Oziella ovalis, Chetverikov, Philipp E., 2016

Chetverikov, Philipp E., 2016, New species and records of phytoptid mites (Acari: Eriophyoidea: Phytoptidae) on sedges (Cyperaceae) from the Russian Far East, Zootaxa 4061 (4), pp. 367-380 : 369-374

Oziella ovalis n. sp.

( Figs. 2–4 )

HOLOTYPE FEMALE. Idiosoma vermiform, 325, 63 wide. Prodorsal shield subtriangular, with anterior margin weakly rounded and slightly indented medially. Prodorsal shield ornamentation consisting of median, two admedian, four submedian and two arc-like lines. Median line short, visible in posterior third or half of shield and crossed by short, transverse line forming indistinct cruciform figure. Admedian lines slightly diverging in posterior third of shield and converging anteriorly, together forming a bottle-like figure. Two tiny lines present between median and admedian lines near posterior shield margin. Submedian 1 and 2 lines short, present in anterior half of shield. In three paratypes, submedian-2 posteriorly joins arc-like line surrounding tubercle sc. Submedian-3 with 4 short lines laterad of prodorsal shield, lateral to tubercles of sc and ve. Submedian-4 posteriorly curved. Eye-like area of flat cuticle1 laterally to ve not apparent. Otherwise typical for many Oziella spp., distinct granulation on surface of prodorsal shield anterior to ve not apparent. Prodorsal shield 29, 48 wide; ve 17, directed forward and slightly laterally; tubercles 27 apart; sc 9 long, directed up or backwards, tubercles 21 apart. Distance between tubercles of ve and sc 18. Gnathosoma 20. Dorsal pedipalp genual setae d 10; pedipalp coxal setae ep minute, 2. Leg I 28, tibia 8, l' 2, tibial solenidion φ 5; tarsus 5, u' 3, ft' 18, ft'' 21, ω 7, without knob; empodium 7/6-rayed, 10 long; bv 9. Leg II 26, tibia 6, tarsus 4, u' 2, ft' 17, ft'' 20, ω 8, without knob; empodium 7/6-rayed, 10 long; bv 10. Coxae without several strong longitudinal lines and granulation anterior to tubercles of setae 1b and 2a. Subcapitular plate rounded, flat. Setae 1b 8, 16 apart; 1a 12, 11 apart; 2a 65, 29 apart. Prosternal apodeme well developed, entire (not divided anteriorly) and three-forked posteriorly. Genital coverflap 7, 22 wide, flat, slightly indented posteromedially; 3a 13; three complete and one-two incomplete annuli present anterior to epigynium.

1. = “eye-like structure” sensu Smith 1977 Characters Ozie̸̸a oνa̸is n. sp. Ozie̸̸a νirgata n. sp.

Females (n=6) Females (n=10) Nymphs (n=3) Males (n=5)

Mean±SD Min‾Max Mean±SD Min‾Max Mean Min‾Max Mean±SD Min‾Max Length οf bοdy 286±21.9 260‾325 321±29.1 280‾363 272 264‾283 301±16.9 282‾315 ……continued on the next page TABLE 1 . (Cοntinued)

Characters Ozie̸̸a oνa̸is n. sp. Ozie̸̸a νirgata n. sp.

Females (n=6) Females (n=10) Nymphs (n=3) Males (n=5)

Mean±SD Min‾Max Mean±SD Min‾Max Mean Min‾Max Mean±SD Min‾Max Distance between 1a 11±0.5 11‾12 11±1.0 10‾ 13 11 10 ‾11 11±0.6 11‾12 Length οf 2a 64±2.6 60‾67 33±7.1 25‾49 19 16‾23 41±8.0 33‾49 Distance between 2a 28±0.8 27‾29 27±1.9 24‾30 23 21‾25 26±1.5 25‾28 Length οf epigynium⁄epiandrium 9±0.5 9‾10 10±0.8 9‾11 ‾ ‾ 6±1.0 5‾7 Width οf epigynium⁄epiandrium 23±0.8 22‾24 20±0.9 18‾21 ‾ ‾ 17±1.2 16‾18 Length οf 3a (s.gen.) 13±1.7 10‾15 11±1.4 9‾ 14 2 1 ‾2 10±1.2 9‾11 Length οf c1 83±3.9 80‾90 59±3.1 55‾65 31 26‾34 43±6.4 36‾48 Length οf c2 24±2.3 20‾27 49±10.7 33‾66 37 32‾47 39±9.5 32‾50 Length οf d 29±3.6 24‾34 37±5.4 30‾45 21 19‾23 37±7.2 32‾45 Length οf e 10±1.2 9‾12 4±0.7 3‾5 brοken brοken 5±1.2 4‾6 Length οf f 46±2.4 43‾49 55±6.2 44‾64 28 26‾32 49±1.0 48‾50 Length οf h1 5±0.8 4‾6 4±0.5 3‾4 2 1‾2 3±0.6 3‾4 Number οf annuli befοre c1 10±0.5 10‾11 10±0.5 9‾ 11 10 9 ‾10 9±0.6 9‾10 Number οf annuli befοre c2 8±0.6 7‾9 9±0.8 8‾ 11 11 10 ‾12 9±0.6 9‾10 Number οf annuli between c2 and d 16±0.8 15‾17 15±0.9 14‾17 15 14‾16 13±1.0 12‾14 Number οf annuli between d and e 26±1.4 24‾28 26±1.7 24‾29 20 19‾22 23±2.1 21‾25 Number οf annuli between e and f 26±1.2 25‾28 26±1.2 25‾29 22 20‾24 25±1.7 23‾26 Number οf annuli between f and h 10±0.8 9‾11 13±0.8 11‾ 14 10 10 ‾11 11±0.6 11‾12 Number οf ventral annuli 86±2.4 82‾88 89±4.0 85‾97 79 76‾83 81±1.5 80‾83 Number οf dοrsal annuli 91±1.5 89‾93 93±2.2 90‾97 79 77‾82 84±1.5 83‾86 Internal genitalia typical for other Oziella spp, including triangular anterior genital apodeme, well-developed longitudinal bridge and spermathecal apparatus comprising pear-shaped large spermathecae and spermathecal tube with spherical distal swelling. Opisthosoma with 93 ventral and 88 dorsal annuli bearing ovoid or semispherical microtubercules. Setal lengths: c1 80, c2 25, d 24, e 9, f 43, h1 6; 11 annuli between rear shield margin and c1 tubercles, 8 annuli from rear prodorsal shield margin to c2; 16 annuli between c2 and d, 28 annuli between d and e, 25 annuli between e and f, 11 annuli between f and h1.

Host plant. Kobresia myosuroides (Villars) Fiori (Cyperaceae) .

Relation to the host plant. The mites were found living inside the leaf sheaths, causing no apparent damage.

Type material. Female holotype (slide #K-2-06/2) and 8 paratypes (6 females, 1 damaged male and 1 damaged nymph, all on slide #K-2-06/1) are deposited in the Acarological Collection of the Zoological Institute of Russian Academy of Sciences ( ZIN RAS). All specimens collected from RUSSIA: Kamchatka Peninsula, Mil’kovsky District, 1 km east to the settlement Atlasovo near Tolbachik volcanic complex ( Fig. 1 B), 22 August 2006, coll. P.G. Efimov.

Distribution. Oziella ovalis n. sp. is at present recorded from the Russian Far East (Kamchatka Peninsula). However, Kobresia myosuroides , the host of Oziella ovalis n. sp., is widely distributed in the temperate Northern Hemisphere (in Europe, North America and temperate Asia), so future surveys could reveal a wider distribution for this new mite species.

Etymology. The specific epithet, ovalis , is a feminine singular adjective referring to the contour of the epigynium of the new species: it is narrow; coverflap flange is remarkably rounded posteriorly so that the shape of epigynium is close to an ellipse in comparison to a more pointed (posteriorly) and thus subtriangular epigynium which is found in many other Oziella spp.

Differential diagnosis. The new species possess an uncommonly shaped posteriorly rounded epigynium, not recorded in other Oziella spp. Excluding this, O. ovalis n. sp. is close to Oziella liroi ( Roivainen 1947) . These two species differ in the ornamentation of the prodorsal shield, the number of empodial rays and the lengths of the prodorsal shield and epigynium ( Table 2 ).

Figures

FIGURE 1. Findings of Oziella virgata n. sp. (A, C, D) and Oziella ovalis n. sp. (B) in the Russian Far East. Note: This slightly cropped map shows the location of the Far Eastern Federal District of Russia (highlighted) based on: en. wikipedia. org / wiki / Russian _ Far _ East.

FIGURE 2. Semi-schematic drawings Oziella virgata n. sp. females (A – F) and Oziella ovalis n. sp. (G – L). Prodorsal shield (A, L), coxigenital area (B, K), Leg I (D, G), Leg II (C, H), empodium I (E, I), tarsal solenidion I (F, J). Scale bar: A = 25 µm; B = 20 µm; C, D, G, H = 30 µm; E, F, I, J = 10 µm; K = 30 µm; L = 25 µm. Notations: adm — admedian line; sm 1 – 5 — submedian lines 1 to 5 correspondingly.

FIGURE 3. CLSM images of Oziella ovalis n. sp. (female). A — prodorsal shield, B — coxigenital area, C — spermathecal apparatus. Scale bar = 15 µm.

FIGURE 4. Microphotographs of remounted Oziella ovalis n. sp. (female). A — whole mite (pseudo dark-field PC LM), B — empodium I (PC LM), C — coxigenital area (DIC LM), D — epigynium (DIC LM). Arrows in D indicate putative openings of spermathecal tubes. Scale bar: A = 30 µm, B = 4 µm, C = 20 µm, D = 5 µm.

Tables

TABLE 1. Measurements οf Ozie ̸̸ a oνa ̸ is n. sp. and Ozie ̸̸ a νirgata n. sp.

Width οf bοdy	65±2.6	63‾69	62±4.4	53‾69	57	54‾61	59±3.8	56‾63
Length οf prοdοrsal shield	28±1.2	26‾29	31±1.0	29‾32	26	25‾27	29±2.1	27‾31
Width οf prοdοrsal shield	47±2.7	43‾49	46±3.3	40‾50	37	36‾37	48±2.0	46‾50
Length οf gnathοsοma	21±1.2	20‾23	25±1.4	23‾27	21	19‾24	22±1.5	21‾24
Length οf d	10±2.3	7‾13	9±2.1	7‾13	7	7‾8	9±1.5	7‾10
Length οf νe	15±1.6	13‾17	14±2.0	12‾17	7	6‾8	11±0.6	11‾12
Distance between νe	26±1.7	24‾28	27±1.6	25‾30	25	24‾25	28±2.0	26‾30
Length οf sc	8±0.9	7‾9	2±0.3	1‾2	2	1.5‾2	2±0.6	2‾3
Distance between sc	20±1.3	18‾21	17±0.7	16‾18	16	15‾16	16±1.0	15‾17
Distance between νe and sc	18±0.6	17‾18	17±0.8	15‾18	15	14‾15	16±1.0	15‾17
Length οf leg I	28±1.2	26‾29	30±1.3	28‾32	22	21‾23	27±3.0	24‾30
Length οf em I	11±0.8	10‾12	11±1.2	9‾12	8	8‾8	10±0.6	9‾10
Length οf ω I	8±0.6	7‾9	8±0.5	8‾9	7	6‾7	8±0.6	8‾9
Length οf tibial sοlenidiοn φ	5±0.4	4‾5	6±0.6	5‾7	4	4‾5	6±0.6	6‾7
Length οf tibia I	7±0.8	6‾8	6±0.5	5‾7	5	4‾5	6±0.0	6‾6
Length οf ̸̛	2±0.4	1‾2	2±0.4	1‾2	1	1‾2	2±0.6	1‾2
Length οf tarsus I	5±0.5	4‾5	6±0.5	5‾6	4	4‾4	5±0.0	5‾5
Length οf leg II	26±0.9	25‾27	26±1.4	24‾29	20	20‾21	25±1.5	23‾26
Length οf em II	11±0.8	10‾12	10±0.8	9‾11	8	7‾8	10±0.6	9‾10
Length οf ω II	9±0.5	8‾9	8±0.3	8‾9	7	6‾7	8±1.0	7‾9
Length οf tibia II	6±0.5	5‾6	5±0.7	4‾6	4	4‾5	5±0.0	5‾5
Length οf tarsus II	5±0.5	4‾5	5±0.6	4‾6	4	4‾4	5±0.6	4‾5
Length οf 1b	10±1.7	8‾12	14±1.7	11‾16	9	7‾11	10±3.5	7‾12
Distance between 1b	15±0.8	14‾16	15±1.0	14‾17	14	13‾15	15±0.6	15‾16