Amblyseius atlanticus, Moraes, Gilberto José De, Barbosa, Marina Ferraz De Camargo & Castro, Tatiane Marie Martins Gomes De, 2013

Moraes, Gilberto José De, Barbosa, Marina Ferraz De Camargo & Castro, Tatiane Marie Martins Gomes De, 2013, Phytoseiidae (Acari: Mesostigmata) from natural ecosystems in the State of São Paulo, Brazil, Zootaxa 3700 (3), pp. 301-347 : 304-306

Amblyseius atlanticus n. sp.

( Figures 4–8 )

Diagnosis. Females with seta Z1; Z5 longer than the distance between their bases; s4 about 16 times as long as Z1; s4 about eight times as long as S2; ventrianal shield vase-shaped; genu of leg I with a macroseta; calyx of spermatheca cup-shaped, atrium small.

Specimens examined. Holotype female and a paratype female from Erythrina speciosa Andr., Pariquera-Açu , State of São Paulo, 9 October 2001, L.V.F. Silva coll.; a paratype female from Trichilia elegans A. Juss , and three paratype females from Emilia sonchifolia Benth., Pariquera-Açu , State of São Paulo, 9 October 2001, L.V.F. Silva coll., deposited at ESALQ-USP. Three paratype females from Emilia sonchifolia Benth., Pariquera-Açu , State of São Paulo, 9 October 2001, L.V.F. Silva coll., deposited at DZSJRP.

Description. Female (n= 10). Figures 4–8 .

Dorsum. Dorsal shield mostly smooth, with scanty anterolateral striae, with 15 pairs of distinguishable lyrifissure and six pairs of pores, 320 (300–350) long and 203 (175–225) wide. Setae j1 27 (26–30), j3 38 (35–43), j4 7 (6–8), j5 5 (5–6), j6 7 (6–9), J2 6 (6–7), J5 5 (4–7), z2 11 (9–13), z4 12 (10–15), z5 5 (5–6), Z1 5 (6–7), Z4 92 (87–95), Z5 112 (107–125), s4 81 (77–88), S2 10 (9–11), S4 8 (7–10), S5 9 (8–10), r3 21 (20–23), R1 12 (10–15). Setae smooth and pointed, except for Z4 and Z5, lightly serrate and pointed.

Venter. Sternal shield smooth, except for the lateral lines at fusion with the endopodal plate, three pairs of setae and two pairs of lyrifissures; distances between St1 - St3 63 (55–65), St2 - St2 84 (80–85). Genital shield smooth; distance between St5 - St5 76 (71–77). Ventrianal shield vase-shaped, mostly smooth, with scanty anterolateral striae, 140 (135–149) long, 87 (85–89) wide at level of ZV2, 83 (77–91) wide at anus level, with three pairs of preanal setae (JV1, JV2 and ZV2); JV4, JV5, ZV1 and ZV3 on unsclerotised cuticle, and a pair of pre-anal pores about in transverse line with JV 2. Ventral setae smooth and pointed. Two pairs of metapodal plates present. Peritreme extending beyond level of j1.

Chelicera. Movable cheliceral digit 30–34 long, with three teeth; fixed cheliceral digit 35–36 long, with 1two teeth and a pilus dentilis.

Spermatheca. Calyx cup-shaped, 7 long; atrium small.

Leg macrosetae. Sge I 30–37, Sge II 40–42, Sge III 47–51, Sge IV 104–119, Sti III 38–44, Sti IV 70–77, St IV 82–85, all pointed. Chaetotaxy: genu II 1–2 /1, 2/0–1; genu III 1–2 /1, 2/0–1. Male. Unknown.

Etymology. The name atlanticus refers to “ Mata Atlantica” (Atlantic Forest), the biome from wich the type specimens were collected.

Remarks. This new species is similar to Amblyseius quadridens Karg & Oomen-Kalsbeek, 1987 and Amblyseius saacharus Wu, 1981 . Amblyseius quadridens differs from this new species by having s4, Z4, Z5, Sge IV and St IV shorter (47, 56, 80, 65 and 75 respectively) and the movable cheliceral digit with four teeth. Amblyseius saacharus differs by having j1, s4, Z4, Z5, and r3 shorter (15–17, 36–40, 53–58, 77–80 and 7 respectively) and spermathecal calyx saccular.

Figures

FIGURES 1 – 8. 1 – 3, Spermathecae of Amblyseius acalyphus with none (1), one (2) and three (3) spermatophores. 4 – 8, Amblyseius atlanticus n. sp. female: 4. Dorsal idiosoma, 5. Ventral idiosoma, 6. Spermatheca, 7. Chelicera, 8. Genu, tibia and tarsus of leg IV.