Tanytydeus

Khaustov, Alexander A., 2017, Review of the Paratydeidae (Acari: Prostigmata), with description of three new species, Zootaxa 4303 (2), pp. 151-212 : 207

Key to species of the genus Tanytydeus

( T. neocristatus Kandeel and Hoda, 1984 and T. amabilis ( Kandeel, 1992) are not included in the key due to their incomplete description).

1. Adults with three pairs of genital acetabulae............................................................... 2

- Adults with two pairs of genital acetabulae................................................................ 6

2. Genu I with six simple setae............................................................................3

- Genu I with seven simple setae.......................................................................... 4

3. Femur and genu II with two setae each, tarsus III with five setae....... T. simplex (Delfinado and Baker, 1974) comb. nov.

- Femur and genu II with three setae each, tarsus III with six setae.................. T. lamington Seeman and Walter, 1999

4. Genu II with four setae, genu IV with three setae............................................................ 5

- Genu II with three setae, genu IV with two setae..................................... T. cristatus Theron et al., 1969

5. Genital area with 8–10 pairs of genital setae; idiosomal length 550–685; dorsal setae lengths: c 1 23–29, c 2 38–43, d 24–30, e 21–28.................................................. T. beyzavii Khanjani, Nadri, Khanjani and Seeman, 2014

- Genital area with 6–7 pairs of genital setae, idiosomal length 455; dorsal setae lengths: c 1 15, c 2 24, d 14, e 15.................................................................................... .. T. kakadu Seeman and Walter, 1999

6. Genu I with seven simple setae, genu II with three setae, genu IV with two setae, seta l” of tibia I eupathidion-like, seta p’ of tarsus II simple, with three pairs of aggenital and two pairs of genital setae in adults................................7

- Genu I with six simple setae, genu II with two setae, genu IV with one seta, seta l” of tibia I simple, seta p’ of tarsus II eupathidion-like, with 6–7 pairs of aggenital and three pairs of genital setae in adults.................. cubanus sp. nov.

7. Idiosomal setae longer (sci 46, sce 17, c 2 26, 2 a 26, 2 b 24, 3 a 33, 3 b 19), seta k of tibia I pointed, all setae on trochanter, femur, genu and tibia II pointed..................................................... T. cf. aegyptiacus ( Soliman, 1974)

- Idiosomal setae shorter (sci 25–28, sce 8–9, c 2 14–16, 2 a 13–14, 2 b 11, 3 a 13, 3 b 9), seta k of tibia I blunt-ended, all setae on trochanter, femur, genu and tibia II blunt-ended............................................... T. kethleyi sp. nov.