Amblydromalus insolitus Nuvoloni & Lofego, n. sp

Autor: Nuvoloni, Felipe Micali, Lofego, Antonio Carlos, Castro, Elizeu Barbosa, Feres, Reinaldo José Fazzio
Rok vydání: 2015
Předmět:
DOI: 10.5281/zenodo.3499913
Popis: Amblydromalus insolitus Nuvoloni & Lofego n. sp. (Figs 1���7) Diagnosis. This new species is close to others in the limonicus species group, due to the ratio between the length of Z 4 and the distance between their bases (Fig. 1), although this species is remarkably different from all Amblydromalus spp. due to the dorsal shield being covered mainly by roundish ornamentation, with anterolateral striae. The ornamentation is quite distinct in the central region, becoming more scattered posteriad of J 2, and toward the shield borders. Specimens examined. Holotype female and one paratype female collected from H. brasiliensis, clone FDR 5788, from Igrapi��na, Bahia, Brazil, (13 �� 48 'S, 39 �� 10 'W) 8 August 2012, E.B. Castro coll.; five female and two male paratypes collected from H. brasiliensis, clone PMB 0 1, 8 August 2012, E.B. Castro coll. All specimens are deposited at DZSJRP. Etymology. The specific name insolitus refers to the unusual pattern of ornamentation on the dorsal shield compared with other Amblydromalus species. Description. Female (n= 7) (Figs 1���5). Dorsum. Dorsal shield covered mainly by roundish ornamentation, with a few anterolateral striae to the level of s 4, 300 [304] (295���315) long and 175 [186] (175���192) wide at level of s 4; five pairs of pores and seven pairs of lyrifissures visible. Setae j 1 20 [20] (17���20), j 3 32 [30] (30���32), j 4 6 [6] (5���7), j 5 5 [6] (5���7), j 6 9 [9] (7���10), J 2 12 [11] (9���12), J 5 10 [8] (6���10), z 2 10 [9] (8���10), z 4 10 [8] (7���10), z 5 6 [6] (6���7), Z 1 12 [11] (10���12), Z 4 10 [10] (10���11), Z 5 60 [61] (60���65), s 4 38 [36] (32���41), S 2 14 [13] (11���15), S 4 10 [11] (10���12), S 5 9 [10] (9���10), r 3 15 [13] (12���15), R 1 10 [9] (8���10). Setae r 3 and R 1 inserted in unsclerotised cuticle. All setae smooth and pointed, except Z 5 serrate. Venter. Sternal shield smooth; with three pairs of setae and two pairs of lyrifissures. Distances between st 1 -st 3 60 [59] (57���60), st 2 -st 2 72 [67] (65���72). Genital shield smooth, distance between st 5 -st 5 70 [69] (65���72). Ventrianal shield vase shaped, smooth, 100 [100] (85���107) long, 48 [52] (48���55) wide at level of ZV 2, and 45 [51] (45���55) wide at median level of anus, with three pairs of pre-anal setae (JV 1, JV 2, ZV 2) and a pair of pores in a transverse line with JV 2. Opisthogastric cuticle with one pair of metapodal plates. Peritremes extending almost to j 1. Chelicera. Fixed digit 32 [30] (27���32) long, with 11 teeth; movable digit 30 [27] (25���30) long, with four teeth. Pilus dentilis not visible. Spermatheca. Calyx saccular, 26 [24] (20���26) long, atrium distinct, blunt. Legs. Macrosetae present on all legs: Sge I 35 [31] (20���35), Sge II 30 [31] (30���35), Sge III 35 [35] (32���40), Sti III 28 [28] (25���30), Sge IV 60 [60] (50���67), Sti IV 35 [40] (35���44) and St IV 65 [70] (65���75). All macrosetae pointed. Chaetotaxy of genu II 2 2 /0 2 /0 1; genu III 1 2 / 2 2 /0 1. Male. (n= 2) (Figs 6���7). Dorsum. Dorsal shield pattern similar to female, 232���237 long and 165���175 wide. Setae j 1 15, j 3 30���32, j 4 6��� 7, j 5 7, j 6 7���10, J 2 10, J 5 6���8, z 2 9���10, z 4 9, z 5 6, Z 1 10, Z 4 7���10, Z 5 45���48, s 4 30, S 2 10, S 4 10, S 5 8, r 3 9���12, R 1 8. All dorsal setae smooth, s 4 and Z 5 blunt-tipped as in female. Venter. Sternogenital shield smooth. Ventrianal shield subtriangular (Fig. 7), weakly striated, 95���102 long, 120���130 wide at anterior corners, 70 wide at anus level, with three pairs of pre-anal setae (Jv 1, Jv 2 and Zv 2), two pairs of small circular pores, and one pair of large crescent-shaped pores. Peritreme reaching beyond level of j 3. Chelicera (Fig. 6). Movable digit 20 long, fixed digit 23 long; pilus dentilis not visible. Spermatodactyl elongated, 23 long, toe and heel conspicuous. Legs. Macrosetae with pointed tips present on all legs: Sge I 25���28 with, Sge II 25���30, Sge III 25, Sti III 22��� 25, Sge IV 40 ���42, Sti IV 30, and St IV 62. Chaetotaxy as in female. Remarks. In contrast to other species of Amblydromalus, the dorsal shield of this new species is distinct reticulated, resembling many Typhlodromalus species as reported by Chant & McMurtry (2005 a). However this species fits the genus Ambydromalus by having the ratio of setae s 4:Z 1> 3.0: 1:0, j 3, s 4 and Z 5 longer than other dorsal setae, dorsal setae smooth, Z 4 not longer than distance to S 4, and absence of an indentation of the dorsal shield at the level of seta S 5 (such as in Typhlodromalus). Furthermore, the length and proportions of setae seem more conservative in phytoseiid groups than dorsal reticulations, and it has been a useful feature to separate groups (Chant & McMurtry, 2007). According to Chant & McMurtry (2005) the setal ratio s 4:Z 1> 3.0: 1:0 is a diagnostic feature for the classification of phytoseiids in the subtribe Thyphlodromalina, and consequently as Amblydromalus. Considering these facts, we believe that the new species fits better in Amblydromalus than Typhlodromalus.
Published as part of Nuvoloni, Felipe Micali, Lofego, Antonio Carlos, Castro, Elizeu Barbosa & Feres, Reinaldo Jos�� Fazzio, 2015, Phytoseiidae (Acari: Mesostigmata) from rubber tree crops in the State of Bahia, Brazil, with description of two new species, pp. 260-274 in Zootaxa 3964 (2) on pages 262-264, DOI: 10.11646/zootaxa.3964.2.6, http://zenodo.org/record/239742
{"references":["Chant, D. A. & McMurtry, J. A. (2005 a) A review of the subfamily Amblyseiinae Muma (Acari: Phytoseiidae): Part VI. The tribe Euseiini n. tribe, subtribes Typhlodromalina n. subtribe, Euseiina n. subtribe, and Ricoseiina n. subtribe. International Journal of Acarology, 31, 187 - 224. http: // dx. doi. org / 10.1080 / 01647950508684424","Chant, D. A. & McMurtry, A. J. (2007) Illustrated Keys and Diagnoses for the Genera and Subgenera of the Phytoseiidae of the World (Acari: Mesostigmata). Indira Publishing House, West Bloomfield, 220 pp."]}
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