Scolotosus hartfordi, 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 : 25-26

Scolotosus hartfordi n. sp.

( Figs. 4 , 5 )

Diagnosis. S. hartfordi is the second species in the genus, also from southern Brazil. It differs from the type species in the tripartite anterior shield lobe (undivided in centrolobii ), in the prodorsal shield design: numerous rounded pits present but restricted to area in between admedian lines (all over the shield surface in centrolobii ); coxae smooth (ornamented with curved lines in centrolobii ), and epigynum smooth (with fine longitudinal lines in centrolobii ).

Female (n = 5). Body fusiform, 201(194–218), 61(55–62) wide. Gnathosoma downcurved, apical seta (d) 3(3); chelicerae 12(11–14). Prodorsal shield 34(34–37), 55(50–57) wide, convex in lateral view and hemispherical in dorsal view. Shield with narrow anterior, acute, middle lobe, flanked by two shorter lateral lobes, projecting over rostrum base. Shield with three longitudinal ridges on anterior one third; median line straight, on posterior one third and admedian and submedian lines on posterior two thirds and curved as figured. Numerous rounded pits in the entire area between submedian lines; otherwise shield smooth. Shield tubercles laterally on rear margin, 41(40–46) apart; scapular seta (sc) 9(8–10), directed divergently backwards. Legs: leg I 26 (26–27); femur 9(9–10),femoral seta (bv) 9(8–11); genu 4(4–5), genual seta (l”) 14(13–18); tibia 6(5–6), tibial seta (l’) 4(4–7); tarsus 5(5–6), dorsal seta (ft’) 14(11–14), lateral seta (ft”) 15(13–18), unguinal seta (u’) 3(3–4), solenidion 6(5–6), empodium 4(4–5), 5-rayed. Leg II 25 (25–26), femur 9(8–9), bv 8(7–11); genu 3(3–4), l” 4(4–7); tibia 4(4); tarsus 5(5), ft’ 4(4–6), ft” 13(13–19), u’ 4(3–4), solenidion 6(6–8), empodium 4(4–6), 5-rayed. Coxae smooth; coxal seta I (1b) 4(4), 11(10–12) apart; coxal seta II (1a) 12(12–16), 11(9–12) apart; coxal seta III (2a) 21(21–37), 19(19–23) apart. Sternal line 7(5–9). Coxisternal region with 3(3–5) annuli. Genitalia 18(17–21) wide, 16(13–17) long; epigynum smooth; genital seta (3a) 6(6–11). Opisthosoma with dorsal and ventral annuli about equal; each annulus circled by a ring of small spines slightly ahead of rear margin; ventrally on the caudal five annuli spines become elongate. With a middorsal and lateral ridges or series of lobes, fading caudally. Lateral seta (c2) 10(7–10), on annulus 3(2–3). Ventral seta I (d) 24(24–37), reaching bases of second ventral seta, 32(32–36) apart, on annulus 11(7–11); ventral seta II (e) 7(6–9), 12(12–16) apart, on annulus 16(13–16); ventral seta III (f) 16(16–18), 12(12–16) apart, on annulus 25(22–25) or 5(5–6)th from rear. Total dorsal annuli 26(26); total ventral annuli 30(26–30). Caudal seta (h2) 44(44–62); accessory seta (h1) 3(3).

Male (n = 2) Smaller than female, 155–165, 51 wide. Gnathosoma downcurved, chelicerae 12–13. Prodorsal shield 31, 50 wide; sc 7, 33–34 apart. Legs: leg I 23–24; femur 7–9, bv 9–10; genu 3, l” 10–15; tibia 4–5, l’ 3–4; tarsus 4, ft’ 10–11, ft” 13–17, u’ 3, solenidion 5, empodium 4–5, 5-rayed. Leg II 22–23; femur 7, bv 6–9; genu 3–4, l” 4–6; tibia 3–4; tarsus 4, ft’ 4, ft” 10–15, u’ 3, solenidion 6–7, empodium 4–5, 5– rayed. Coxae: 1b 5, 8 apart; 1a 9–11, 8 apart; 2a 25–26, 17 apart. Sternal line 7–8. Coxisternal area with 6 annuli. Genitalia: 11–13 wide, 8 long; 3a 7–9. Opisthosoma: c2 7–9, on annulus 1–2; d 32, 26 apart, on annulus 6–8; e 8, 11 apart, on annulus 11–13; f 15–16, 11 apart, on annulus 20–23, or 5th from rear. Total dorsal annuli 25–26; total ventral annuli 25–28; h 2 31–33, h1 3.

Type material – female holotype and 37 female and 2 male paratypes, from Centrolobium tomentosum Guill. (Leguminosae) , “araribá-rosa”, Campus Embrapa Florestas, Colombo, Paraná, Brazil, 25º19’S and 49º09’W, 23 April 2008, collected by Dalva L. de Queiroz, on 10 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. We take pleasure in naming this species for Hartford H. Keifer, eminent Eriophyidologist.

Figures

FIGURE 4. Scolotosus hartfordi n. sp., female. D— dorsal aspect; V—ventral aspect.

FIGURE 5. Scolotosus hartfordi n. sp. E—empodium; GM—male genitália; L—lateral aspect of female with enlarged detail of frontal lobe; L 1 — leg I; L 2 — leg II.