Key to the identification of the species of Charinus in eastern South America

1. Leg IV distitibia with four trichobothria in frontal and caudal series; leg IV basitibia with three pseudo-articles ............................................................................. C. alagoanus sp. nov. (Figs 44–46)

– Leg IV distitibia with five or six trichobothria frontal and caudal series; leg IV basitibia with two or four pseudo-articles ........................................................................................................................... 2

2. Leg IV distitibia with five trichobothria in frontal and caudal series ............................................... 3

– Leg IV distitibia with six trichobothria in frontal and caudal series .............................................. 12

3. Median eyes absent............................................................................................................................ 4

– Median eyes present .......................................................................................................................... 5

4. Tibia of leg I with 21 articles; leg I tarsus with 37 articles; leg IV basitibia with two pseudoarticles........................................................................................ C. monasticus sp. nov. (Figs 69–70)

– Tibia of leg I with 23 articles; leg I tarsus with 41 articles; leg IV basitibia with four pseudoarticles............................................................................... C. troglobious Baptista & Giupponi, 2002

5. Pedipalp femur with three dorsal spines; pedipalp patella with two ventral spines ............................ ............................................................................................................... C. una sp. nov. (Figs 78–79)

– Pedipalp femur with more than three dorsal spines; pedipalp patella with more than two ventral spines ................................................................................................................................................. 6

6. Median and lateral eyes reduced........................................................................................................ 7

– Median and lateral eyes unmodified.................................................................................................. 8

7. Median ocular tubercle present but reduced; reduced median eyes with dark pigmentation; pedipalp patella dorsal spine IV two-thirds length of dorsal spine III ............................................................... .............................................................................. C. taboa Vasconcelos, Giupponi & Ferreira, 2016

– Median ocular tubercle absent, reduced eyes situated directly on tegument; reduced median eyes unpigmented; pedipalp patella dorsal spine IV one-fifth length of dorsal spine III ............................ .......................................................................................... C. spelaeus Vasconcelos & Ferreira, 2017

8. Cheliceral basal segment with long (distinct) tooth adjacent to bifid tooth ........................................ ..................................................................................... C. sooretama sp. nov. (Figs 7E–F, 9C–D, 75)

– Cheliceral basal segment with short (indistinct) tooth adjacent to bifid tooth .................................. 9

9. Base of female gonopod unsclerotized ................... C. euclidesi sp. nov. (Figs 6C–D, 9A–B, 61–63)

– Base of female gonopod sclerotized................................................................................................ 10

10. Pedipalp tibia with two ventral spines ..................................... C. diamantinus sp. nov. (Figs 57–60)

– Pedipalp tibia with one ventral spine................................................................................................11

11. Curved carina present between ocular triads and lateral margin of carapace; cheliceral claw with nine teeth............................................................................................ C. souzai sp. nov. (Figs 76–77)

– Curved carina absent between ocular triads and lateral margin of carapace (Fig. 48A–B); cheliceral claw with six or seven teeth..................................... C. brasilianus Weygoldt, 1972 (Figs 8C–D, 48)

12. Leg I tarsus with 28 articles.................................................................. C. montanus Weygoldt, 1972

– Leg I tarsus with 41 articles............................................................................................................. 13

13. Carapace anterior margin with eight or ten setae ............................................................................ 14

– Carapace anterior margin with six setae.......................................................................................... 16

14. Carapace anterior margin with ten setae; median ocular tubercle absent; pedipalp patella with spine between ventral spine I and distal margin .......................... C. eleonorae Baptista & Giupponi, 2003

– Carapace anterior margin with eight setae; median ocular tubercle present; pedipalp patella with setiferous tubercles between ventral spine I and distal margin ....................................................... 15

15. Pedipalp tarsus with two dorsal spines (Fig. 47D) ...................... C. apiaca sp. nov. (Figs 5A–B, 47)

– Pedipalp tarsus with three dorsal spines ......................... C. caatingae Vasconcelos & Ferreira, 2016

16. Carapace anterior margin projected anteriorly ............ C. santanensis Vasconcelos & Ferreira, 2017

– Carapace anterior margin rounded................................................................................................... 17

17. Leg I tarsus, first article equal in length to subsequent three articles.................................................. ......................................................................... C. jibaossu Vasconcelos, Giupponi & Ferreira, 2014

– Leg I tarsus, first article equal in length to all subsequent articles ................................................. 18

18. Pedipalp tarsus with three dorsal spines .......................................................................................... 19

– Pedipalp tarsus with two dorsal spines ............................................................................................ 23

19. Cheliceral claw with four teeth.................................................. C. mysticus Giupponi & Kury, 2002

– Cheliceral claw with 9–13 teeth ...................................................................................................... 20

20. Pedipalp coxa, rounded dorsal carina containing seven setae ......................................................... 21

– Pedipalp coxa, rounded dorsal carina containing two or five setae................................................. 22

21. Pedipalp patella with six ventral spines (Fig. 49F); cheliceral claw with 13 teeth ............................. .................................................................................. C. carinae sp. nov. (Figs 3A–B, 4A–B, 49–51)

– Pedipalp patella with three or four ventral spines; cheliceral claw with ten teeth............................... .......................................................................................................... C. goitaca sp. nov. (Figs 64–65)

22. Pedipalp coxa, rounded dorsal carina containing five setae; pedipalp patella with six dorsal spines .................... C. ruschii Miranda, Milleri-Pinto, Gonçalves-Souza, Giupponi & Scharff, 2016

– Pedipalp coxa, rounded dorsal carina containing two setae; pedipalp patella with four dorsal spines ..................................................................................... C. carioca sp. nov. (Figs 6E–F, 52–53)

23. Pedipalp coxa, rounded dorsal carina containing no setae .............................................................. 24

– Pedipalp coxa, rounded dorsal carina containing setae ................................................................... 26

24. Pedipalp patella with three dorsal spines............................................................................................. .................................. C. acaraje Pinto-da-Rocha, Machado & Weygoldt, 2002 (Figs 7A–B, 8A–B)

– Pedipalp patella with five dorsal spines........................................................................................... 25

25. Pedipalp femur with four dorsal spines ..................... C. renneri sp. nov. (Figs 6A–B, 10I–J, 73–74)

– Pedipalp femur with five dorsal spines..... C. asturius Pinto-da-Rocha, Machado & Weygoldt, 2002

26. Pedipalp femur with five dorsal spines......................................... C. cearensis sp. nov. (Figs 54–56)

– Pedipalp femur with four dorsal spines ........................................................................................... 27

27. Pedipalp femur with five ventral spines........................................................................................... 28

– Pedipalp femur with four ventral spines.......................................................................................... 29

28. Pedipalp femur with secondary row of dorsal spines; pedipalp patella, distance from ventral spine I to distal margin half length of spine ...................................................... C. puri sp. nov. (Figs 71–72)

– Pedipalp femur without secondary row of dorsal spines; pedipalp patella, distance from ventral spine I to distal margin greater than length of spine ............... C. iuiu Vasconcelos & Ferreira, 2016

29. Cheliceral claw with up to 13 teeth; median and lateral eyes reduced................................................ ......................................................................... C. potiguar Vasconcelos, Giupponi & Ferreira, 2013

– Cheliceral claw with 11 teeth; median and lateral eyes unmodified.................................................... ..................................................................................................... C. imperialis sp. nov. (Figs 66–68)