Euterpia fissa, Navia, Denise & Flechtmann, Carlos H. W., 2005

Navia, Denise & Flechtmann, Carlos H. W., 2005, A new genus and five new species of Eriophyoidea (Prostigmata) associated with palm trees from Brazilian Amazon, Zootaxa 1078, pp. 41-58 : 44-45

Euterpia fissa n. sp. ( Fig. 1 )

FEMALE. (Measurements of holotype and range of 4 paratypes) Body fusiform, 146 (146–173) long, 54 (54–59) wide; colour in life white­yellowish. Gnathosoma projecting downwards, 23 (23–28) long; basal seta (ep) 4 (3–4) long; antapical seta bifurcate, with proximal region 5 (5–7) long and distal longer branch 8 (8–10) long, shorter branch minute. Chelicerae 18 (18–24) long; oral stylets 13 (13–16) long. Prodorsal shield 57 (57–60) long, 50 (50–51) wide, subcircular, sculptured and slightly ornated with granules and sinuous faint lines. Scapular seta (sc) 11 (9–11) long, directed up, slightly backward, on prominent tubercles placed well ahead of posterior shield margin, 21 (21–22) apart, on a shield elevation. Prodorsal shield bend around latero­ventrally, with granules on its ventral extension. Shield design of two trapezoidal cells with rounded corners on 1/3 anterior median shield; two longitudinal lines extending over whole shield, internally to prodorsal tubercles, anteriorly divergent and posteriorly convergent, joined near posterior shield margin forming a triangular extremity; a central depression between these longitudianl lines. Frontal lobe apically rounded, broad­based, thick, extending over gnathosoma, 9 (9–11) long, 24 (20–24) wide. Legs lacking femoral setae (bv) I and II. Legs I 23 (23–28) long; femur 11 (11–13) long, femoral seta (bv) absent; genu 4 long, genual seta (l’) 21 (21–25) long; tibia 2 (2–3) long, tibial seta (l”) 2 (2–3) long; tarsus 4 long, lateral seta (ft”) 19 (19–20) long, dorsal seta (ft’) 14 (14–15) long, unguinal seta (u’) bifurcate 7 (7–8) long, solenidion 10 (10–11) long, blunt; empodium 4 (4–5) long, 3­rayed. Legs II 20 (19–20) long; femur 9 (9–12) long, bv absent; genu 3 long, l” 10 (10–13)­ long; tibia 3 (2–3) long; tarsus 4 long, ft” 16 (16–18) long, ft’ 2 (2–3) long, u’ bifurcate, 5 (5–6) long, solenidion 5 long, blunt; empodium 4 long, 3­rayed. Coxae smooth. Sternal line conspicuous, 12 (12–13) long. Coxal seta I (1b) 9 (7–10) long, 10 apart; coxal seta II (1a) 12 (12–15) long, 4 (4–5) apart; coxal seta III (2a) 28 (25–29) long, 15 (15–16) apart; 7 (7–8) coxigenital semi annuli, smooth. Genitalia 20 (19–20) wide, 12 (12–15) long, smooth; epigynum with two somewhat separated groups of 5 (5–6) transversal curved lines convergent to mid rear region; genital seta (3a) 12 (10–12) long. Opisthosoma with 33 (33–36) dorsal annuli, smooth; ventrally with 33 (33–38) annuli, with microtubercles slightly elongate, restricted to the median ventral area, except on telosome (caudad of line across bases of seta f) where microtubercles are more elongated and occupy whole annuli. Dorsal opisthosoma with a central ridge. Lateral seta (c2) 10 (10–12) long, in line with 23 (24) ventral annulus. Ventral seta I (d) and II (e) absent; ventral seta III (f) lateral, 14 (14–16) long, 14 apart, 16 (16–17) microtubercles apart, on annulus 2930 (29–32). Caudal seta (h2) 30 (30–36) long; accessory seta (h1) absent.

MALE. (Measurements of 3 paratypes) Smaller than female, 140–142 long, 46–55 wide. Gnathosoma 20–25 long; basal seta (ep) 3 long; antapical seta as in female, with proximal region 6 long and distal region 9 long. Chelicerae 14–16 long; oral stylets 14–16 long. Prodorsal shield as in female, 55–58 long, 54 wide. Scapular seta (sc) 8–11 long, on tubercles 24 apart. Frontal lobe 8–10 long, base 21–25 wide. Legs as in female. Leg I 25–26 long; femur 11–12 long, femoral seta (bv) absent; genu 4 long, genual seta (l”) 24 long; tibia 34 long, tibial seta (l’) 3 long; tarsus 4 long, lateral seta (ft”) 17–18 long, dorsal seta (ft’) 14–16 long, unguinal seta (u’) bifurcate, 6–7 long, solenidion 10–11 long; empodium 4–5 long, 3­rayed. Legs II 20 long; femur 10–12 long, bv absent; genu 3 long, l” 10–11 long; tibia 2 long; tarsus 4 long, ft” 13–15 long, ft’ 2–3 long, u’ bifurcate 5–6 long, solenidion 5 long; empodium 4 long, 3­rayed. Coxae as in female. Sternal line 11 long. Coxal seta I (1b) 7–10 long, 10 apart; coxal seta II (1a) 11–13 long, 4 apart; coxal seta III (2a) 21–26 long, 12 apart; 6–8 coxigenital semi annuli, smooth. Genitalia 17 wide, 1112 long, smooth, papillae as figured; genital seta (3a) 79 long. Opisthosoma as in female, with 32–36 dorsal annuli; 32–36 ventral annuli. Lateral seta (c2) 11 long, on line with annulus 0 2. Ventral seta I (d) and II (e) absent; ventral seta III (f) lateral, 13–16 long, 15 apart, 18–19 microtubercles apart, on annulus 26–31. Caudal seta (h2) 31–36 long; accessory seta (h1) absent.

Type material. Female holotype, 4 female and 3 male paratypes, from Euterpe precatoria Mart. (Arecaceae) , Manaus, Amazonas, Brazil, 3º04’S 59º55’W, 28 September 2003, collected by D. Navia and A. M. Tavares, on 3 microscopic preparations, in the collection of Laboratório de Quarentena Vegetal, Embrapa Recursos Genéticos e Biotecnologia, Brasilia, DF, Brazil and paratypes in the collection of Departamento de Entomologia, Fitopatologia e Zoologia Agrícola, Universidade de São Paulo, ESALQ, Piracicaba, São Paulo, Brazil.

Relation to host. Mites are vagrants on inner surface of leaves, along midribs, causing no apparent damage.

Etymology. The specific designation fissa is derived from fissus, a, Latin, split, and refers to the bifurcate unguinal seta (u ´) on leg tarsus I and II.

Figures

FIGURE 1. Euterpia fissa n. gen n. sp. D. Dorsal habitus of female. V. Ventral habitus of female. CGM. Coxigenital region of male. L 1. Leg I. L 2. Leg II. E. Empodium. ANT. Antapical seta (d).