Ragusaseius ferraguti Kreiter, 2010

Kreiter, S. & Tixier, M. - S., 2010, A New Genus And Species Of Phytoseiid Mites (Acari: Mesostigmata) From The Brazilian Atlantic Forest, Acarologia 50 (2), pp. 197-205 : 199-202

Ragusaseius ferraguti Kreiter , n. sp.

( Figures 1-3 )

Diagnosis — This species can be distinguished

from other phytoseiid species by the combination of characters given in the description below.

Adult Female ( Figures 1-3 ) (n = 51)

Dorsum ( Figure 1A ) — Dorsal shield reticulated more regularly in the anterior part, 352 (328-400) long and 208 (198-220) wide, with 4 solenostomes (gd1, gd2, gd6 and gd9), 16 pairs of poroids, 19 pairs of dorsal shield setae and 2 pairs of sub-lateral setae, all medium to long and serrated: j1 29 (28-30), j3 50 (48-53), j4 43 (40-45), j5 50 (48-53), j6 60 (55-63), J2 61 (58-63), J3 30 (23-38), J4 26 (23-28), J5 12 (10- 13), z2 53 (48-58), z4 61 (55-68), z5 59 (53-70), Z1 59 (55-63), Z4 55 (50-58), Z5 67 (65-73), s4 72 (68-78), S2 61 (58-65), S4 38 (35-43), S5 33 (30-38), r3 48 (45-53), R1 37 (35-40). Seta J 3 inserted between setae J4 and Z4, slightly closer to the former and not in line with J2 and J4. Setae r3 and R1 inserted on the lateral cuticle. Setae j3, z2, J3 and J4 sometimes absent in some adult females (out of the 52 females observed 7 without J3 on one side of the body, 2 without J3 on one side and J4 on the other side, 1 female without J3 on both sides, 1 female without J4 on both sides, 1 female without both j1 and both j3 and with only one z2) .

Peritreme ( Figure 1A ) — Extending anteriorly almost to the level of j1.

Venter ( Figure 1B ) — Sternal shield smooth, with 3 pairs of setae and 2 pairs of lyrifissures; st4 on a small metasternal shield with one lyrifissure; posterior margin slightly concave. Distances between st1-st1 61 (60-63), st2-st2 71 (68-75), st3-st3 82 (80- 88), st1-st3 67 (63-70), st4-st4 87 (75-95), st5-st5 65 (63-68). Two elongate metapodal shields, primary shield 16 (13-18) long and 2 wide and secondary shield 26 (23-28) long and 4 wide. Ventrianal shield reticulated, variously shaped, but usually vase-shaped ( Fig. 2A a-h); 99 (90-103) long, 66 (58-70) wide at level of anterior corners and 66 (60- 70) wide at level of anus; with only 1 pair of preanal setae, JV2 and occasionally ZV2 are the only pairs of setae inserted on the ventrianal shield (in addition to circumanal setae), one pair of oblong preanal solenostome gv3 posteromesad to JV2. Membrane surrounding ventrianal shield with 6 pairs of setae (ZV1, ZV2, ZV3, JV1, JV4, JV5) and 3 pairs of pores; JV5 47 (43-53) long, serrated.

Legs ( Figure 2B ) — Leg IV with three slightly knobbed macrosetae: Sge IV 26 (23-28), Sti IV 25 (20-28), St IV 40 (38-43). No macrosetae on the other legs. Chaetotactic formula of genu II: 2-2/0, 2/1-1; genu III: 2-1/1, 2/0-0. Lengths of leg I: 409 (388- 425), leg II: 338 (308-363), leg III: 320 (288-350), leg IV: 450 (375-493).

Chelicera ( Figure 2C ) — Fixed digit 35 (33-38) long, with 7 large teeth; movable digit 37 (35-40) long, with 3 large teeth.

Spermatheca ( Figure 2D ) — Calyx pocular ( Denmark et al., 1999), 9 (8-13) long and 8 wide at junction with vesicle; atrium indistinct.

Adult Male ( Figure 3 ) (n = 7)

Dorsum ( Figure 3A ) — Dorsal shield pattern similar to female, 293 (285-305) long and 196 (190-198) wide but solenostomes and poroids difficult to see in paratype males. Setae j1 23 (23-25), j3 36 (35- 38), j4 32 (30-33), j5 35 (33-38), j6 43, J2 41 (40-43), J3 27 (25-30), J4 24 (23-25), J5 12 (10-13), z2 38, z4 41 (38-45), z5 41 (35-43), Z1 42 (40-43), Z4 39 (38- 40), Z5 39 (38-40), s4 55, S2 43, S4 33, S5 29 (28-33), r3 35 (33-38), R1 29 (28-30). Setae J 3 inserted between J4 and Z4, slightly closer to the former and not strictly in line with J2 and J4. Setae r3 and R1 inserted on the lateral cuticle. No variation in the presence/absence of setae of the dorsal shield in the 7 paratype males collected and examined.

Peritreme ( Figure 3A ) — Extending anteriorly to the level between j1 and j3.

Venter ( Figure 3B ) — Sternogenital shield smooth, with 5 pairs of setae and 3 pairs of lyrifissures. Distances between st1-st1 57 (55-63), st2- st2 63, st3-st3 63, st4-st4 54 (53-55), st5-st5 45 (43- 48), st1-st5 123 (120-128). Ventrianal shield subtriangular and reticulated, 123 (120-125) long, 162 (153-168) wide at level of anterior corners and 72 (68-75) at level of anus; eroded, with 3 pairs of preanal setae (JV1, JV2 and ZV2), one pair of pre-anal solenostomes gv3 and 5 pairs of poroids; ventrianal shield not fused with the peritremal shields. Membrane surrounding the ventrianal shield with only one pair of setae (JV5) and no pore; JV5 30 (28-30) long, serrated.

Legs — Macrosetae on leg IV similar to the same in female: Sge IV 23 (21-25), Sti IV 22 (20-23), St IV 33 (30-35). No macrosetae on the other legs. Chaetotactic formula of genua II and III as in female. Lengths of leg I: 349 (338-375), II: 298 (288- 313), III: 293 (275-325), IV: 406 (375-438).

Chelicera ( Figure 3C ) — Spermatodactyl Lshaped; shaft 15 long, toe 11 (10-12). Teeth on movable and fixed digits not visible.

Type material: Holotype female, 26 paratype females and two paratype males (on 5 preparations with 6 females, 10 females and 1 male, 4 females, 1 female and 1 male, and 6 females, respectively) collected by S. Kreiter from Cyphomandra calycina Sendth (Solanaceae) at a place located 1 km from the Center of the City of Itatiaia , State of Rio de Janeiro (RJ), Brazil, 22°29’35" S, 44°33’59" W, 441 m high, October 1998, deposited in USP / ESALQ, Departamento de Fitopatologia , Entomologia and Zoologia agricola, laboratory of Acarology collection, Piracicaba, SP, Brazil. Twenty-four paratype females (on 4 preparations) and 5 paratype males (on 1 preparation) collected by S. Kreiter from Cyphomandra calycina Sendth (Solanaceae) at a place located 1 from the Center of the City of Itatiaia , State of Rio de Janeiro (RJ), Brazil, 22°32’38" S, 44°10’18" W, 385 m high, 10 October 1998, deposited in the SupAgro - INRA Acarology collection, Montpellier, France.

Etymology: This species is named after Professor Francisco Ferragut (Universita Politecnica de Valencia, Spain), who has greatly contributed to the taxonomy and biology of the phytoseiids.

Figures

FIGURE 1: Ragusaseius ferraguti n. g., n. sp.. Female. (A) – Dorsal idiosoma; (B) – Ventral idiosoma; (C) – Variation in shape of the ventrianal shield.

FIGURE 2: Ragusaseius ferraguti n. g., n. sp.. Female. (A) – Variation in shape of the ventrianal shield. The most common are a, b (female paratypes) and c (female holotype and several paratypes). Setae JV2 usually present. Only one specimen (g) with one member of setae ZV2 in addition to JV2; (B) – Leg IV; (C) – Chelicera; (D) – Spermatheca.

FIGURE 3: Ragusaseius ferraguti n. g., n. sp.. Male; (A) – Dorsal idiosoma; (B) – Ventral idiosoma; (C) – Spermatodactyl.