Genus Rhopalochernes Beier, 1932

Rhopalochernes Beier, 1932: 140 .

Type species: Chelifer ohausi Tullgren, 1907, by original designation.

Key to species of the genus Rhopalochernes (updated from Beier 1932)

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

Females............................................................................................. 5

2. Eyeless (Figs. 1C, 4C); serrula exterior of chelicera with 11 blades.............................................. 3

Eye-spots present; serrula exterior of chelicera with 15 or more blades........................................... 4

3. Carapace with 2 conspicuous, deep furrows; tarsus of leg IV slender, 4.00‒4.25 × longer than deep (Fig. 1C, 2B)................................................................................. Rhopalochernes luiscarlosi sp. nov.

Carapace with 2 shallow, indistinct furrows; tarsus of leg IV more robust, 2.75‒3.75 × longer than deep (Fig. 4C, 5B).............................................................................. Rhopalochernes catalinae sp. nov.

4. Femur + patella of leg IV slender, 3.50 × longer than deep; movable chelal finger shorter than chelal hand without pedicel (0.94 × longer than hand).............................................................................. R. ohausi

- Femur + patella of leg IV robust, 2.7 × longer than deep; movable chelal finger longer than chelal hand without pedicel (1.25 × longer than hand)............................................................................. R. beckeri

5. Eyeless............................................................................................. 6

- Eye-spots present..................................................................................... 8

6. Cheliceral hand with 4 setae............................................................................. 7

- Cheliceral hand with 6 setae.................................................................... R. insulanus

7. Carapace with 2 deep furrows; spermathecae with 2 sacs with long and narrow ducts (Figs. 2C, 7B)............................................................................................ Rhopalochernes luiscarlosi sp. nov.

- Carapace with 2 shallow furrows; spermathecae with 2 sacs with short and thicker ducts (Figs. 4C, 7A).......................................................................................... Rhopalochernes catalinae sp. nov.

8. Trichobothria it, ist, isb and ib restricted to basal half of fixed finger (see Beier, 1955 Fig. 10)................ R. titschacki

- Trichobothria it, ist, isb and ib not restricted to basal half of fixed finger.......................................... 9

9. Pedipalpal femur at least 3.00 × longer than broad.......................................................... 10

- Pedipalpal femur less than 3.00 × longer than broad......................................................... 11

10. Chelal hand (without pedicel) and movable chelal finger equal in length.................................... R. ohausi

- Chelal hand (without pedicel) longer than movable chelal finger....................................... R: germainii

11. Chela (with pedicel) slender, at least 3.00 × longer than broad................................................. 12

- Chela (with pedicel) robust, less than 3.00 × longer than broad....................................... R. antillarum

12. Nodus ramosus midway between st and t; femur + patella IV stout, 3.30 × longer than deep............... R. panamensis

- Nodus ramosus proximal to st; femur + patella IV slender, 3.73 × longer than deep...................... R. chamberlini