Propilus bactris, Reis, Aleuny C., Gondim, Manoel G. C., Navia, Denise & Flechtmann, Carlos H. W., 2012

Reis, Aleuny C., Gondim, Manoel G. C., Navia, Denise & Flechtmann, Carlos H. W., 2012, Eriophyoid mites (Acari: Prostigmata: Eriophyoidea) on palms (Arecaceae) from the Brazilian Amazon: a new genus and four new species, Zootaxa 3446, pp. 49-59 : 54-56

Propilus bactris n. sp. Reis & Navia

Phytoptidae, Sierraphytoptinae, Mackiellini ( Fig. 3 )

Diagnosis. Propilus bactris n. sp. is the seventh species assigned to this genus. The new species presents a distinctive pair of vertical setae which are drop-shaped, on the anterior margin of the prodorsal shield. It is a Propilus species with smooth dorsal annuli and pointed lateral projections; 6-rayed empodia and a flat and slightly emarginated frontal lobe. The new species is similar to Propilus spinosus Keifer 1975a , Propilus gentyi Keifer 1975a , Propilus syagris Gondim, Flechtmann & Moraes 2000 and Propilus alternatus Navia and Flechtmann 2005 in the presence of pointed and acute lateral projections of the opisthosoma (except Propilus tavaresi Navia & Flechtmann 2005 that presents attenuate lateral projections).

FEMALE (n=10). Body fusiform, 147 (133–156), 72 (64–75) wide; Gnathosoma downcurved, 20 (17–20); basal seta (ep) 3(2–3); antapical seta (d) 10 (10–11) long, not branched; chelicerae 13 (12–14) long. Prodorsal shield 47 (42–47), 71 (62–73) wide, subrectangular. Scapular setae (sc) absent. Frontal lobe flat, subrectangular and slightly emarginated. Vertical external seta (ve) 6 (5–6), expanded basally and tapered at apex (like a candle flame or a rain drop), on prominent tubercles at antero-lateral margin of prodorsal shield, 42 (38–48) apart, directed forwards. Shield design includes a median line extending over ¾ of posterior part of shield, almost reaching posterior shield margin; admedian longitudinal lines slightly divergent extending over posterior half of shield, anteriorly joined by a transversal arched line; transversal sinuous lines running parallel to the anterior part of shield. Legs with all segments present; all setae present except for tibial seta (l') on leg I and II. Leg I 22 (20–22); femur 9 (8–9), femoral seta (bv) 7 (7–8); genu 3 (3), genual seta (l") 18 (16–18); tibia 3 (2–3); tarsus 6 (5–6), lateral seta (ft") 15 (15–18), dorsal seta (ft') 15 (14–15), unguinal seta (u') 2 (2), solenidion (ω) 4 (4), empodium simple 4 (4), 6-rayed. Leg II 21 (20–21); femur 9 (8–9), bv 8 (7–9); genu 3 (3), l" 13 (13–17); tibia 3 (2–3); tarsus 5 (5), ft" 13 (13–15), ft' 5 (5-6), u' 2 (2), ω 4 (4); empodium simple 4 (4), 6-rayed. Coxae smooth. Prosternal apodeme not visible. Coxae I fused, with an apron-like line flap anterior to bases of coxal seta II (1a), extending laterally towards leg I trochanter. Coxigenital region with 2 (2) annuli, smooth. Coxal seta I (1b) 7 (7–9), 16 (15–19) apart; coxal seta II (1a) 10 (9–12), 15 (14–17) apart; coxal seta III (2a) 20 (18–23), 39 (38–42) apart. Genitalia 17 (11–17), 24 (20–24) wide, epigynum smooth; genital seta (3a) 10 (7–10). Opisthosoma 14 (14–15) dorsal annuli, smooth. Pointed lateral projections, alternately shorter and longer, except in first and last caudal annuli; 36 (36–38) ventral annuli, sparsely microtuberculated, microtubercles denser and more elongated on the annuli near the ventral seta III (f). Lateral seta (c2) 13 (13–17), on annulus 1 (1). Ventral seta I (d) 8 (7–9), on annulus 8 (8–9), 27 (27–31) apart, 13 (10–17) microtubercles apart; ventral seta II (e) 8 (7–10), on annulus 21 (20–22), 13 (13–15) apart, 10 (7–11) microtubercles apart; ventral seta III (f) 16 (16–18), on annulus 32 (32–34), 26 (20–26) apart, 28 (20–28) microtubercles apart. Caudal seta (h2) 30 (27–30); accessory seta (h1) absent.

MALE (n=5). Smaller than female, 128–141, 59–70 wide. Gnathosoma 15–20; basal seta (ep) 2; antapical seta (d) 11–12; chelicerae 11–13. Prodorsal shield as in female, 43–50, 57–68 wide. Scapular seta (sc) absent. Vertical external seta (ve) 5–6 long, on prominent tubercles on anterolateral margin of prodorsal shield, 31–37 apart, directed forwards. Legs as in female. Leg I 21–24; femur 9, femoral seta (bv) 6–8; genu 3, genual seta (l") 16–17; tibia 2–3; tarsus 5–6, lateral seta (ft") 14–17, dorsal seta (ft') 13–15, unguinal seta (u') 2, solenidion (ω) 4; empodium simple 4, 6-rayed. Leg II 21–23; femur 8–9, bv 6–7; genu 3, l" 13–16; tibia 3; tarsus 5–6, ft" 11–13, ft' 4–5, u' 2, ω 4; empodium 4, 6-rayed. Coxae as in female. Prosternal apodeme not visible. Coxal seta I (1b) 6–7, 14–16 apart; coxal seta II (1a) 6–10, 12–14 apart; coxal seta III (2a) 17–20, 31–34 apart. Genitalia 12–13, 17–19 wide, eugenital setae as figured; genital seta (3a) 7–10. Opisthosoma as in female, 14 dorsal annuli; 37–38 ventral annuli. Lateral seta (c2) 15–18, on first annulus. Ventral seta I (d) 6–8, on annulus 7–9, 22–23 apart, 10–12 microtubercles apart; ventral seta II (e) 7–9, on annulus 19–21, 11–12 apart, 7–9 microtubercles apart; ventral seta III (f) 17–18, on annulus 33–34, 19–23 apart, 20–28 microtubercles apart. Caudal seta (h2) 32–39; accessory seta (h1) absent.

Type material. Female holotype, 22 female and 9 male paratypes, from Bactris maraja Mart. (Arecaceae) , Campo Experimental Confiança, Cantá, Roraima, Brazil, 02° 35'40.8"N, 60° 29'10.51"W, 0 8 November 2008, collected by Ranyse Barbosa Querino da Silva, on 9 microscope slides. Holotype and paratypes (19 specimens: 13 females and 6 males on 6 microscope slides) deposited in the collection of the Laboratório de Acarologia, Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil. Paratypes (12 specimens: 9 females and 3 male on 3 microscope slides) deposited in the collection of the Laboratório de Quarentena Vegetal, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil.

Relation to host plant. No damage symptoms were seen.

Etymology. The specific designation “ bactris ” refers to Bactris , the host plant genus. It was coined by apposition of the palm genus to the mite genus.

Figures

FIGURE 3. Propilus bactris n. sp. CGM. Coxigenital region, male; D. Dorsal habitus, female; em. Empodium, leg I, female; ve. Vertical seta; L 1. Leg I, female; L 2. Leg II, female; V. Ventral habitus, female.