Key to species of Fernandezina

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

- Females............................................................................................ 18

2(1) Embolus with well-developed basal ledge (Platnick et al. 1999, figs. 20–21)...................................... 3

- Embolus without well-developed basal ledge (Ott & Ott 2014, figs 4–5) or without basal ledge (Figs 5b, e).............. 5

3(2) Basal ledge of the embolus with rounded apex in ventral view (Platnick et al. 1999, fig. 20); proportionally smaller palpal bulb and longer, more sinuous embolus.............................................................. F. maldonado

- Basal ledge of the embolus with square apex in ventral view (Platnick 1975, fig. 86; Platnick et al. 1999, fig. 32); proportionally larger palpal bulb and shorter, less sinuous embolus.......................................................... 4

4(3) Prolaterally widening of the embolus with pointed tip (Platnick 1975, fig. 86)................................ F. pelta

- Prolaterally widening of the embolus with rounded border (Platnick et al. 1999, fig. 32)..................... F. pulchra

5(4) Embolus as long as the cymbium (Martínez & Gutierrez 2021, fig. 1e) or longer than the cymbium (Cala-Riquelme et al. 2018, figs 26–27, 31–32).................................................................................... 6

- Embolus shorter than the cymbium (Figs 5b, e).............................................................. 9

6(5) Palpal bulb without a proximal constriction (Cala-Riquelme et al. 2018, figs 26–27)....................... F. andersoni

- Palpal bulb with conspicuous proximal constriction (Cala-Riquelme et al. 2018; Platnick et al. 1999)................... 7

7(6) Embolus with conspicuous prolateral, subdistal ledge and bifid apex (Martínez & Gutierrez 2021, fig. 1e)..... F. grismadoi

- Embolus without any subdistal ledge and bifid apex.......................................................... 8

8(7) Embolus proportionally very long and curved (almost 2x the cymbium length) and very long, narrow neck of the palpal bulb, almost as long as the cymbium (Cala-Riquelme et al. 2018, figs 31–33)................................. F. eduardoi

- Embolus proportionally long and curved (almost 1.5x the cymbum length) and short neck of the palpal bulb (Platnick et al. 1999, figs 22–24)............................................................................... F. ilheus

9(5) Embolus with subdistal retrolateral laminar extension (Ott & Ott 2014, figs 4–5).................................. 10

- Embolus without subdistal retrolateral laminar extension (Figs 5a, d)........................................... 11

10(9) Embolus with inconspicuous basal ledge and semicircular retrolateral laminar extension (Ott & Ott 2014, figs 4–5).. F. nica

- Embolus without basal ledge and irregular retrolateral laminar extension (Castro et al. 2015, fig. 6c)......... F. jurubatiba

11(9) Embolus straight (Platnick et al. 1999, figs 29–31) or almost straight (Ramírez & Grismado 1996, fig. 1)............... 12

- Embolus conspicuously curved (Figs 5a–b, d–e)............................................................ 15

12(11) Embolus with conspicuous neck at the tip (Buckup & Ott 2004, fig. 7; Ramírez & Grismado 1996, fig. 1).............. 13

- Embolus uniformly straight, without apical neck (Platnick 1975, figs 90–91)..................................... 14

13(12) Embolus inserted in the distal half of the palpal bulb (Castro et al. 2015, fig. 8b–c; Ramírez & Grismado 1996, fig. 1)... F. tijuca

- Embolus inserted in the proximal half of the palpal bulb (Buckup & Ott 2004, fig. 7)........................... F. saira

14(12) Embolus with a folded lateral ridge (Platnick 1975, figs 90–91)........................................... F. acuta

- Embolus straight, without lateral ridges............................................................. F. dasilvai

15(11) Embolus inserted in the distal half of the palpal bulb (Castro et al. 2015, fig. 8b–c; Ramírez & Grismado 1996, fig. 1).... 16

- Embolus inserted in the proximal half of the palpal bulb (Buckup & Ott 2004, fig. 7)............................... 17

16(15) Embolus with a bifid apex (Platnick 1975, fig. 92)..................................................... F. divisa

- Embolus without bifid apex (Figs 5d–e)..................................................... F. angeloi sp. nov.

17(15) Embolus with a retrolateral insertion (Figs 5a–b)............................................ F. fernandoi sp. nov.

- Embolus with ventral insertion (Grismado 2002, fig. 3)................................................. F. takutu

18(1) Female internal genitalia with short receptacles (Cala-Riquelme et al. 2018, fig. 34; Platnick 1975, fig. 20)............. 19

- Female internal genitalia with very developed and globose receptacles (Fig. 5c)................................... 20

19(18) Receptacles thin and curved at the tip, wider at the base (Cala-Riquelme et al. 2018, fig. 34)................. F. eduardoi

- Receptacles small and rounded (Platnick 1975, fig. 20)................................................. F. acuta

20(18) Receptacles apart from the pore plates, anteriorly positioned (Fig. 5c)........................................... 21

- Receptacles positioned dorsally to the pore plates (Platnick et al. 1999, fig. 27)................................... 22

21(20) Pore plates with two rounded branches, directed anteriorly (Cala-Riquelme et al. 2018, fig. 28).............. F. andersoni

- Pore plates with two thin branches, directed posteriorly (Fig. 5c)................................ F. fernandoi sp. nov.

22(20) Receptacles ovoid or semicircular, without constrictions (Platnick 1975, fig. 89).................................. 23

- Receptacles with constrictions (Castro et al. 2015, fig. 8a).................................................... 25

23(22) Receptacles superimposed medially (Castro et al. 2015, fig. 6a)...................................... F. jurubatiba

- Receptacles separated medially (Platnick 1975, fig. 89)...................................................... 24

24(23) Receptacles with pointed posterior border (Platnick 1975, fig. 89).......................................... F. pelta

- Receptacles with rounded posterior border......................................................... F. dasilvai

25(22) Pore plates widely separated from each other (Ott & Ott 2014, fig. 13)...................................... F. nica

- Pore plates very close to each other, medially (Castro et al. 2015, fig. 8a)........................................ 26

26(25) Receptacles with anterior half wider than the posterior half (Castro et al. 2015, fig. 8a)......................... F. tijuca

- Receptacles with posterior half wider than the anterior half (Piacentini et al. 2013, fig. 6b).................... F. pulchra