Key to Grismadox species

[Females of G. rubioi, G. baueri, G. annatar sp. nov., and G. monai comb. nov. unknown]

1 Males .............................................................................................. 2

- Females............................................................................................ 11

2 vRTA absent, proximal disc of the embolus present (Pett & Perger 2021: fig. 8A, B)........ G. rubioi (Pett & Perger, 2021)

- vRTA present, proximal disc of the embolus absent (Figs 5, 7G–I, 9G–I)......................................... 3

3 Abdomen with collar of squamose setae with brachia (Figs 2C–F, 11A, D, 12A, D)................................. 4

- Abdomen without collar of squamose setae with brachia (Figs 7A, D, 8A, 9A, D).................................. 6

4 Embolus curved, with four keels, tibia I ventral spination 3-3 (Fig. 13G; Pett et al. 2022: figs 10, 11)......................................................................................... G. karugua Pett, Rubio & Perger, 2022

- Embolus straight, with two or four and half keels, tibia I ventral spination 3-2 (Figs 11G, 12G)........................ 5

5 Embolus with pre-embolar base long, three keels, carapace uniformly dark (Fig. 11A–C, G; Perger & Duperré 2021: fig. 4A–E).............................................................. G. mazaxoides (Perger & Duperré, 2021)

- Embolus without pre-embolar base, four and half keels, carapace with cephalic area dark and thoracic orange (Fig. 12A–C, G; Pett 2021: figs 3, 4, 9–11).............................................................. G. mboitui (Pett, 2021)

6 Body color light yellow or orange (Fig. 8A–C; Pett et al. 2022: figs 12, 13; Pett 2023: figs 1–4)....................... 7

- Body color darker (Figs 7A–C, 9A–C, 10A–C).............................................................. 8

7 Lateral margins of carapace lack dark bands, tibia I ventral spination 2-2, embolus with five keels, embolic extension between keels absent (Pett et al. 2022: figs 12–15)..................................... G. baueri Pett, Rubio & Perger, 2022

- Dark bands present, tibia I ventral spination 3-2, embolus with six keels, embolic extension between keels present (Fig. 8A; Pett 2023: figs 1–8)............................................................. G. monai (Pett, 2023) comb. nov.

8 Embolus with conspicuous keels (Figs 4B, C, 9G, 10D)....................................................... 9

- Embolus with inconspicuous keels or absent (Figs 4A, 14G).................................................. 10

9 Embolus wider and robust with three keels, tibia I ventral spination 2-2 (Fig. 9G–I)................... G. nazgul sp. nov.

- Embolus narrow with seven keels, tibia I ventral spination 3-2 (Fig. 10D, E)....................... G. annatar sp. nov.

10 Keels absent, tibia I ventral spination 2-2, embolus needle-shaped (Figs 4A, 7G) G. armatus (Mello-Leitão, 1922) comb. nov.

- Keels present, inconspicuous, tibia I ventral spination 3-2, embolus screw-shaped (Fig. 14G; Perger et al. 2022: figs 3C, D)........................................................................ G. elsneri Perger, Rubio & Pett, 2022

11 Abdomen with collar of squamosa setae with brachia (Figs 2C–F, 11D, E, 12D, E, 13D, E).......................... 12

- Abdomen without collar of squamosa setae with brachia (Figs 7D–F, 9D–F)...................................... 14

12 Anterior tibia spination 3-2............................................................................ 13

- Anterior tibia spination 3-3 (Fig. 13D–F, H, I; Pett et al. 2022: figs 2–7)............ G. karugua Pett, Rubio & Perger, 2022

13 CO anterolateral to ST II (Figs 3B, 12D–F, H, I; Pett 2021: figs 12, 13).......................... G. mboitui (Pett, 2021)

- CO far anterior to ST II (Fig. 11D–F, H, I; Perger & Duperré 2021: figs 6A, B).... G. mazaxoides (Perger & Duperré, 2021)

14 Tibia I ventral spination 2-2, CO larger (1.0 times the diameter of ST II), ventrally oriented (Fig. 9I, J).... G. nazgul sp. nov.

- Tibia I ventral spination 3-2, CO smaller (less 0.5 times the diameter of ST II), anteriorly oriented (Figs 7J, 14I; Perger et al. 2022: figs 5A–C).................................................................................... 15

15 Shallow ventral groove above CO, CD short (less than half the length of ST II) (Fig. 14D–F, H, I; Perger et al. 2022: figs 5A–C)................................................................. G. elsneri Perger, Rubio & Pett, 2022

- Deep ventral groove above CO, CD long (1.0 times the length of ST II) (Figs 4A, C, 6C, D, 7J, K)... G. armatus comb. nov.