Neoseiulus mapuche Ferragut

Ferragut, Francisco & Navia, Denise, 2015, Phytoseiid mites (Acari: Phytoseiidae) from Patagonia and Tierra del Fuego, Zootaxa 3990 (4), pp. 525-550 : 530-533

Neoseiulus mapuche Ferragut n. sp.

( Figures 11–18 )

Diagnosis. Distinctive features are: female dorsal shield mostly smooth, only striated and lightly reticulated on anterolateral margins and opisthosoma; dorsal setae on podoscutum relatively short; wide ventrianal shield, as wide as or wider at level of anus than at level of seta ZV2. Dorsal setal pattern 10A:9B. Seventeen pairs of short and smooth setae; setae S4, S5, Z4, Z5 and J5 serrated. Seven pairs of dorsal solenostomes. Peritremes extend to j1. Sternal shield with three pairs of setae; posterior margin straight. Ventrianal shield pentagonal, with three pairs of short setae and crescentic pores. Calyx of spermatheca saccular. Fixed digit of chelicera with five to seven teeth, movable unidentate. Genu II with seven setae. One macroseta on tarsus IV. Male ventrianal shield with four pairs of setae and pre-anal pores crescentic and close to each other.

FEMALE ( Figures 11–15 ) (eleven females measured).

Dorsal surface. Dorsal shield 415 (408–435) long, 225 (216–234) wide. Anterolateral margins striated to reticulated, rounded cells between setae j5, z5 and j6, opisthosoma striated to weakly reticulate. Seventeen pairs of short, sharp and smooth setae, except for S4, S5, Z4, Z5 and J5 which are thick and serrated. Setae S4, S5 and Z 5 set on tubercles. Seta j1 23 (19–33), j3 17 (16–21), j4 11 (11–18), j5 12 (11–14), j6 13 (11–14), J2 15 (14–16), J5 14 (12–16), z2 16 (12–17), z4 17 (15–18), z5 11 (11–15), Z1 15 (13–19), Z4 28 (24–29), Z5 60 (52–62), s4 22 (21–25), S2 22 (20–26), S4 27 (25–32), S5 28 (25–32), r3 21 (20–23), R1 17 (17–24). Seven pairs of punctiform dorsal solenostomes; gd1 lateral to j3, gd8 anterolateral to Z4, gd9 posteromedial to S5. Distance gd8–Z4 30, distance gd9– S5 15. Poroid idl2 prominent and located on the margin of dorsal shield, idl3 widely spaced from the margin. Peritremes broad and fully developed, reaching setae j1.

Ventral surface. Sternal shield longer than wide, with three pairs of setae. Distance st1–st3 72 (72–81), distance st2–st2 67 (66–70). Seta st4 on metasternal platelets. Posterior margin of shield straight. Genital shield 84 (82–92) wide. Ventrianal shield pentagonal and lightly striated, with anterior angles rounded, 139 (135–147) long, 111 (105–121) wide at level of ZV2, 118 (113–121) wide at level of preanus. Three pairs of pre-anal setae very short (9–10 µm long); pre-anal (gv3) pores crescentic, close each other 19 (16–22) and posteromediad to JV2. Lateral margins of the shield with two large muscle attachment areas at level of anus. Platelets spga elongated and located on the anterior angles of the shield. Four pairs of setae and four of poroids surrounding the shield, JV5 33 (33–40).

Chelicerae. Fixed digit with five to seven teeth; movable digit unidentate.

Insemination apparatus. Calyx saccular 14 long, atrium C-shaped, major duct broad.

Legs. Genu II with seven setae; 2–2/0, 2/0–1. Leg IV with one macroseta on basitarsus 37 (32–37) long; macrosetae on genu and tibia IV indistinguishable.

MALE ( Figures 16–18 ) (five males measured).

Dorsal surface. Dorsal shield 342 (338–350) long, 214 (208–220) wide, distinctly reticulated. Nineteen pairs of thick and acute setae, being Z4 and Z5 serrated. Seta j1 18 (15–20), j3 16 (14–17), j4 11 (10–13), j5 11 (10–11), j6 12 (11–12), J2 14 (12–15), J5 13 (12–14), z2 15 (14–16), z4 15 (12–17), z5 11 (10–11), Z1 13 (11–14), Z4 22 (21–22), Z5 37 (35–42), s4 19 (18–20), S2 18 (16–19), S4 24 (23–24), S5 24 (22–25), r3 19 (17–21), R1 18 (16– 18). Seven pairs of dorsal solenostomes. Peritremes extend to bases of setae j1.

Ventral surface. Ventrianal shield 143 (140–148) long, 178 (166–190) wide. Surface striated with polygonal cells around anal opening. Anterior margin strongly convex. Two large lateral areas of muscle attachments on the posterior margin. Four pairs of pre-anal setae and four pairs of poroids. Pre-anal (gv3) pores crescentic and near each other. Distance between pores shorter than distance between setae JV2.

Chelicerae. Fixed digit with two strong teeth and three to five small denticles, movable digit with one tooth. Spermatodactyl L-shaped with an acute lateral projection.

Legs. Macroseta on leg IV short, blunt and curved, 29 (25–32) long.

Type material. Holotype female, ten female paratypes and six male paratypes on Saxegothaea conspicua Lindl. (Podocarpaceae) . Puerto Blest, Bariloche ( Argentina), near the Argentina-Chile border; 41º 01'10" S, 71º 09'35" W; 837 m asl. 3 January 2013. Holotype and some paratypes were deposited at Museo Nacional de Ciencias Naturales, Madrid, Spain ( MNCN). Reference number of holotype: MNCN 20.02/17379; 3 female paratypes ( MNCN 20.02/17380, MNCN 20.02/17381, MNCN 20.02/17382); 2 male paratypes ( MNCN 20.02/17383, MNCN 20.02/17384).

Etymology. The term mapuche refers to the original inhabitants of the territories in south-central Chile and southwestern Argentina, the most numerous group of Indians in South America.

Comments. This species belongs to the cucumeris subgroup in the cucumeris species group according to Chant & McMurtry (2003). Only four species in the subgroup have calyx bell or cup-shaped, seven setae on genu II and seven pairs of dorsal solenostomes. Neoseiulus mapuche can be differentiated from N. arenarius Denmark & Edland and N. communis Denmark & Edland by having the dorsal shield mostly smooth, five to seven teeth in the cheliceral fixed digit and only one macroseta on tarsus IV. It differs from N. koyamanus Ehara & Yokogawa by having only one tooth on movable digit of chelicera. Finally, N. umbraticus (Chant) has three macrosetae on leg IV, peritreme to j3 and the male six pairs of pre-anal setae. The wide ventrianal shield and short dorsal setae closely resembles this species with N. camarus (El-Badry) , N. ellesmerei (Chant & Hansell) , N. inabanus (Ehara) and N. paraibensis (Moraes & McMurtry) . Neoseiulus camarus and N. ellesmerei differ from the new species by having a bell-shaped calyx with a distinct neck between calyx and atrium. Neoseiulus inabanus and N. paraibensis have the dorsal shield evenly or partially reticulated instead of mostly smooth and they have, respectively, two and three medium to long macrosetae on leg IV, instead of one short macroseta. In addition, the calyx in the spermatheca is different, being short cup or bell-shaped in N. paraibensis and N. inabanus , respectively, and saccular in N. mapuche .

Figures

FIGURES 11 – 15. Neoseiulus mapuche n. sp. female. 11. Dorsal shield, 12. Ventral surface, 13. Chelicera, 14. Spermatheca, 15. Genu, tibia and tarsus of leg IV.

FIGURES 16 – 18. Neoseiulus mapuche n. sp. male. 16. Dorsal shield, 17. Chelicera with spermatodactyl, 18. Ventrianal shield.