Dichopelmus ibapitanga Reis & Navia, 2010

Reis, Aleuny C., Gondim, Manoel G. C., Návia, Denise & Flechtmann, Carlos H. W., 2010, Eriophyoid mites (Acari: Prostigmata: Eriophyoidea) from fruit trees in Northeastern Brazil — a new genus, three new species and a redescription, Zootaxa 2694, pp. 43-56 : 50-53

Dichopelmus ibapitanga Reis & Navia n. sp.

Eriophyidae , Phyllocoptinae , Acaricalini ( Figs. 5 & 6 )

Diagnosis. Dichopelmus ibapitanga n. sp. is distinctive in the smooth prodorsal shield and having the presence of elongated microtubercles in the median region of the dorsal annuli. It is similar to Dichopelmus notus Keifer, 1959 and Dichopelmus flechtmanni Huang, 2001 in possessing short scapular seta (sc) (reaching only the first dorsal annulus in D. notus and the second in D. flechtmanni ) and in the 4-rayed divided empodium. However, the new species differs from the mentioned species by having a completely smooth prodorsal shield (almost smooth in D. notus but presenting longitudinal furrows, and rough in D. flechtmanni ); elongated microtubercles in the median region of the dorsal annuli (absent in D. notus ; sparse, not elongated and not restricted to the median region of D. flechtmanni ); and in the coverflap ornamentation: basal half area smooth and the distal half with a row of longitudinal lines (in D. notus , the epigynum longitudinal lines extend over the distal half occupying almost the entire coverflap and in D. flechtmanni the epigynum presents two rows of longitudinal lines).

FEMALE (n=10). Body fusiform, 172 (156–189), 74 (69–79) wide; colour in life, light yellowish. Gnathosoma downcurved, 24 (21–24); basal seta (ep) 2 (2–3); apical seta (d) 8 (8–9), simple; chelicerae 17 (15–18). Prodorsal shield subrectangular 53 (48–54), 72 (60–74) wide. Frontal lobe broadly rounded, broad basally, 9 (9–10), 23 (23–27) wide. Scapular setae (sc) 5 (4–5), on tubercles near the rear shield margin and directed backwards, 37 (34–39) apart. Legs with all segments; all usual setae present. Leg I 31 (31–32); femur 9 (8–10), femoral seta (bv) 10 (8–10); genu 5 (4–5), genual seta (l ”) 22 (20–22); tibia 8 (8–9), tibial seta (l ’) 4 (4–5); tarsus 7 (6–7), lateral seta (ft ”) 20 (19–20), dorsal seta (ft ’) 17 (17–18), unguinal seta (u’) 3 (3–4), solenidion (ω) 5 (5–6) strongly knobbed, empodium divided 4–5, 4–rayed. Leg II 30 (30–33); femur 9 (8–9), bv 9 (9–11); genu 5 (4–5), l” 5 (5); tibia 6 (6); tarsus 6 (5–6), ft ” 17 (16–18), ft ’ 5 (5), u’ 3 (3–4), ω 5 (5) strongly knobbed; empodium as in leg I, 4-rayed. Coxae I and II without granules. Sternal line 6 (6–7). Coxal seta I (1b) 7 (6–7), 14 (13–14) apart; coxal seta II (1a) 16 (16–17), 9 (9–10) apart; coxal seta III (2a) 28 (28– 33), 27 (26–30) apart; 13 (12–13) coxigenital annuli, smooth. Genitalia 23 (21–23), 18 (18–22) wide, coverflap with proximal area smooth and distal half area with 12 (11–13) longitudinal lines; genital seta (3a) 11 (11). Opisthosoma 27 (27–31) dorsal annuli; a median and two lateral slight ridges; microtubercles elongated, restricted to the median region, more numerous in the first annuli and gradually decreasing in number until the 1/3 posterior where only a single elongated microtubercle is present; 62 (55–66) ventral annuli. Lateral seta (c2) 19 (19–23), on annulus 4 (3–4); ventral seta I (d) 56 (56–60), on annulus 18 (17–19), 23 (20–24) apart, 16 (11–17) microtubercles apart; ventral seta II (e) 11 (11–12), on annulus 38 (36–38), 11 (11–12) apart, 8 (8–11) microtubercles apart; ventral seta III (f) 15 (14–17), on annulus 56 (50–61), 20 (20– 22) apart, 24 (20–24) microtubercles apart. Caudal seta (h2) 50 (50–58); accessory seta (h1) absent.

MALE (n=5). Smaller than female, 142–167, 60–67 wide. Gnathosoma 19–22; basal seta (ep) 2–3; apical seta (d) 7–8; chelicerae 14–16. Prodorsal shield as in female, 43–51, 54–62 wide. Scapular setae (sc) 5 on tubercles, 32–33 apart. Frontal lobe 8–10, 21–24 wide. Legs as in female. Leg I 29–33; femur 8–9, femoral seta (bv) 8–9; genu 5, genual seta (l ”) 20–22; tibia 8–9, tibial seta (l ’) 4; tarsus 5–6, lateral seta (ft ”) 17–19, dorsal seta (ft ’) 15–16, unguinal seta (u’) 3–4, solenidion (ω) 5 strongly knobbed; empodium divided 4–5, 4- rayed. Leg II 28–32; femur 8–9, bv 8–10; genu 4–5, l ” 4–5; tibia 5–7; tarsus 5–6, ft ” 15–17, ft ’ 5, u’ 3–4, ω 5– 6 strongly knobbed; empodium divided 4–5, 4-rayed. Coxae as in female. Sternal line 6. Coxal seta I (1b) 5– 6, 12–13 apart; coxal seta II (1a) 15, 8–9 apart; coxal seta III (2a) 26–30, 20–23 apart; 13–15 coxigenital annuli, smooth. Genitalia 10–11, 15–16 wide, posterior region without granules, eugenital setae as figured; genual seta (3a) 9–10. Opisthosoma as in female, 28–29 dorsal annuli; 48–56 ventral annuli. Lateral seta (c2) 16–17, on annulus 2–3; ventral seta I (d) 52–56, on annulus 12–14, 20–24 apart, 14–16 microtubercles apart; ventral seta II (e) 11–12, on annulus 26–31, 10–13 apart, 6–10 microtubercles apart; ventral seta III (f) 13–15, on annulus 43–51, 19–22 apart, 20–23 microtubercles apart. Caudal seta (h2) 50; accessory seta (h1) absent.

Type material. Female holotype, 23 female and 16 male paratypes from Eugenia uniflora L ( Myrtaceae ), Recife, Pernambuco, Brazil. 08° 01’ 07” S, 34° 56’ 41” W, 22 August 2008, coll. A. C. Reis, on 7 microscope slides. Holotype and paratypes (23 specimes, 16 females and 7 males, on 5 microscope) deposited in the collection of the Laboratório de Acarologia, Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil. Paratypes (16 specimens, 7 females and 9 males, on 2 microscope slides) also deposited in the collection of the Laboratório de Quarentena Vegetal, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil.

Relation to host. Vagrant on the lower leaf surface.

Etymology. The specific name “ibapitanga ” comes from the Tupi Guarani indigenous word "ibá-pitanga", that means a "fruit of red skin", referring to the common name of the host plant.

Figures

FIGURE 5. Dichopelmus ibapitanga n. sp. – CGM. Coxigenital region, male; D. dorsal habitus, female; em. empodium, leg I, female; LM. lateral habitus, female; LO. lateral opisthosoma view of anterior section of mite; L 1. leg I, female; L 2. leg II, female; V. ventral habitus, female.

FIGURE 6. Dichopelmus ibapitanga n. sp. A. dorsal habitus, female, droplets of wax on its body; B. ventral habitus, female; C. lateral habitus, female; D. genitalia, male; E. epigynum; F. prodorsal shield; G. leg I, female; I. leg II, female.