Dactyloscirus multiscutus Rocha, Rodrigues & Ferla

Rocha, Matheus Dos Santos, Rodrigues, Everton Nei Lopes & Ferla, Noeli Juarez, 2015, New species and records of cunaxid mites (Acari: Cunaxidae) from soil in Southern Brazil, Zootaxa 3981 (1) : -

Dactyloscirus multiscutus Rocha, Rodrigues & Ferla sp. nov.

LSID Number–urn:lsid:zoobank.org:act:94A971A0-FD47-405C-89D5-F82B9705F500 ( Figs.10–13 )

Diagnosis. Dactyloscirus multiscutus sp. nov. differs from all species of this genus by the hysterosomal region having five small reticulated platelets (a pair of lateral platelets and four pairs of median platelets) ( Fig. 10A ) and one terminal flattened seta on palpal tibiotarsi ( Fig. 10 B).

Dactyloscirus multiscutus sp. nov. resembles Dactyloscirus philippinensis Corpuz-Raros (1995) and Dactyloscirus pseudophilippinensis Skvarla & Dowling (2012) by the presence of large lateral platelets on the idiosoma, dorsal setae f1 and h1 equal in length, and median shield present, but can be distinguished from D. philippinensis by having the hysterosomal region with five pairs of small reticulated platelets, the palpal telofemora apophysis sub-rectangular distally; and one terminal flattened seta on the palpal tibiotarsi and two sts on basifemora IV.

It can be distinguished from D. pseudophilippinensis by having the hysterosomal region with five pairs of small reticulated platelets, one terminal flattened seta on palpal tibiotarsi and four sts on palpal tibiotarsi.

Female. (n=7) Idiosoma 401 (397–405) long, 306 (300–312) wide.

Gnathosoma . ( Fig. 11 A–C). Subcapitulum. ( Fig. 11 A). 278 (272–285) long, 2 pairs of adoral setae and 4 pairs of setae (hg1–4), hg4 longest. Deep lateral incisions between hg3 and hg4. Ventral region with reticulation.

Palp. ( Fig. 11 B). 361 (350–372) long, 5-segmented. Chaetotaxy: trochanter 0; basifemora 1 spls; telofemora 1 spls and 1 apophysis sub rectangular distally; genua 4 sts and 1 apophysis blunted distally between genua and tibiotarsi. Tibiotarsi 1 inner medial setae, 1 blunt tubercle, 2 sts, 1 terminal flattened setae. Tibiotarsi ends in a strong claw. Chelicera. ( Fig. 11 C). 232 (222–240) long, slender distally, integument granulated dorsally on the basal portion, each one with a narrow claw and dorsal setae present.

Dorsum. ( Fig. 12 A). Propodosomal shield present and reticulate, 2 pairs of setose trichobothria, at and pt, and tactile setae lps and mps present on shield. Hysterosomal region with 5 pairs of small reticulated platelets, without setae (a pair of lateral platelets and four pairs of median platelets). Four pairs located between the base of dorsal setae c1 and d1 and one pair present between the base of dorsal setae d1 and e1. Setae c1, c2,d1, e1, f1, h1, h2 simple and on integument. Setal lengths are as follows: at 241 (237–245), pt 272 (262–280) lps 10, mps 12 (10–15), c1 14 (12– 17), c2 13 (12–15), d1 19 (17–22), e1 21 (20–22), f1 31 (25–35), h1 33 (30–37) and h2 21 (20–22). Cupule im present, between e1 and f1.

Venter. ( Fig. 12 B). Partially covered by clearly demarcated plates. Coxal plates I and II connected, suture visible, with 6 pairs of setae; Coxae I are not reticulated, only posterolateral portion of coxae II. Coxal plates III and IV fused with reticulated pattern. Coxal plates with reticulated pattern. Coxae I–IV setal formula 3-3-3-3. Genital plates weakly sclerotized with 4 pairs of setae (g1–g4) and 2 pairs of papillae. Integument between coxal and genital shields with 5 pairs of setae. One pair of anal setae on anal valves, 1 pair of paranal setae and cupule ih laterad to posterior edge of genital shield.

Legs. ( Fig. 13 A–D). Leg I 376 (362–390), leg II 311 (310–312), leg III 386 (385–387), leg IV 412. Chaetotaxy: trochanters I-IV, 1-1-2-1; basifemora I-IV, 5-5-3-2; telofemora I-IV, 5-5-4-4; genua I with 4 ats, 1 mst, 4 sts; genua II 2 ats, 5 sts; genua III with 1 ats, 5 sts; genua IV with 2 ats, 5 sts; tibiae I with 2 ats, 1 mst, 4 sts; tibiae II with 1 ats, 5 sts; tibiae III with 1 bsl, 5 sts; tibiae IV with 1 smooth T, 4 sts; tarsi I with 1 fam, 4 ats, 1 dtsl, 14 sts; tarsi II with 1 lbsl, 1 dtsl, 20 sts (3 are spinose); tarsi III with 19 sts; tarsi IV with 17 sts.

Male and developmental stages. Unknown.

Etymology. The specific name is an adjective derived from the combination of words, “ multi ” many, “ scutus ” shields, referring to the presence of five pairs of platelets on the hysterosoma.

Types. Holotype. Female, Centro de Pesquisas e Conservação da Natureza Pró-Mata (29°28'31.40"S, 50°9'58.30"W), São Francisco de Paula, Rio Grande do Sul, (collected in leaf litter on Atlantic rainforest), 12/IX/ 2014, M.S. Rocha et al. leg., deposited in the Department of Entomology, Plant Pathology and Agricultural Zoology, Superior School of Agriculture “Luiz de Queiroz”, University of São Paulo (ESALQ/USP), Piracicaba, São Paulo, Brazil. Paratypes. One female, Centro de Pesquisas e Conservação da Natureza Pró-Mata (29°28'31.40"S, 50°9'58.30"W), São Francisco de Paula, Rio Grande do Sul (collected in leaf litter on Atlantic rainforest), 12/IX/2014, M.S. Rocha et al. leg., and five paratypes Centro de Pesquisas e Conservação da Natureza Pró-Mata (29°28'40.40"S, 50°10'8.00"W), São Francisco de Paula, Rio Grande do Sul (collected in leaf litter on Atlantic rainforest), 17/XII/2014, all deposited in the Museu de Ciências Naturais (ZAUMCN), UNIVATES— Centro Universitário, Lajeado, Rio Grande do Sul, Brazil.

Natural History. The leaf litter where specimens were collected was approximately 11 cm deep and mainly composed of leaves (35%) and roots (33%).

Figures

FIGURE 11. Dactyloscirus multiscutus sp. nov. Female, Gnathosoma— A. Subcapitulum; B. Palp, dorsal; C. Chelicera, dorsal.

FIGURE 12. Dactyloscirus multiscutus sp. nov. Female, Idiosoma— A. Dorsal; B. Ventral.

FIGURE 13. Dactyloscirus multiscutus sp. nov. Female, Legs, dorsal view, Reticulation illustrated on leg I basifemur present on all segments of all legs— A. Leg I; B. Leg II; C. Leg III; D. Leg IV.

FIGURE 10. A. Dactyloscirus multiscutus sp. nov. Female, Idiosoma, Dorsal view showing the pattern distribution of platelets. B. Dactyloscirus multiscutus sp. nov. Female, Gnathosoma, palp, terminal flattened setae.