Ornithodoros faccinii n. sp. Barros-Battesti, Landulfo & Luz Diagnosis Larva with elongated dorsal plate, almost rectangular; the anterior and posterior margins rounded with sides parallel. Idiosoma dorsal with 10 pairs of dorsolateral setae and 3 pairs of central dorsal setae. Idiosoma ventral with 7 pairs of setae (3 sternal, 3 circumanal and 1 ventrolateral pairs) plus 1 anal pair. Hypostome long, pointed, dental formula 3/ 3 in the anterior third, then 2/2 posteriorly to the base. Presence of small spurs at the base of hypostome in the lateral position. Trochanter of palpi with spurs in the internal side and ventrally, some of them are bifid. Nymphs of first instar with reduced camerostome. Hood and cheeks absent. First pair of posthypostomal setae (Ph1) arising at level of insertion of article II of palpi and half of hypostome. Second pair of posthypostomal setae (Ph2) very short, not reaching the hypostomal basis and corresponding to 1/4 of length of Ph1. Hypostome notched in the apex, dental formula 4/4 apically (3 rows) then 3/3 (3 rows) and 2/2 (3 rows) until posterior margin of article II. Body with mammillae covering both ventral and dorsal surfaces. Genital primordium present. Capsule of Haller ’ s organ U-shaped. Description Larva (Figures 1, 2 and 3) Idiosoma dorsal: Subcircular (Figures 1A, C, D, 2 A-B), broadest near midlength, length 773.32 ± 24.33 (591.12- 1220.00) [626.74], width 645.01 ± 15.23 (534.40-901.20) [534.40], with 13 pairs of setae. Dorsal chaetotaxy as follows: 10 dorsolateral (DL) pairs, of which 6 pairs dorsal anterolateral (DAL), length DAL1 30.53 ± 0.35 (30.47- 31.26) [30.47], length DAL2 27.24 ± 1.34 (25.87-29.14) [29.14], length DAL3 28.79 ± 0.57 (28.34-29.73) [29.73], length DAL4 32.03 ± 1.53 (31.31-34.86) [32.03], length DAL5 23.00 ± 2.40 (21.10-26.89) [21.10], length DAL6 22.50 ± 6.30 (22.00-35.53) [22.06] (Figure 2A), and 4 pairs dorsal posterolateral (DPL), length DPL1 46.30 ± 1.08 (46.19-48.55) [48.55], length DPL2 43.50 ± 3.34 (41.30- 49.23) [49.23], length DPL3 48.66 ± 3.20 (47.04-54.68) [54.68], length DPL4 50.62 ± 3.30 (48.45-56.33) [56.33]; 3 central (DC) pairs, length DC1 33.14 ± 2.65 (32.26-38.28) [38.28], length DC2 24.21 ± 4.02 (23.60-32.42) [32.42], length DC3 29.64 ± 2.46 (27.58-33.53) [33.53]. Dorsal plate smooth, elongated, almost rectangular, with anterior and posterior margins rounded (Figures 1A, D, 2A), length 196.72 ± 0.82 (180.12 – 201.22) [179.09], width 131.00 ± 0.52 (125.10 – 133.00) [127.24]. Idiosoma ventral: venter with 7 pairs of setae plus 1 anal pair (A). Ventral chaetotaxy (Figures 1C, E, 2B): 3 sternal pairs (ST), length ST1 32.06 ± 2.33 (28.97-34.38) [33.53], length ST2 32.38 ± 3.37 (26.22-35.35) [33.20], length ST3 28.04 ± 2.74 (23.25-30.81) [30.81], 1 pair ventral posterolateral (VPL) and 3 circumanal pairs (CA), length CA1 29.02 ± 0.35 (24.51-34.63) [34.54], length CA2 49.54 ± 0.68 (44.22- 63.54) [63.54] and length CA3 59.73 ± 0.24 (55.73-61.43) [58.54]. Posteromedial seta (PMS) absent in most of the larvae (Figure 1E), but present in the holotype. Capitulum: Ventral base with lateral angles slightly rounded. Total length from apex of palpi to base 286.72 ± 13.22 (275.28-307.25) [307.25], width 191.60 ± 8.17 (189.65- 207.89) [207.89] (Figure 3A). Two pairs of posthypostomal setae: Ph 1 length 6.04 ± 0.11 (5.53-6.63) [5.53], Ph 2 length 10.2 ± 0.28 (9.02-10.23) [9.02]; distance between Ph 1 setae 28.32 ± 0.56 (27.72-34.92) [34.92], and between Ph 2 setae 59.10 ± 0.21 (57.60-66.75) [66.75] (Figure 3B). Hypostome: long, pointed, small spurs at the base of hypostome in the lateral position (Figures 1B, 3B), dental formula 3/ 3 in the anterior third, then 2/2 posteriorly to the base (Figures 1B, 3C, F), length (in 3 specimens only) from apex to Ph 1 setae 194.33 ± 4.80 (188.66-200.50) [194.33], width in medial portion 48.83 ± 4.90 (47.77 – 58.64) [58.64]. Palpi: length 195.47 ± 5.15 (187.92-200.71) [198.84], length of palpal articles I – IV (Trochanter, Femur, Genu, Tibiotarsus), respectively: 39.16 ± 7.50 (32.94-51.70) [43.61], 53.60 ± 0.31 (51.13-57.91) [56.00], 58.99 ± 2.90 (53.83-61.80) [61.80] and 35.71 ± 0.52 (34.23-66.45) [40.60]; number of setae on palpal articles I-IV is 0, 4 (1 V, 3D), 5 (1 V, 4D) and 9 tibiotarsal, respectively (Figures 3A, C, E). There are 11 short spurs in the inner side in each trochanter, some of them are bifid (Figures 3B, D). These spurs can also be observed by optical microscopy using immersion obcective. Legs: Tarsus I (Figures 2C, 3G) length (including claw) 325.47 ± 16.99 (318.08-362.84) [318.08], width 91.35 ± 0.89 (89.94-92.26) [92.26]. Setal abbreviation of Tarsus I – 1 pair apical (A), 1 pair basal (B), 1 seta distomedian (DM), 1 seta posteromedian (PM), 1 pair apicoventral (AV), 1 pair midventral (MV), 1 pair basiventral (BV), 1 pair posterolateral (PL) and 5 setae paracapsular (PC); 5 small setae together with DM seta. Capsule of Haller ’ s organ placed centrally, opening as transverse slit, without reticulations inside, but with at least 6 larger setae and many other smaller setae in the marginal border (Figure 2D).

Published as part of Barros-Battesti, Darci Moraes, Landulfo, Gabriel Alves, Luz, Hermes Ribeiro, Marcili, Arlei, Onofrio, Valeria Castilho & Famadas, Kátia Maria, 2015, Ornithodoros faccinii n. sp. (Acari: Ixodida: Argasidae) parasitizing the frog Thoropa miliaris (Amphibia: Anura: Cycloramphidae) in Brazil, pp. 1-11 in Parasites & Vectors (268) (268) 8 (1) on pages 2-6, DOI: 10.1186/s13071-015-0877-3, http://zenodo.org/record/11552241