Typhlodromips valdivianus Ferragut

Ferragut, Francisco & Navia, Denise, 2015, Phytoseiid mites (Acari: Phytoseiidae) from Patagonia and Tierra del Fuego, Zootaxa 3990 (4), pp. 525-550 : 533-535

Typhlodromips valdivianus Ferragut n. sp.

( Figures 19–25 )

Diagnosis. Female dorsal shield evenly smooth, with seventeen pairs of setae, only Z5 lightly serrated. Dorsal setal pattern 10A:9B. Seven pairs of dorsal solenostomes. Peritremes reaching j1. Sternal shield with three pairs of setae, posterior margin straight or concave. Ventrianal shield vase-shaped, with three pairs of pre-anal setae and pores gv3 crescentic. Calyx of spermatheca saccular. Chelicerae not well visible; apparently, fixed digit with seven teeth, movable digit three-toothed. Genu II with seven setae. Three macrosetae on leg IV similar in length. Male ventrianal shield anteriorly lobate, with four pairs of pre-anal setae and crescentic pores gv3. Spermatodactyl Lshaped.

FEMALE ( Figures 19–22 ) (five females measured)

Dorsal surface. Dorsal shield completely smooth, 425 (416–425) long, 240 (235–250) wide. Seventeen pairs of smooth and acute setae, being Z4 and Z5 lightly serrated. Seta j1 32 (32–34), j3 43 (42–44), j4 16 (12–16), j5 12 (12–13), j6 17 (16–17), J2 20 (18–20), J5 12 (12–13), z2 23 (19–23), z4 22 (17–22), z5 12 (10–12), Z1 20 (19–20), Z4 46 (45–48), Z5 65 (65–68), s4 42 (42–47), S2 20 (19–20), S4 17 (16–19), S5 15 (14–16), r3 23 (20–23), R1 20 (19–23). Seven pairs of punctiform solenostomes; gd1 posteolateral to j3, between j3 and z2, distance gd1–j3 17; gd2 medial to z4, distance gd2–z 4 16–17; gd9 anteromedial to S5, distance gd9– S 5 12–16. Peritremes broad and fully developed, reaching setae j1.

Ventral surface. Sternal shield wider than long, with three pairs of setae. Distance st1–st3 77 (73–77), distance st2–st2 82 (80–83). Seta st4 on metasternal platelets. Surface of shield smooth and posterior margin straight to concave. Genital shield 77 (77–85) wide. Ventrianal shield vase-shaped, longer than wide, with anterior margin straight and laterals concave, 135 (134–140) long, 90 (90–103) wide at level of ZV2, 82 (82–89) at level of concavity. Surface smooth and with two lateral areas of muscle attachments on the posterior margin, at the level of anus. Three pairs of pre-anal setae; pre-anal (gv3) pores crescentic, distance between them 19 (19–22). Four pairs of setae around the shield, JV5 smooth 45 (45–46).

Chelicerae. Chelicerae not clearly discernible on the examined specimens. Apparently, fixed digit with seven teeth, movable digit with three teeth.

Insemination apparatus. Calyx saccular, 18 long. Atrium C-shaped, major duct broad.

Legs. Genu II with seven setae; 2 2/0 2/0 1. Macroseta on genu I 27 (27–28), genu II 25 (24–28), genu III 31 (31–33). Leg IV with three long and blunt macrosetae, proximal part stout, distal part thin. Macroseta on genu IV 48 (48–53), tibia IV 48 (45–48) and basitarsus IV 51 (47–51).

MALE ( Figures 23–25 ) (two males measured).

Dorsal surface. Dorsal shield smooth and well sclerotised, 338 (330–345) long, 195 (190–200) wide. Nineteen pairs of smooth and acute setae. Seta j1 29 (28–29), j3 39 (38–40), j4 13, j5 12 (11–13), j6 15 (14–15), J2 20 (19– 20), J5 10, z2 18 (17–19), z4 17 (16–18), z5 10 (9–10), Z1 18 (17–18), Z4 39 (37–40), Z5 57 (56–58), s4 35 (34– 36), S2 17, S4 16 (15–16), S5 16 (15–16), r3 20 (19–20), R1 16 (15–16). Seven pairs of punctiform solenostomes. Peritremes ending between setae j1–j3.

Ventral surface. Ventrianal shield subtriangular, with anterior margin striated and lobate, 158 (154–162) long, 182 (174–190) wide. Four pairs of pre-anal setae; pre-anal (gv3) pores crescentic and close each other. Distance between pores gv3, 20 (19–21), shorter than distance between setae JV2. Seta JV5 33 (32–34).

Chelicerae. Fixed digit with six small teeth; movable digit with a strong tooth. Spermatodactyl L-shaped, with an acute lateral projection.

Legs. Macrosetae on genu I 28, genu II 25 (24–26), genu III 24 (23–25), genu IV 39, tibia IV 36 (35–37) and basitarsus IV 39 (38–39).

Type material. Holotype female, two female paratypes and one male paratype on Saxegothaea conspicua Puerto Blest, Bariloche ( Argentina) , near the Argentina-Chile border; 41º 01'10" S, 71º 09'35" W; 837 m asl. 3 January 2013; two females and one male paratypes on Nothofagus dombeyi, Tinquilco Lake near Pucón ( Chile); 39º 10'09" S, 71º 43'33" W; 814 m asl (above sea level); 6 January 2013. Holotype and some paratypes were deposited at Museo Nacional de Ciencias Naturales, Madrid, Spain ( MNCN). Reference number of holotype: MNCN 20.02/17385; 1 female paratype MNCN 20.02/17386; 1 male paratype MNCN 20.02/17387.

Etymology. The species name valdivianus derives from the evergreen Valdivian rain forests in which the mites were collected.

Comments. This species belongs to the ariri species group ( Chant & McMurtry, 2005) in which a few taxa have ventrianal shield vase-shaped, seven setae on genu II and three macrosetae on leg IV. Typhlodromips hamiltoni Chant & Yoshida-Shaul differs by having a cup-shaped spermatheca, macroseta on tibia IV shorter than macrosetae on genu and tarsus IV and only five pairs of dorsal solenostomes. Furthermore, setae Z4 and Z5 are, respectively, 60 and 113 long in T. hamiltoni and 44 and 65 in T. valdivianus . Typhlodromips robusticalyx Moraes, Zannou & Oliveira and T. sinensis Denmark & Muma have funnel-shaped calyx and ten denticles on fixed digit in the chelicera, instead of saccular calyx and seven teeth. Typhlodromips fordycei (De Leon) and T. compressus (Wu & Li) also resemble the new species. Both species have dorsal shield striated to reticulated instead of smooth and two and one macrosetae on leg IV, respectively, instead of three longer macrosetae in T. valdivianus .

Figures

FIGURES 19 – 22. Typhlodromips valdivianus n. sp. female. 19. Dorsal shield, 20. Ventral surface, 21. Spermatheca, 22. Genu, tibia and tarsus of leg IV.

FIGURES 23 – 25. Typhlodromips valdivianus n. sp. male. 23. Dorsal shield, 24. Chelicera with spermatodactyl, 25. Ventrianal shield.