Diptilostatus chimarricus Ferla 2017, n. sp.

Figs. 2–4

Diptilostatus Flechtmann, 2003: 7 Genus diagnosis. Body robust, spindle–like and not flattened; prodorsal shield wide without naso; setae sc absent; all coxal and opisthosomal ventral setae present; legs with 6 segments (genu not fused with femur); setae bv absent from both legs; genual setae absent only from leg II; tibial setae lacking; empodium divided.

FEMALE (n=8). Body fusiform, 200 body length, 91 (90–95) wide; salmon color in life. Gnathosoma. Chelicerae 13 (12–14) long; oral stylets 68 (65–72) long; anterior shield lobe absent; pedipalp coxal seta (ep) not seen; dorsal pedipalp genual seta (d) 4 (4–5). Prodorsal shield 36 (34–37) long, 78 (76–82) wide, scapular setae (sc) absent and shield tubercles present. Shield design with median lines, approximate on posterior third. Small lines laterally on anterior first third, narrow frontal lobe. Coxal plates. Coxae smooth; coxae I without indication of a sternal line; coxa I 26 (26–29) with anterolateral setae on coxisternum I (1b) 10 (10–13) and proximal setae on coxisternum I (1a) 13 (13–14). Coxa II 11 (11–13) with proximal setae on coxisternum II (2a) 40 (39–42); coxigenital area with 9 (8–10) annuli, microtuberculate. Legs. Legs with all usual segments and setae. Leg I 50 (48–52), trochanter 8 (8), femur 15 (14–17), basiventral femoral seta (bv) absent; genu 4 (4), antaxial genual seta (l´´) 50 (47–53) on a large tubercle; tibia 5 (4–5), paraxial tibial seta (l´) absent; tarsus 9 (9–10), paraxial fastigial tarsal seta (ft´) 35 (34–37), antaxial fastigial tarsal seta (ft´´) 37 (35–39), paraxial unguinal tarsal seta (u´) 6 (6), tarsal empodium (em) 8 (8–9) divided, 8–rayed at each side, tarsal solenidion (ω) 8 (7–8), knobbed. Leg II 40 (40– 43), trochanter 5 (5), femur 8 (8–9), basiventral femoral seta (bv) absent; genu 4 (4); antaxial genual seta (l") absent; tibia 8 (7–8), paraxial tibial seta (l´) absent; tarsus 6 (6–7), paraxial fastigial tarsal seta (ft´) 8 (8–9), antaxial fastigial tarsal seta (ft´´) 24 (24–27), paraxial unguinal tarsal seta (u´) 5 (4–5); tarsal empodium (em) 8 (7–8) divided, 8-rayed at each side; tarsal solenidion (ω) 6 (6–7) knobbed. Genitalia. Female genitalia 34 (30–36) long, 46 (45–47) wide, cover flap with dots and 12-13 striae in the middle, smooth apically; proximal seta on coxisternum III (3a) 7 (7–8) long. Opisthosoma. Opisthosoma dorsally and ventrally each with 70 (67–72) and 58 (56–60) annuli respectively, dorsal annuli smooth and ventral annuli microtuberculate. Lateral seta (c2) 20 (18– 22); ventral seta I (d) 50 (45–55); ventral seta II (e) 35 (30–40), ventral seta III (f) 20 (16–25); accessory seta (h1) minute and caudal seta (h2) 31 (28–38) tapering abruptly.

Male. Not found.

Material examined. Holotype female and seven female paratypes, from Putinga (28°57´27.69´´S, 52°09´45.84´´O), Rio Grande do Sul, 20 February 2013, on Ilex paraguariensis. Specimens collected by Catiane Dameda and Angélica Bilhar Arce. The material examined was mounted on two slides. The slides are deposited at (ZAUMCN), UNIVATES.

Diagnosis. The new species is distinguished from Dip. nudipalpus, Dip. lofegoi and Dip. mesae by having: the opisthosomal setae e not extending beyond the bases of subsequent setae f (setae e: Dip. chimarricus 30–40 vs others 40–60); setae d and h2 much shorter, being 45–55 and 28–38, respectively (Dip. nudipalpus, Dip. lofegoi and Dip. mesae have setae d 58–80 and h2 57–75); and leg I and II larger and with an 8–rayed empodium (smaller legs and 5–rayed empodium in other species).

Relation to host. Diptilostatus chimarricus n. sp. is a leaf vagrant mite causing no obvious damage to yerba mate plants.

Etymology. The new species is named after a typical drink called “chimarrão” prepared with the leaves and drunk with hot water in Southern Cone countries.