Salfacarus ranobensis Vázquez & Klompen,

Ma. Magdalena Vázquez G. & Hans Klompen, 2010, The genus Salfacarus (Acari: Opilioacarida) in Madagascar, Zootaxa 2482, pp. 1-21: 15-19

publication ID 10.5281/zenodo.893912

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scientific name

Salfacarus ranobensis Vázquez & Klompen

n. sp.

Salfacarus ranobensis Vázquez & Klompen  n. sp.

( Figs. 27–36View FIGURES 26 – 27View FIGURES 28 – 31View FIGURES 32 – 34View FIGURES 35 – 36)

Diagnosis. Ovipositor without long terminal setae, small setae or glands, or large spinose structures, but with a pair of large trachea-like structures near its base ( Fig. 27View FIGURES 26 – 27). Female with ribbed, tapering setae in the genital region. The latter characteristic has not been observed in any other Salfacarus  species in Madagascar (it was reported for S. lawrencei  from South Africa).

Description. Based on observations on 9 protonymphs, 15 deutonymphs, 13 tritonymphs, 2 females, 5 males. Larva unknown.

Gnathosoma. Chelicera ( Fig. 28View FIGURES 28 – 31). Basal segment without setae in PN and some DNs. One seta added in some DNs and all TNs and adults, fixed digit with 3 setae in all known instars. Axial seta on fixed digit lightly barbed, other cheliceral setae smooth. Dorsal (id) and antiaxial (i α) lyrifissure well developed in most nymphs and adults, not observed in PN. Fixed digit with 1, rarely 2, teeth, movable digit with 1–2 teeth and a well developed terminal hook. Movable digit with 1–2 ventral denticles in PN and DN, 2–3 in TN, and 3, rarely 4, in adult. Internal surface of movable digit with a small sensillum (arrow).

Subcapitulum ( Fig. 29View FIGURES 28 – 31). All 4 pairs of paralabial setae present: pl1 small, conical; With’s organ (pl2) membranous; rutella (pl3) with 1 distinct row of 5 teeth, inserted dorso-laterally; pl4 very small, inserted dorsal on subcapitulum (not observed in PN). In addition, adults with 4 circumbuccal (cb), and 5–8 median and subcapitular (vm (in part), lvm, ldm, vp, lvp) setae. Males may have fewer median and subcapitular (5–6) than females, but sampling inadequate. PN, DN and TN similar but number of median and subcapitular setae smaller, 2, 3, and 3–5, respectively. Lateral lips with distinct canals in all instars.

Palp. Adult ( Figs. 30–31View FIGURES 28 – 31). Trochanter with 5 ribbed, tapering (= r-type) setae; femur with 9 (female) or 6 (male) papilliform (= p-type) and 12 r-type setae; genu with 7 (females) or 3–4 (males) p-type and 27–35 rtype setae. Tibia and tarsus partially fused. Tibia with approximately 5 smooth (= s-type) and 55 r-type setae. Palp tarsus with lyrifissures i π and i α. Setation including 3 s, 5 d (leaf-like), and approximately 17 ch, 9 sm, and 9 v, setae. Sexual differentiation in tibia and tarsus indistinct. Pretarsus in shape of a pair of well developed sessile claws. Immatures ( Figs. 32–34View FIGURES 32 – 34). Trochanter: PN, 0 setae; DN, 0–1 (2 in one specimen); TN, 2–4. Femur: PN, 3–4 r and  2 p setae; DN, 3–4 r plus  2–4 p; TN, 4–9 r plus  6 p. Genu: PN, 5–6 r plus  1 p; DN, 7–8 r plus  1–2 p; TN, 12–20 r plus  2– 4 p. Tibia: PN, 15–16; DN, 23–26; TN 24 setae. Tarsus of PN, DN and TN with, respectively, 2, 3, and 4 d setae. Number of tarsal ch, sm, and v setae not scored for immatures.

Idiosoma. Anterior dorsal shield of adults with 94–174 (N= 4) papilliform setae, and two pairs of eyes. Lyrifissures absent. Rostrum rounded. PN, DN and TN with, respectively, 22–27, 45–56, and 90–108 anterior dorsal shield setae. Remaining idiosoma with lyrifissures arranged in more or less transverse rows. Setation in PN limited to 1 dorsal and 2 ventral seta on preanal segment; subsequent instars all with more than 200 papilliform setae. Setae predominantly mid-dorsal and mid-ventral. Anal valves each with 14–23 papilliform setae in adults; PN, DN and TN with, respectively, 2, 5, and 11–17 setae on each valve.

Sternitogenital region ( Figs. 35–36View FIGURES 35 – 36). Sternal verrucae in adults with 1 long, tapering, and 2–3 shorter setae each. Remaining sternal area with 2 pairs of long tapering and 4–9 pairs of papilliform setae, and 3 pairs of lyrifissures (two pairs very large, the third smaller; all different in shape and size from “standard” opisthosomal lyrifissures). PN, DN and TN with, respectively, 0, 1, and 2–3 shorter setae on sternal verrucae, and 0, 1–4, and 6–8 pairs of papilliform setae in remaining sternal area. Pregenital capsules of adults with 1 long tapering and 3–6 papilliform setae each (0, 2–3, and 3–4 in, respectively, PN, DN and TN). Pregenital and genital areas in male with, respectively, 3–6 papilliform and 11–13 ribbed tapering setae. Pregenital area in female with 3–9 ribbed, tapering setae. Condition of genital area less clear. This area appears to have 12 (6– 24) smooth, tapering setae, a unique condition for Salfacarus  , but the area is distorted in the few available specimens, and the zone with smooth setae may in fact be further posterior. In that case the genital area might be without setae (as in all other Salfacarus  ). Still, the presence of smooth tapering setae (in the genital area or in the postgenital ventral area) is highly unusual. Numbers for PN, DN, and TN, respectively, 0 and 0, 0 and 1–3, and 0–2 and 5–8. Ovipositor ( Fig. 27View FIGURES 26 – 27). Without long terminal setae, or very small structures on the ovipositor (setae, gland ducts), but with a pair of large trachea –like structures near base.

Legs. Tarsus I without distinct acrotarsus but with a basitarsus in all instars. Broad sensillum with “crownlike” tip ( Fig. 1SView FIGURE 1 in Vázquez and Klompen (2002)) in main sensillar field. Pretarsi with well developed sessile claws; without setae. Tarsi II each with a thick but not bifurcate dorsal seta and a smooth sensillum resembling a solenidion. Acrotarsus of legs IV present in DN, of legs II –III delayed until TN. Trochanters of legs III –IV divided in most DNs and all TNs. Pretarsi II –IV each with two pairs of setae and a pair of claws.

Collection information. Multiple numbers refer to multiple slides representing a single, dissected. individual. Holotype female ( OSAL 092010 –11View Materials), MADAGASCAR: Toliara, Ranobe , 30 m, 23°02’03”S 43°36’43”E, coll. Frontier Project, 25–28 Apr 2003, ex spiny forest/thicket, litter, mold, rotten wood (EH11, MGF064View Materials)GoogleMaps  . Paratypes: same data as holotype: M ( OSAL 092008 –09)GoogleMaps  ; same locality and collector, 5–9 Feb 2003, (EH11, MGF056View Materials): TN ( OSAL007262–63View Materials), TN ( OSAL007265–7266View Materials), F ( OSAL007267–69View Materials), M ( OSAL007276–77View Materials)GoogleMaps  ; same locality and collector, 17–21 Feb 2003 (EH11, MGF061View Materials): TN ( OSAL007264View Materials)GoogleMaps  ; same locality and collector, 25 Apr 2003: PN ( OSAL007287View Materials), PN ( OSAL007288View Materials), PN ( OSAL007289View Materials), PN ( OSAL007290View Materials), PN ( OSAL007291View Materials), PN ( OSAL007292View Materials), PN ( OSAL007293View Materials), PN ( OSAL007296View Materials), PN ( OSAL007297View Materials), DN ( OSAL007294View Materials), DN ( OSAL007298View Materials), DN ( OSAL007299View Materials), DN ( OSAL007300View Materials), DN ( OSAL007301–02View Materials), DN ( OSAL007304–05View Materials), DN ( OSAL007306View Materials), DN ( OSAL007307View Materials), DN ( OSAL007308View Materials), DN ( OSAL007309View Materials), DN ( OSAL007310View Materials), DN ( OSAL007311View Materials), DN ( OSAL007312View Materials), DN ( OSAL007313View Materials), DN ( OSAL007014View Materials), TN ( OSAL007303View Materials), TN ( OSAL007314–15View Materials), TN ( OSAL007295View Materials), TN ( OSAL007316–17View Materials), TN ( OSAL007318–19View Materials), TN ( OSAL007254–55View Materials), TN ( OSAL007256View Materials), TN ( OSAL007257View Materials), TN ( OSAL007258–59View Materials), TN ( OSAL007260–61View Materials), M ( OSAL007270–71View Materials), M ( OSAL007272–73View Materials), M ( OSAL007274–75View Materials)GoogleMaps  .

Deposition of types. Holotype female at CAS ( CAS 18503View Materials) (2 slides OSAL 092010 –11). Paratypes at CAS, OSAL, UQRoo.

Etymology. The specific name is derived from the collecting locality, the town of Ranobe.


Ohio State University Acarology Laboratory


California Academy of Sciences