Iphidozercon

Gwiazdowicz, D. J. & Halliday, R. B., 2008, The Australian species of Iphidozercon (Acari: Ascidae), Zootaxa 1921, pp. 47-68 : 49

Key to the world species of Iphidozercon (females)

Information on I. californicus and I. validus was obtained from published descriptions and illustrations, and for the other species, by examination of types.

1. Posterior end of peritreme extending beyond stigma ( Fig. 2).....................................................................2

- Posterior end of peritreme not extending beyond stigma ( Fig. 18) .............................................................6

2. Post-stigmatic section of peritreme short ( Fig. 2).......................................................................................3

- Post-stigmatic section of peritreme long ( Fig. 10)......................................................................................4

3. Dorsal shield with colliculate sculpture ( Fig. 1); dorsal shield setae J4, Z3 not on tubercles; genu II with 9 setae (av 1 absent) ......................................................................................... Iphidozercon australis sp. nov.

- Dorsal shield with foveate sculpture; dorsal shield setae J4, Z3 inserted on tubercles; genu II with 10 setae (av 1 present) ............................................................................................. Iphidozercon validus Karg, 1996

4. Anal shield longer than wide ( Fig. 10)........................................................................................................5

- Anal shield wider than long.............................................. Iphidozercon poststigmatus Gwiazdowicz, 2003

5. Posterior dorsal shield setae uniform in length ( Fig. 9)....................... Iphidozercon corticalis Evans, 1958

- Dorsal shield setae Z4, Z5 more than double length of J1-J5.......... Iphidozercon californicus Chant, 1963

6. Dorsal shield with sculpturing in anterior half only ( Fig. 25); ventral idiosoma with one pair of large metapodal plates, without other small sclerotised platelets ( Fig. 26); movable digit of chelicera with two teeth ( Fig. 28)...............................................................................................................................................7

- Dorsal shield with foveate sculpture over its whole surface ( Fig. 17); ventral idiosoma with a pair of small metapodal plates and five extra pairs of small sclerotised platelets bearing pores ( Fig. 18); movable digit of chelicera with three teeth ( Fig. 20) .......................................................... Iphidozercon foveatus sp. nov.

7. Dorsal shield setae in J series short, not reaching bases of following setae; opisthonotal part of dorsal shield with areolate sculpture ............................................................. Iphidozercon gibbus (Berlese, 1903)

- Dorsal shield setae J series long, almost reaching bases of following setae ( Fig. 25); opisthonotal part of dorsal shield with granulate-tuberculate sculpture ( Fig. 25) ......................... Iphidozercon walteri sp. nov.