 2. Urigersonus bunyai female dorsum (image: Gary Bauchan, USDA-ARS).

<em>Urigersonus</em>

Fig. 3. Urigersonus bunyai female dorsum.

<em>Urigersonus</em>

Fig. 4. Urigersonus bunyai female live.

<em>Urigersonus</em>

Fig. 5. Urigersonus bunyai female venter, with detail of genital region.

<em>Urigersonus</em>

Fig. 6. Urigersonus bunyai female venter, detail of genital region (image: Gary Bauchan, USDA-ARS).