Amblyseius constrictus, Argolo & de Moraes & Oliveira, 2015

Argolo, Poliane Sá, de Moraes, Gilberto J. & Oliveira, Anibal R., 2015, A new species of Amblyseius (Acari: Phytoseiidae) in the state of Bahia, Brazil, Florida Entomologist 98 (2), pp. 749-751 : 749-751

Amblyseius constrictus sp. nov. ( Figs. 1–5 ).

DIAGNOSIS

The new species is characterized by having the dorsal shield smooth; all dorsal, ventral and leg setae smooth and sharp-tipped; sternal shield mostly smooth, with few lateral striae; ventrianal shield vase shaped, mostly smooth, with a profound constriction immediately behind JV1; calyx tubular, slightly constricted near basis; atrium undifferentiated.

ETYMOLOGY

The epithet constrictus refers to the profound constriction of the ventrianal shield immediately behind JV1.

DESCRIPTION

Female (7 Specimens Measured)

Dorsum ( Fig. 1 )—Dorsal shield smooth; with 14 pairs of lyrifissures and eight pairs of pores; setal pattern 10A:9B; 352 (326–366,

1 Universidade Estadual de Santa Cruz - UESC, Rodovia Jorge Amado, km 16, 45662-900, Ilhéus, BA, Brazil

2 Departamento de Entomologia e Acarologia, Universidade de São Paulo, 13418-900, Piracicaba, SP, Brazil

336) long and 282 (271–305, 274) wide; setal lengths: j1 31 (30–34, 31), j3 39 (37–41, 41), j4 7 (7–8, 7), j5 7 (6–8, 8), j6 8 (6–8, 8), J2 9 (8–10, 10), J5 7 (6–8, 7), z2 17 (15–18, 15), z4 12 (11–13, 11), z5 7 (7–8, 7), Z1 9 (7–11, 11), Z4 112 (107–116, 113), Z5 223 (214–229, 229), s4 89 (85–92, 92), S2 11 (10–12, 12), S4 10 (9–11, 11), S5 9 (8–11, 8), r3 13 (12–15, 15), R1 10 (8–11, 10). All setae smooth and pointed. Peritreme—Extending beyond level of j1. Venter ( Fig. 2 )—Sternal shield mostly smooth, with few lateral striae, 3 pairs of setae and 2 pairs of lyrifissures; distances between setae St1– St3 63 (61–64, 64), St2–St2 75 (72–76, 73). Genital shield smooth; distance between St5–St5 73 (69–76, 69). Ventrianal shield vase shaped, mostly smooth, with a profound constriction immediately behind JV1, 113 (98–119, 98) long, 68 (64–76, 76) wide at level of ZV2, and 79 (76–81, 76) wide at anus level, with 3 pairs of pre-anal setae (JV1, JV2 and ZV2) and a pair of round pores posteromesad of JV2; setae JV4, JV5, ZV1, and ZV3 on unsclerotised cuticle. Ventral setae smooth and pointed. Two pairs of metapodal plates. Chelicera ( Fig. 3 )—Fixed digit 31 (30–32, 31) long, with 14 (13–15, 15) teeth; movable digit 38 (36–40, 40) long, with 3–4, 3 teeth. Spermatheca ( Fig. 4 )—Calyx tubular, 16 (14–18, 18) long, slightly constricted near region of fusion with major duct; atrium undifferentiated. Leg ma- crosetae ( Fig. 5 )—Sge I 39 (37–43, 40) Sge II 37 (37– 40, 40), Sge III 48 (43–55, 43), Sti III 34 (34–37, 34), Sge IV 97 (92–101, 98), Sti IV 61 (58–64, 64), St IV 75 (70–79, 70), all pointed. Chaetotaxy: genu II 1–2/1, 2/0–1; genu III 1–2/1, 2/0–1.

Male

Unknown.

TYPE MATERIAL

Seven slides: HOLOTYPE 1 female BRAZIL: Bahia, Ilhéus, Fazenda Terra Nova (14°43’52”S, 39°09’16”W), 25-V-2007, from H. psittacorum x H. spathocircinata cv. ‘Alan Carle’, A. R. Oliveira (deposited at Universidade Estadual de Santa Cruz, UESC, Ilhéus, Bahia). PARA- TYPES 3 females BRAZIL: Bahia, Ilhéus, Campus of UESC (14°47’49”S, 39°10’23”W), 1-VIII-2014, from C. trichotoma Arrabida ex Steudel, A.N. Carvalho ( UESC). 1 female BRAZIL: Bahia, Ilhéus, Campus of UESC (14°47’49”S, 39°10’23”W), 14-I-2008, from A. purpurata cv. ‘Red Ginger’, A. R. Oliveira (deposited at Escola Superior de Agricultura “Luiz de Queiroz”, ESALQ, Universidade de São Paulo, Piracicaba, São Paulo, Brazil). 2 females BRAZIL: Bahia, ValenÇa, Fazenda Barra (13°21’05”S, 39°19’57”W), 15-VIII-2007, from T. grandiflorum, A.R. Oliveira ( ESALQ).

REMARKS

This new species is similar to Amblyseius coffeae De Leon (1961) , Amblyseius fernandezi Chant & Baker (1965) , and Amblyseius operculatus De Leon (1967) , in relation to the general measurements and general shape of spermatheca, but it differs from them by having a profound constriction of the ventrianal shield immediately behind JV1, and by having the spermathecal calyx slightly constricted near region of fusion with the major duct. In addition, it differs from A. coffeae by having preanal pores rounded (ellipsoidal in A. coffeae ), from A. fernandezi by having z2 longer (in the latter 9–12 according to Denmark & Muma [1989]), and from A. operculatus by having spermathecal calyx longer (in the latter 10 according to De Leon [1967], 8 according to Denmark & Muma [1989], and 8–12 according to Gondim Jr. & Moraes [2001]). The following key can be used to separate those species:

1. — Spermatheca with atrium globular........................................................................... A. fernandezi

1’. — Spermatheca with atrium undifferentiated............................................................................... 2

2. — Preanal pores ellipsoidal...................................................................................... A. coffeae

2’. — Preanal pores rounded............................................................................................... 3

3. — Ventrianal shield with a profound constriction immediately behind JV1; calix of spermatheca with a slight constriction near region of fusion with major duct................................................................................. A. constrictus sp. nov.

3’. — Ventrianal shield without constriction behind JV1; calix of spermatheca with constriction near region of fusion with major duct.............................................................................................................. A. operculatus

Figures

Figs.1-5. Female ofAmblyseius constrictus sp. nov.1. Dorsal surface of idiosoma;2. ventral surface of idiosoma;3. chelicera;4. variations of calyx of spermatheca; 5. genu, tibia, and basitarsus of leg IV.