Key to the Tydeidae and Triophtydeidae from Brazil

(Based partially on the keys of André, 1980; Kaźmierski, 1996, 1998b).

1 Genua II, III and IV without setae............................................................ (Pretydeinae)…2

- At least genu II with setae.................................................... (Tydeinae and Triophtydeinae)…5

2(1) Tibia I with solenidion and trochanter II with tactile setae, body reticulated........................................ 3

- Tibia I without solenidion and trochanter II without tactile setae, body with striae............. Prelorryia labrusca sp. nov.

3(2) Dorsal opisthosomal setae: c1, d1, e1, f1 and f2 strongly barbed, longer or equal to half distance to the basis of next setae............................................................................. Pretydeus henriandrei Kaźmierski

- Dorsal opisthosomal setae not so strongly barbed and much shorter.............................................. 4

4(3) Dorsum incompletely reticulated except for median, evenly reticulated area of prodorsum, without raised areas......................................................................... Pretydeus curiosa (Ueckermann & Smith-Meyer)

- Dorsum completely reticulated, with raised areas and regular lobes.......................... Pretydeus panitae (Baker)

5(1) Tarsus I with 10 setae; at least four setae on femur I; genu II and III each with two setae...... Triophtydeus lebruni (André)

- Tarsus I with eight setae; at most three setae on femur I; genu II and III never with two setae each........... (Tydeinae)…6

6(5) Femur IV nude; all dorsal setae similar in shape: flat, spatulate, but not expanded distally..... Afrotydeus kenyensis (Baker)

- Femur IV with one seta, dorsal setae variously shaped........................................................ 7

7(6) Femur III with two setae and trochanter II and IV each with one seta.............................. ( Brachytydeus)…8

- Femur III with one seta or trochanter II and IV nude or with setae ( Neolorryia and Tydeus).......................... 10

8(7) Dorsal setae ro, la, ex serrated and remaining setae on dorsal spatulated, seta p' ζ not T-shaped distally............................................................................................. Brachytydeus podocarpa (Baker)

- Dorsal setae smooth, all dorsal setae similar in shape, seta p' ζ with T-shaped tip................................... 9

9 (8) Dorso–central region between setae d1 reticulated; dorsal setae expanded distally........ Brachytydeus formosa (Cooreman)

- Dorso–central region between setae d1 striate; dorsal setae acute.............. Brachytydeus scutatus Silva, Rocha & Ferla

10(7) Femur I with two setae; genu III and IV nude. Setae ps1 absent.................................... ( Neolorryia)…11

- Femur I with three setae; genu III and IV each with one seta. Setae ps1 present.......................... ( Tydeus)…12

11(10) Female with four pairs of genital setae (g1–4); setae f1 shorter than ½ of distance f1-h1........ Neolorryia pandana (Baker)

- Female with six pairs of genital setae (g1–6); setae f1 longer than ½ of distance f1–h1........... Neolorryia boycei (Baker)

12(10) Femur II with three setae. Dorsal ornamentation of a “basketweave” type ........................ Tydeus manoi sp. nov.

- Femur II with two setae. Dorsum striate................................................................... 13

13(12) Dorsal idiosomal setae similar in shape, all dorsal setae smooth and acute; four pairs of genital setae (g1–4)............................................................................................. Tydeus riopardensis sp. nov.

- Dorsal idiosomal setae different or similar in shape, not all dorsal setae smooth and acute; six pairs of genital setae (g1–6)…14

14(13) Dorsal idiosomal setae different in shape, five pairs of setae on opisthosoma spatulate (f1, f2, h1, h2 and ps1) and rest slightly serrated....................................................................... Tydeus californicus (Banks)

- All dorsal idiosomal setae similar in shape, slightly lanceolate and serrate..................... Tydeus costensis (Baker)