Agistemus mendozensis Simons,

Johann, Liana, Carvalho, Gervásio Silva, Majolo, Fernanda & Ferla, Noeli Juarez, 2013, Stigmaeid mites (Acari: Stigmaeidae) from vineyards in the state of Rio Grande do Sul, Brazil, Zootaxa 3701 (2), pp. 238-256: 245-246

publication ID

http://dx.doi.org/10.11646/zootaxa.3701.2.6

publication LSID

lsid:zoobank.org:pub:C424582D-0578-43EF-947C-D673EB1DF571

persistent identifier

http://treatment.plazi.org/id/03E0BF64-FFA3-4C3E-FF67-FF1CFE4A45B5

treatment provided by

Plazi

scientific name

Agistemus mendozensis Simons
status

 

Agistemus mendozensis Simons 

( Fig. 4View FIGURE 4)

Agistemus mendozensis Simons, 1967: 56  , figs. 1–10.

Redescription. FEMALE. Gnathosoma  . Palp coxae with 1 spiniform seta; trochanter without setae; femur with 3 long and serrate setae, one of them more robust; genu with 1 serrate seta; tibia with 3 setae and 1 claw, tarsus with 4 setae, 2 solenidia and 1 trifurcated sensillum ( Fig. 4View FIGURE 4 B). Infracapitulum with 2 pairs of long setae and 2 pairs of adoral setae distally. Idiosoma  . Oval outline. Dorsum: Prodorsal shield reticulated with 3 pairs of serrate setae, 1 pair of eyes and 1 pair of post-ocular bodies. Hysterosomal shield reticulated with 5 pairs of short serrate setae, not reaching the bases of surrounding setae. 4 small, smooth shields each with 1 lanceolate seta (setae c 2 and f). Suranal shield smooth with 2 pairs of setae, h 1 and h 2. Venter: 3 pairs of slender setae between coxae inserted on small shields, 1 a at level of coxa II, 3 a anterior to coxa III and 4 a at level of coxa IV. Anogenital regions with a horseshoe-shaped shield surrounding genital opening anteriorly ( Fig. 4View FIGURE 4 C) with 2 pairs of agenital setae (ag 1 and ag 2). Genital region with 4 pairs of setae (g 1, ps 3, ps 2 and ps 1). Seta g 1 almost reaching the base of ps 1. Setae ps 3, ps 2, and ps 1 robust and slightly serrate. Leg I – IV setation ( Fig. 4View FIGURE 4 D): coxae 2 (1)- 1-2 - 1; trochanters 1 - 1 - 1 - 1; femora 4 - 4 - 2 - 2; genua 3 -0-0-0; tibiae 5 (1)- 5 (1)- 5 (1)- 4; tarsi 11 (1)- 9 (1)- 7 (1)- 7.

MALE. Unknown.

Material examined. CAS-04 (MCN). 2 females from Candiota, V. vinifera, Merlot  cultivar: 1 female, 14 February 2007, coll. C.L.Klock; 1 female, 18 May 2007, coll. C.L.Klock.

Distribution. This species was reported on apple trees ( Malus  sp.) in Argentina (Simons 1967). Ruiz (2007) noted that this species is one of the most abundant in apple orchards in the Rio Negro province, Argentina. This is the first time it was found in the state of Rio Grande do Sul, Brazil.

Measurements of this species are provided in Table 3.

Character measured Females (n= 2) Female holotype (Simons 1967)

Mean SD Max Min

SD = Standard Desviation

TABLE 3. Measurements of Agistemus mendozensis Simons 1967. (females)

Body length 426 23.0 442 410  
    19.4 325 298  
  225 21.2 240 210  
    1.4 0.04     21 0.30–0.50
    0.06     0.58–0.68
    0.01     0.35–0.43
    0.06     0.93–1.10
    0.06      
    0.23