Boreozercon emendi, Díaz-Aguilar, Irma & Ujvári, Zsolt, 2010

Díaz-Aguilar, Irma & Ujvári, Zsolt, 2010, New zerconid mites (Acari: Mesostigmata: Zerconidae) from Canada, with a review of the genus Mixozercon Halašková, 1963, Zootaxa 2555, pp. 1-29 : 17-24

Boreozercon emendi sp. nov.

( Figures 16–20 , 24 , 28 , 32 , 36 )

Material examined. Holotype: female collected in stand 930-CD, plot 5 (56° 48' 13.135'' N, 118° 19' 31.446'' W) at EMEND research study site, northeastern area, from mosses and needle leaf-litter, 9.09.2006, leg. Díaz- Aguilar, I. (deposited in CNC). Paratypes: stand, plot, collector and date as for holotype (2 males, 1 DN deposited in CNC, 1 female deposited in HNHM); stand 918-CD, plot 6, northern area, from mosses and needle leaf-litter on forest floor, 7.09.2006., Diaz-Aguilar, I. (2 females, 1 DN deposited in HNHM, 1 female deposited in CNC); stand 930-CD plots 3, 4 and 5, northern area, from mosses and needle leaf-litter on forest floor, 9.09.2006., Diaz-Aguilar, I. (30 females, 3 males, 5 DN); stand 918-CD, plot 6, northern area, from mosses and needle leaf-litter on forest floor, 7.09.2006, leg. Díaz-Aguilar, I. (3 females).

Diagnosis. Adult female. Podonotal setae j3-j5, z1 and s1-s2 smooth, others pilose. All opisthonotal setae pilose. J and Z setal rows inserted in small setal bases. Setae J5 situated anterior to the dorsal cavities. Setae S1 situated posterolateral to Z1. Pores Po2 situated inside a line connecting Z1 and Z2. Podonotum covered by circular, squamous pattern, the area between J setal-rows densely ornamented by small, subtriangular or irregular depressions. Dorsal cavities weakly sclerotised, with undulate anterior margins. Peritrematal shield expanded posteriorly, its posterolateral ends reaching beyond the level of R5. Post-genital sclerites present. Anterior margin of ventri-anal shield with one pair of setae.

Description. Female. Length of idiosoma 332–352μm (mean 345); width 245–260μm (mean 255) (n = 5). Dorsum ( Figs 16 , 24 ). Podonotum with 22 pairs of setae: j-row with six pairs, z-row with two pairs, s-row with six pairs, r-row with six pairs, p-row with two pairs. Setae j1 and j2 barbed, j6, z2 and s3-s6 pilose to varying degrees, other j-, z- and s-setae short, smooth and needle-like. Marginal setae r1 short and smooth, others elongate, densely pilose. Pores po1 situated posterior to s1, po2 lying on a line connecting j4 and s4, po3 on a line connecting s5 and s6. Podonotum covered by irregular, disk-like, squamous pattern ( Fig. 36 ), the pair of circular markings between setae z1 well-developed. Opisthonotum ( Figs 28 , 32 ) with 23 pairs of setae: J-row with six pairs, Z-row with five pairs, S-row with four pairs and R-row with eight pairs. Setae J1-J5, Z1- Z4 and S1 uniform, slightly increasing in length posteriorly, densely pilose, pointed; J and Z setae forming an arrangement of lines. Setae J5 situated above the line of the dorsal fossae. Setae J1-J4 and Z2 reaching the bases of the following seta, Z3 not reaching the insertion of Z4. Setae Z5 short, pilose. Setae S1 situated posterolateral to Z1, S2 lateral to Z2. Setae J6 and S2-S4 uniform, elongate, plumose, brush-like, extending beyond lateral margin of idiosoma. Opisthonotal J-, Z- and S-setae situated on small setal bases. Eight marginal R-setae short, curved and distinctly barbed. Pores Po1 situated anteromedial to Z1, Po2 inside a line connecting the insertions of Z1 and Z2, Po3 small, lying on a line connecting J4 and Z4, Po4 lying medial to insertions of S4. Lateral area of opisthonotum smooth, medial part covered by distinct, subtriangular or irregular pits ( Fig. 28 ). Dorsal cavities weakly sclerotised, uniform, with undulate anterior margin and axes parallel to that of the body. The length of opisthonotal setae and the distances between their insertions as in Table 5 .

female male DN female male DN female male DN Venter ( Fig. 17 ). Peritrematal shield not separated from body margin, posterolateral ends pointed, expanded posteriorly, reaching beyond level of setae R5. Peritremes straight. One pair of post-genital sclerites present, adgenital gland openings absent. Anterior margin of ventri-anal shield with one pair of setae and 15 ventri-anal setae, Vl1 absent. Pre-anal setae short simple, post-anal seta elongate, distally pilose. Ventri-anal pores situated posterolateral to adanal setae. Sternal shield with reticulate ornamentation, ventri-anal shield covered by squamous pattern.

Male. Length of idiosoma 265 μm; width 185 μm (n = 1). Chaetotaxy, poroidotaxy and sculpturing pattern of dorsal shields similar to female ( Fig. 18 ), except setae s4 and s5 smooth and setae J4 not reaching the bases of J5. Sternogenital shield bearing five pairs of setae ( Fig. 19 ). Peritrematal shield and ventri-anal shield fused laterally, between the level of setae R3 and R4, not separated from the body margin. Two openings of glands gv2 situated on small adgenital sclerites. As for female, anterior margin of ventri-anal shield with one pair of setae, setae Vl1 absent. The length of J, Z and S setae and the distances between their insertions as in Table 5 .

Deutonymph ( Fig. 20 ). Length of idiosoma: 283–287μm (mean 285); width 180μm (n = 2). Setae z2, s4- s6 and r5 barbed, s3, r3 and r6 elongate, densely pilose. Other podonotal setae smooth, needle-like. Chaetotaxy of opisthonotum as in adult stages, except that in deutonymphs the pilosity of marginal setae decreases posteriorly, and J5 is situated at the level of the dorsal cavities. Poroidotaxy of dorsal shields also similar to that of mature stages. The pattern of podonotum weakly developed, surface of opisthonotum finely punctate in the area of J setal-row. Length of opisthonotal setae and the distances between their insertions as in Table 5 .

Protonymph and larva. Unknown.

Etymology. The name of the new species refers to the EMEND research study site, where it was collected.

Figures

FIGURE 16. Boreozercon emendi sp. nov., dorsal view of female.

FIGURES 17 – 20. Boreozercon emendi sp. nov. 17. Ventral view of female; 18. Dorsal view of male; 19. Ventral view of male; 20. Dorsal view of deutonymph.

FIGURES 21 – 24. Females of the new species, dorsal view, SEM photos (scale bar 100 µm). 21. Mixozercon albertaensis sp. nov.; 22. Mixozercon jasoniana sp. nov.; 23. Mixozercon borealis sp. nov.; 24. Boreozercon emendi sp. nov.

FIGURES 25 – 28. Central surface of opisthonotum of the new species, SEM photos (scale bar 25 µm). 25. Mixozercon albertaensis sp. nov.; 26. Mixozercon jasoniana sp. nov.; 27. Mixozercon borealis sp. nov.; 28. Boreozercon emendi sp. nov.

FIGURES 29 – 32. Lateral surface of opisthonotum of the new species, SEM photos (scale bar 25 µm). 29. Mixozercon albertaensis sp. nov.; 30. Mixozercon jasoniana sp. nov.; 31. Mixozercon borealis sp. nov.; 32. Boreozercon emendi sp. nov.

FIGURES 33 – 36. Central surface of podonotum of the new species, SEM photos (scale bar 25 µm). 33. Mixozercon albertaensis sp. nov.; 34. Mixozercon jasoniana sp. nov.; 35. Mixozercon borealis sp. nov.; 36. Boreozercon emendi sp. nov.

Tables

TABLE 5. Length of opisthonotal setae and longitudinal distances between their bases in Boreozercon emendi sp. nov. (measurements in µm).

I1	21	18	15	Z1	20	14	15	S1	23	16	16
I1-I2 I2	33 27	21 18	27 16	Z1-Z2 Z2	36 25	30 16	28 16	S1-S2 S2	34 38	26 29	28 30
I2-I3	29	19	23	Z2-Z3	23	17	16	S2-S3	42	27	29
I3 I3-I4	26 26	17 19	19 20	Z3 Z3-Z4	25 30	18 21	20 23	S3 S3-S4	36 48	28 31	29 31
I4	27	20	19	Z4	26	19	17	S4	40	28	31
I4-I5 I5	30 29	29 19	30 17	Z4-Z5 Z5	55 15	44 8	39 9
I5-I6	44	30	22
I6	38	27	30