The genus Salfacarus (Acari: Opilioacarida) in Madagascar Ma. Magdalena Vázquez G. Hans Klompen Zootaxa 2010 2010-05-24 2482 1 21 643MV Van der Hammen 1979 [402,532,1637,1663] Arachnida Opilioacaridae Salfacarus Animalia Opilioacarida 18 19 Arthropoda genus    1 Ratio of dorsolateral setae on tibia IV to width of tibia IV distinctly exceeding 1.0; legs IV in female may be longer than legs I ............................................................................................................  S. robustipesVan der Hammen 1977  - Ratio less than 1.0; legs IV always shorter than legs I ................................................................................................ 2   2 Ovipositor with one or more distinct pairs of spinose structures near its base ( Figs. 12, 13) ..................................... 3  - Ovipositor with trachea-like structures, patches of differentiated cuticle or no specific structures ( Figs. 26, 27) ..... 4   3 Palp femur with a very large (15–19) number of papilliform setae; movable digit of male chelicera with 3–5 ventral denticles ..................................................................................................................................  S. antsirananensis  n. sp.  - Palp femur with a much smaller (6–12) number of papilliform setae; movable digit of male chelicera with very few ventral denticles (1–2) ..................................................................................................................  S. kirindiensis  n. sp.   4 Pregenital setae in the female tapering; ovipositor with a pair of trachea-like structures ( Fig. 27) .............................. ........................................................................................................................................................  S. ranobensis  n. sp.  - Pregenital setae in female papilliform; ovipositor with patches of differentiated cuticle, but without large basal structures.............................................................................................................................................................................. 5   5 Ovipositor with one large basal, and two much smaller distal patches of differentiated cuticle.................................... ..............................................................................................................................  S. legendreiVan der Hammen 1977  - Ovipositor with all three patches of differentiated cuticle of similar size ( Fig. 26) ..................  S. mahafaliensis  n. sp.