Amblyseius caliginosus Ferragut

Dataset
Phytoseiid mites (Acari: Phytoseiidae) from Patagonia and Tierra del Fuego: Rank
SPECIES: Published in
Ferragut, Francisco, Navia, Denise (2015): Phytoseiid mites (Acari: Phytoseiidae) from Patagonia and Tierra del Fuego. Zootaxa 3990 (4): 525-550, DOI: 10.11646/zootaxa.3990.4.3

Classification

kingdom
Animalia: phylum
Arthropoda: class
Arachnida: order
Mesostigmata: family
Phytoseiidae: genus
Amblyseius: species
Amblyseius caliginosus

description

FEMALE (Figures 39 – 43) (three females measured) Dorsal surface. Dorsal shield smooth, 418 (418 – 427) long, 222 (222 – 252) wide. Seventeen pairs of smooth and acute setae, except Z 5 serrated. Setae j 1 and j 3 straight and oriented forward in live specimens. Seta j 1 35 (34 – 35), j 3 52 (49 – 52), j 4 9 (9 – 10), j 5 8 (7 – 8), j 6 10 (10 – 12), J 2 11 (11 – 12), J 5 8 (7 – 8), z 2 19 (19 – 21), z 4 18 (17 – 20), z 5 9 (8 – 9), Z 1 14 (14 – 15), Z 4 72 (70 – 75), Z 5 99 (97 – 100), s 4 54 (54 – 56), S 2 18 (18 – 19), S 4 15 (15 – 16), S 5 13 (12 – 13), r 3 20, R 1 20 (20 – 22). Seven pairs of solenostomes; gd 9 anteromedial to S 5. Distance gd 9 – S 5 17; distance gd 9 – Z 5 24. Peritremes fully developed, reaching setae j 1. Ventral surface. Sternal shield smooth, with three pairs of setae. Distance st 1 – st 3 80 (80 – 84), distance st 2 – st 2 85 (85 – 86). Seta st 4 on metasternal platelets. Posterior margin of shield straight. Genital shield 87 (87 – 100) wide. Ventrianal shield smooth, with two lateral areas of muscle attachments on the posterior margin, at the level of anus. Anterior part wider than posterior, 136 (136 – 146) long, 109 (105 – 109) wide at level of ZV 2. Three pairs of pre-anal setae; crescentic and close pre-anal pores, distance 23 (23 – 24). Four pairs of setae around the shield, JV 5 48 (47 – 48). Chelicerae. Fixed digit with about nine teeth; movable digit with three teeth. Insemination apparatus. Calyx saccular, major duct narrow, atrium C-shaped and prominent. Legs. Genu II with seven setae; 2 – 2 / 0, 2 / 0 – 1. Macroseta on genu I not very distinctive from other setae in the segment, 24 (24 – 26) long, macroseta on genu II 35, genu III 32 (32 – 36). Leg IV with three long and blunt macrosetae; msge 62 (62 – 64), msti 54 (52 – 54), msta 51 (51 – 52). MALE (Figures 44 – 45): (two males measured) Dorsal surface. Dorsal shield smooth, 348 (346 – 350) long, 216 (212 – 220) wide. Nineteen pairs of smooth and acute setae, except for Z 4 and Z 5 which are slightly serrated. Seta j 1 29 (27 – 30), j 3 41 (40 – 42), j 4 8 (7 – 8), j 5 6 (5 – 6), j 6 12 (11 – 12), J 2 12, J 5 10 (9 – 10), z 2 14 (13 – 14), z 4 17, z 5 8, Z 1 15 (14 – 15), Z 4 56 (55 – 57), Z 5 74 (73 – 74), s 4 47 (46 – 48), S 2 17 (16 – 18), S 4 13 (12 – 13), S 5 12 (11 – 12), r 3 19 (18 – 20), R 1 17 (15 – 18). Seven pairs of dorsal solenostomes. Peritremes extending almost to bases of setae j 1. Ventral surface. Ventrianal shield subtriangular with anterior margin convex, 152 (150 – 154) long, 179 (178 – 180) wide at level of anterior corners. Surface smooth with scant anterior striae, bearing five pairs of pre-anal setae, four pairs of poroids and a pair of crescentic pores posteromesad to JV 2. Two prominent lateral areas of muscle attachments on the anterior corners of the shield. Seta JV 5 40 (39 – 40). Chelicerae. Fixed digit apparently with eight teeth; movable digit unidentate. Spermatodactyl L-shaped, with a well-developed lateral projection. Legs. Leg IV with three blunt macrosetae; macroseta on genu 50 (49 – 50), tibia 38 (37 – 38) and basitarsus 47 (46 – 47).

diagnosis

Diagnosis. Female dorsal shield smooth. Dorsal setal pattern 10 A: 9 B. Seventeen pairs of dorsal setae, Z 5 serrated. Seta j 3 much longer than j 1 and similar in length to s 4. Seven pairs of dorsal solenostomes. Peritremes reaching seta j 1. Sternal shield with three pairs of setae and posterior margin straight. Ventrianal shield smooth, with three pairs of setae and pre-anal pores crescentic. Calyx of spermatheca saccular. Fixed digit in the chelicerae with nine teeth; movable digit three – toothed. Genu II with seven setae. Leg IV with three long macrosetae; msti and msta similar in length and shorter than msge. Male ventrianal shield anteriorly convex; five pairs of pre-anal setae. Spermatodactyl L-shaped.

discussion

Comments. This species belongs to the nicola subgroup of the obtusus species group (Chant & McMurtry, 2004) and is most similar to A. grandiporus. It can be differentiated by the absence of hypertrophied pre-anal pores, by the largest length of seta j 3 related to j 1 and the insertion of seta JV 2 relative to the pre-anal pores. In addition, A. caliginosus has only nine teeth on fixed digit and the male shows five pairs of pre-anal setae.

etymology

Etymology. The specific name caliginosus means " gloomy " or " foggy " and refers to the humid and dark forest where the mite was collected in Chile.

materials_examined

Type material. One female holotype, two female paratypes and two male paratypes on Saxegothaea conspicua. Tinquilco Lake near Pucón (Chile); 39 º 10 ' 09 " S, 71 º 43 ' 33 " W; 814 m asl; 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 / 17391; 1 female paratype MNCN 20.02 / 17392; 2 male paratypes (MNCN 20.02 / 17393; MNCN 20.02 / 17394).

Name

Homonyms: Amblyseius caliginosus Ferragut