Rhacochelifer, Beier, 1932

Hernández-Corral, Jesús, Zaragoza, Juan A. & Micó, Estefanía, 2018, New species of Pseudoscorpiones (Arachnida) from tree hollows in a Mediterranean oak forest in Spain, Zootaxa 4497 (2), pp. 201-225 : 221

Key to adult males of the Rhacochelifer species from the Iberian Peninsula [ Rhacochelifer tingitanus (L. Koch, 1873) excluded]

1 Elongated keels present on posterolateral corners of carapace and anterior tergites.................................. 2

- Without elongated keels on posterolateral corners of carapace and anterior tergites.................................. 3

2 Larger, pedipalpal femur about 0.90 and chela+ about 1.50 mm long............. Rhacochelifer peculiaris (L. Koch, 1873) .

- Smaller, pedipalpal femur 0.66 and chela+ 0.95 mm long............................................. R. gaeli n. sp.

3 Anterior genital sternite with some distinctly forked setae...................................................... 4

- Anterior genital sternite with all setae simple and acuminate.................................................... 5

4 Tergites VI–X lacking medial anterior seta; smaller species, pedipalp femur length 0.56–0.64 mm, patella 2.4–2.5× longer than broad (0.51–0.56 mm), chela+ 3.3–3.4× (1.00 mm)........................... Rhacochelifer pinicola ( Nonídez, 1917) .

- Tergites VI–X with one medial anterior seta; larger species, pedipalp femur length 0.81 mm, patella 2.2× longer than broad (0.66 mm), chela+ 3.2× (1.29 mm)................................................. Rhacochelifer nonidezi n. sp.

5 Pedipalpal femur and patella with coarser granules besides normal granulation.... Rhacochelifer maculatus (L. Koch, 1873) .

- Pedipalpal femur and patella without coarser granules........................ Rhacochelifer disjunctus (L. Koch, 1873) .