Cunaxa setirostris ( Hermann, 1804 )

Heyer, Jacob Den & Sergeyenko, Alexey L., 2009, Neotype designation for Cunaxa setirostris (Hermann, 1804) (Acari: Prostigmata: Cunaxidae), Zootaxa 2106, pp. 61-68 : 63-67

Cunaxa setirostris ( Hermann, 1804)

Female ( Figs.1–9 ).

Gnathosoma ( Figs. 1–3 ). Apex of hypognathum reaches slightly beyond the distal margin of the palpal telofemur ( Fig. 1 ). Proximal cheliceral segment with numerous small papillae, second segment smooth, with some proximal dorsolateral papillae and prominent distal seta. The dorsal hypognathal coxal region has an area with papillae laterally to bases of chelicerae ( Fig. 2 ) but also covering its ventral surface with numerous papillae which distally to hg 4 become smaller and together with thin broken striae form a striped area directed towards hg 1. Hypognathum proximally with internal oval apodemes. Ventral surface of palpal segments smooth. Dorsal surface of basi-, telofemur and genu with sparse spine-like papillae ( Fig. 3 ). Palpal chaetotaxy: 0-1-1-3-5. Basifemur with one dorsal filiform seta. Telofemur with incrassate dorsal seta, apophysis cone-like with pointed apex, situated about halfway the length of the joint. Dorsal seta on genu incrassate, lateral seta filiform, ventromedial seta spine-like. There is a small (almost undrawable) sharp process near the spine-like seta on the tibiotarsus.

Idiosomal dorsum ( Fig. 4 ). Dorsal propodosomal plate with two pairs of sensillae (vi, sce) and two pairs of simple setae (ve, sci). Its surface is smooth and only near the bothridia some papillae are present. Setae sci longer than half of distance between their bases. Hysterosomal setae situated on small platelets. Setae c 1, c 2, d 1, e 1 smooth, f 1 and h 1 weakly barbed. Dorsal striae, smooth and only weakly papillated in the preanal region, distally to setae c 1, laterally to im and the bases of sce.

Idiosomal venter ( Fig. 5 ). Coxae clearly divided into four groups, viz. I & II and III & IV on either side; borders of coxal plates distinct. Striae around genital opening thin, papillated. Idiosomal venter apart from paracoxal and genital setae (g 1–4) with 3 pairs of hysterogastral setae and one pair of propodogastral, paragenital and anal setae each. Genital valves with thin broken striae. Setae g 4 situated more laterally to row of setae g 1–3 and little longer.

Legs ( Figs. 6–9 ). Leg chaetotaxy: coxae I–IV: 3 sts, 1 peg-1 sts-3 sts-2 sts; trochanters I–IV: 1-1-2-1 sts; femora I–IV: 7 sts-7 sts-3 sts/3 sts, 1 ms-1 sts/3 sts, 1 ms; genua I–IV: (1 asl, 1sts), 2 asl, 4 sts-1 asl, 5 sts-1 asl, 5 sts-1 asl, 5 sts; tibiae I–IV: (1 asl, 1 sts), 1 bsl, 4 sts-1 bsl, 5 sts-1 bsl, 5 sts-1T, 4; tarsi I–IV: (1 bsl, 1 peo, 1 sts), 3 bsl, 1 dtsl, 2 tsl, 23 sts-1 bsl, 1dtsl, 1 tsl, 25 sts-1 tsl, 26 sts-21 sts. Femora III and IV divided into basi- and telofemur; femora I and II undivided, but with ventral transverse constriction. Tarsi III and IV with distinct pretarsi. Ventral surface of femora I–IV with thin, short, broken transverse striae. Surfaces of other leg segments with numerous papillae which are dorsally relatively longer and more sparse than ventrally.

Measurements. Length of idiosoma 420 (333 – 436), width 280 (232 – 290). Length of hypognathum 185 (157 – 190), width 100 (87 – 104). Length of palps 220 (190 – 230). Length of chelicerae 170 (147 – 177). Length of legs: I 320 (280 – 328), II 283 (258 – 300), III 320 (293 – 330), IV 370 (314 – 413). Length of setae: hg 1 15 (14 – 16), hg 2 16 (15 – 17), hg 3 35 (30 – 36), hg 4 20 (17 – 22), ve 11 (10 – 12), sci 29 (23 – 29), c 1 34 (26 – 35), c 2 26 (20 – 28), d 1 32 (24 – 33), e 1 33 (24 – 34), f 1 45 (35 – 47), h 1 46 (35 – 47), g 1-4 13 – 19 (10 – 19). Distance between setae: sci -sci 45 (33 – 46), sci -ve 40 (37 – 42).

Male ( Figs. 10–17 ).

Differs from female by smaller size and following characters: surface of second cheliceral segment and dorsal surface of palpal coxae smooth ( Fig. 10 ), ventral surface of hypognathum basally smooth and only near setae hg 4 papillae form wide transverse area from which is directed a band of papillae and broken striae towards hg 1 ( Fig. 11 ). Apophysis of palpal telofemur shorter and thinner. Length of sci smaller or rarely equals half the distence between their bases. Dorsal hysterosomal plate present, bearing smooth setae c 1, c 2, d 1 and e 1. Setae f 1 and h 1 relatively short, stout, barbed ( Fig. 12 ). Both setae f 1 situated on one plate, which weakly separated from main hysterosomal plate. Setae h 1 situated on platelets which may join into one plate. All dorsal plates smooth and only propodosomal plate near bothridia with some papillae. Only 2 pairs of hysterogasral setae present ( Fig. 13 ). Differences in leg chaetotaxy (chaetotaxy of female in parentheses): basifemur IV 0 (1); number of solenidia on genua I–II 4-2 (3-1); number of simple setae on tarsi I–IV 20-21- 22 -17 (24-25-26-21) ( Figs. 14–17 ).

Measurements. Length of idiosoma 260 – 290; width 200 – 215. Length of hypognathum 110 – 133; width 60 – 71. Length of palps 150 – 168; Length of chelicerae 115 – 130. Length of legs: I 262 – 280, II 230 – 250, III 265 – 278, IV 283 – 290. Length of setae: hg 4 15 – 18, hg 3 25 – 30, hg 2 14 – 17, hg 1 14 – 16, ve 8 – 10, sci 12 – 18, c 1 20 – 24, c 2 14 – 16, d 1 19 – 23, e 1 18 – 23, f 1 20 – 24, h 1 20 – 23, g 1-4 12 – 15. Distance between setae: sci -sci 35 – 45, sci -ve 29 – 33, ve -ve 81 – 85, c 1- c 1 50 – 58, c 1- c 2 40 – 45, d 1- d 1 45 – 53, d 1- c 2 35 – 42, e 1- e 1 42 – 44, f 1- f 1 25 – 35, h 1- h 1 19 – 24.

Immatures unknown.

Material studied. Ƥ Neotype, Ukraine, Transcarpathian region, vicinity of Sinevir lake, in moss, 29.VII.2007 (Coll. Khaustov, A.A.). Additional material 2 Ƥ, 1 3, Ukraine, Transcarpathian region, vicinity of Sinevir lake, in moss, 29.VII.2007 (Coll. Khaustov, A.A.). 1 Ƥ Ukraine, Crimea, Krasnogvardeyskoe reg., vicinity of settl. Aleksandrovka, in sod, 11.X.2002 (Coll. Sergeyenko, A.L.). 2 ƤƤ, Ukraine, Crimea, Karadagskiy Nature Reserve, in cereal sod, 10.VI.2008 (Coll. Sergeyenko, A.L.). 1 Ƥ, in the same place, motley grass, 20.V.2007 (Coll. Sergeyenko, A.L.). 1 Ƥ, in the same place, in litter under the oak Quercus pubescens , 20.V.2007 (Coll. Sergeyenko, A.L.). 17 ƤƤ, 4 33, in the same place, in litter under Pistacia mutica , 18.VI.2002 (Coll. Sergeyenko, A.L.). 1 Ƥ, Ukraine, Crimea, Kazantip cape, steppe, in sod, 4.VII.2008 (Coll. Sadogurskiy, S.Е). 6 ƤƤ, Ukraine, Crimea, Kanaka, moss on Juniperus exelsa , 20.V.2002 (Coll. Sergeyenko, A.L.). 1 Ƥ, Ukraine, Crimea, Bahchisarayskiy reg, vicinity. of settl. Mashino moss on Carpinus orientalis , 2.VI.2002 (Coll. Sergeyenko, A.L.). 1 Ƥ, Ukraine, Crimea, Nikita mountain pasture, in old anthill Formica pratensis , 10.XI.2002 (Coll. Khaustov, A.A.). 2 ƤƤ, Ukraine, Crimea, Pervomayskiy reg, vicinity of settl. Grishino, forest shelter-belt of Gleditschia triacanthos , in soil, 15.IX.2002 (Coll. Sergeyenko, A.L.).

1 Ƥ, Ukraine, Crimea, Sudakskiy reg, vicinity of settl. Uyutnoye, in litter under Juniperus exelsa , 30.VII.2002 (Coll. Khaustov, A.A.). 1 Ƥ, Ukraine, Crimea, North-Demerdzhi mount., in sod, 9.III.2002 (Coll. Sergeyenko, A.L.). 1 Ƥ, Ukraine, Crimea, Simferopolskiy reg., vicinity of settl. Gvardeyskoe, in soil under Armeniaca vulgaris , 15.IX.2002 (Coll. Sergeyenko, A.L.). 9 ƤƤ, Ukraine, Crimea, Sakskiy reg, vicinity of Yevpatoria, shore of Maynakskoye lake, in litter under Elaeagnus argentea , 25.II.2001 (Coll. Sergeyenko, A.L.).

Location of material. Ƥ Neotype, 6 ƤƤ, 1 3 in the collection of the Schmalhausen Institute of Zoology of National Academy of Science of Ukraine (Kiev, Ukraine). 10 ƤƤ, 2 3 3 in the Zoological Institute of the Russian Academy of Science (St.-Petersburg, Russia). Other specimens in the collection of the Nikita Botanical Gardens–National Scientific Center (Yalta, Crimea, Ukraine). A number of specimens will also be deposited in the National Collection of Arachnida, Plant Protection Research Institute, Pretoria, South Africa as well as in the Mite Collection of the Natural History Museum, London, England.

Figures

FIGURES 1 – 5. Cunaxa setirostris (Hermann). Female. Gnathosoma, ventral aspect (1), base of gnathosoma, dorsolateral aspect (2); palp (3); idiosomal dorsum (4); idiosomal venter (5). Scale-bar: 1 – 3 — 50 μm; 4, 5 — 100 μm.

FIGURES 6 – 9. Cunaxa setirostris (Hermann). Female. Genu, tibia and tarsus of: leg I (6), leg II (7), leg III (8), leg IV (9). Scale-bar— 50 μm.

FIGURES 10 – 13. Cunaxa setirostris (Hermann). Male. Base of gnathosoma, dorsolateral aspect (10); gnathosoma, ventral aspect (11); idiosomal dorsum (12); idiosomal venter (13). Scale-bar: 10, 11 – 50 μm; 12, 13 – 100 μm.

FIGURES 14 – 17. Cunaxa setirostris (Hermann). Male. Genu, tibia and tarsus of: leg I (14), leg II (15), leg III (16), leg IV (17). Scale-bar— 50 μm.