Juxtacolopodacus phalakros, Flechtmann, Carlos H. W. & De, Dalva L., 2010

Flechtmann, Carlos H. W. & De, Dalva L., 2010, New taxa in the Eriophyidae (Acari, Prostigmata) from forest trees in southern Brazil, Zootaxa 2337, pp. 18-30 : 19-20

Juxtacolopodacus phalakros n. sp.

( Fig. 1 )

Female (n = 5). Body spindleform, elongate, 143(142–155), 62(54–62) wide. Gnathosoma projecting down, apical seta (d) not evident; basal seta (ep) 4(4); chelicerae 11(11–13). Prodorsal shield broad, 48(46–50), 60(53–60) wide, apparently smooth and with a hemispheric elevation or gibbosity, flattened out under the weight of the coverslip; the inverted U-shaped line could be the outline of this convexity. Scapular seta (sc) 6(5–6), on far lateral shield margin, 55(49–55) apart. Shield with a pronounced anterior lobe. Legs with femoral seta (bv) missing. Leg I 19 (18–20); femur 9(8–9), femoral seta (bv) absent; genu 3(3), genual seta (l”) 21(21–24); tibio-tarsus 5(5–6), dorsal seta (ft’) 12(12–13), lateral seta (ft”) 14(14–16), unguinal seta (u’) geniculate, 4(4), solenidion displaced laterally, 5(4–5), blunt, empodium 4(4), 6-rayed. Leg II 18 (15–18), femur 9(8–9), bv 12(11–14); genu 3(3), l” 8(6–9); tibio-tarsus 4(4), ft’ 5(6), ft” 16(15–17), u’ geniculate, 3(3), solenidion 9(9–10), in normal dorsal position, empodium 4(4), 6-rayed. Coxae I partially granulated, well separated; coxae II smooth. Coxal seta I (1b) 4(3–5), 12(10–12) apart; coxal seta II (1a) 8(6–8), 9(9) apart; coxal seta III (2a) 13(12–22), 20(20–24) apart. Coxisternal region smooth. Genitalia 21(19–21) wide, 15(11–15) long; epigynum basally granulated, distally with one curved transverse line parallel to rear border and a few broken equally curved and transverse lines; genital seta (3a) 8(7–11). Opisthosoma with a large dorsomedian trough with a median ridge extending from shield rear margin to dorsad of second ventral seta (e), and two strong lateral ridges extending over entire opisthosomal length. With 27(27–28) dorsal annuli, smooth; and 45(43–45) ventral annuli, microtuberculate as represented in fig. 1V. Lateral seta (c2) 11(11–16), on annulus 3(3–4). Ventral seta I (d) 45(36–48), 25(24–26) apart, on annulus 13(11–13); ventral seta II (e) 12(11–13), 12(11–12) apart, on annulus 23(22–24); ventral seta III (f) 12(11–13), 18(14–18) apart, on annulus 39(37–39) or 7(7)th from rear. Caudal seta (h2) 25(23–27); accessory seta (h1) minute.

Male. Not seen.

Type material. Female holotype and 4 female paratypes, from Mollinedia clavigera Tul. (Monimiaceae) , Jardim Botânico, Curitiba, Paraná, Brazil, 25º26’S and 49º14’W, 0 2 July 2008, collected by Dalva L. de Queiroz, on 3 microscopic preparations in the collection of Departamento de Entomologia e Acarologia, ESALQ – Universidade de São Paulo, Piracicaba, São Paulo, Brazil.

Relation to host. Leaf vagrants; no apparent damage.

Etymology. The specific designation phalakros comes from Greek, meaning bald headed, smooth and refers to the smooth prodorsal shield.

Figures

FIGURE 1. Juxtacolopodacus phalakros n. gen., n. sp., female. D—dorsal aspect; E—empodium; L 1 — leg I; L 2 — leg II; V—ventral aspect.