Aculus sayanicus Skoracka & Pacyna, 2003, n. sp.
Aculus sayanicus n. sp. Skoracka DIAGNOSIS: anterior lobe of prodorsal shield with three spines, typical prodorsal shield design of distinct lines bearing conical microtubercles, 89 rayed empodium, long, thin and tapered solenidion. FEMALE (Figs 12) (holotype and 8 paratypes): Body spindleform. B...
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Zenodo
2003
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Online Access: | https://dx.doi.org/10.5281/zenodo.6276896 https://zenodo.org/record/6276896 |
Summary: | Aculus sayanicus n. sp. Skoracka DIAGNOSIS: anterior lobe of prodorsal shield with three spines, typical prodorsal shield design of distinct lines bearing conical microtubercles, 89 rayed empodium, long, thin and tapered solenidion. FEMALE (Figs 12) (holotype and 8 paratypes): Body spindleform. Body length 170 (183235); width 60 (5264). Gnathosoma 22 (2023) long; dorsal pedipalpal genual seta d 14 (1115) long; v seta (sensory peg) 2 (2) long; ep seta 3 (3); cheliceral stylets 21 (2123) long. Prodorsal shield triangular, with rounded frontal lobe over base of chelicerae, lobe with three small spines projecting forward from under front edge. Prodorsal shield 43 (4548) long, 46 (4348) wide. Shield design of distinct lines, most of them bearing conical microtubercles: median line on rear ½; admedian lines entire, from anterior lobe diverging to rear margin; I submedian lines subparallel to admedian on rear ½, not reaching rear margin; II submedian lines from anterior ¼ running toward outer tubercles of sc setae, subparallel to lateral margin of shield. Tubercles of setae sc located on rear margin of shield, 4 (45) long, 4 (45) wide, 29 (28 35) apart. Setae sc 59 (4857) long, projecting to rear. Leg I 46 (4547) long; femur 13 (1213) long, with seta bv 21 (1822) long; position of seta bv 6 (56) from ventral, proximal margin of femur; genu 8 (78) long, with seta l” 40 (3338) long, position of seta l” 4 (4) from dorsal, proximal margin of genu; tibia 11 (1112) long, with seta l’ 14 (1419) long; position of seta l’ 6 (67) from ventral, proximal margin of tibia. Tarsus 10 (910) long, with three setae: ft” 30 (2736), ft’ 30 (2730) long, u’ 11 (812) long; tarsal solenidion 14 (1214) long; tarsal empodium simple, 9 (89) rayed, symmetrical, 15 (1315) long. Leg II 45 (4246) long; femur 13 (13) long, with seta bv 30 (3034) long; position of seta bv 6 (56) from ventral, proximal margin of femur; genu 7 (67) long, with seta l” 24 (1924) long; position of seta l” 4 (34) from dorsal, proximal margin of genu; tibia 9 (910) long. Tarsus 9 (810) long, with three setae: ft” 32 (28 33) long, ft’ 19 (1419), u’ 10 (1011) long; tarsal solenidion 14 (1214) long, thin and tapered; tarsal empodium 8 (8)rayed, symmetrical, 15 (1415) long. Coxae with irregular pattern of numerous dashes and microtubercles; slender sternal line present. Setae 1 b 10 (1012) apart, (1519) long; setae 1a 8 (89) apart, 44 (45) long; setae 2a 22 (2326) apart, 67 (57) long; distance between setae 1 b and 1a 10 (910), distance between setae 1 a and 2a 8 (9). Opisthosoma with 52 (4564) dorsal annuli, 66 (5874) ventral annuli, 7 (68) coxogenital annuli. Annuli with microtubercles; dorsal microtubercles beadlike, situated under folds of annuli and almost invisible on 2 / 3 anterior part of opisthosoma; ventral microtubercles rounded, located on annuli margin. Seta c 2 57 (4851) long, located on 9 th (8 th 10 th) ventral annulus from coxae II; tubercles c 2 51 (4254) apart; ventral seta d 72 (5786) long, located on 21 st (21 st 24 th) ventral annulus; tubercles d 36 (3238) apart; seta e 45 (4353) long, located on 38 th (34 th 44 th) ventral annulus; tubercles e 16 (1517) apart; seta f 42 (3843) long, located on 62 nd (58 th 70 th) ventral annulus, or 5 th (5 th) annulus from rear; tubercles f 26 (2127) apart. Setae h 1 6 (56) long, 6 (67) apart; setae h 2 105 (7686) long, 10 (1011) apart; distance between h 1 and h 2 2 (2). Genital parts 12 (1113) long, 23 (2124) wide, genital coverflap with 15 (1015) longitudinal striae; setae 3a 64 (5779) long, 17 (1516) apart. MALE (Fig 3) (3 specimens): body length 141200; body width 4957, spindleform. Gnathosoma 2024 long; dorsal pedipalpal genual seta d 1011 long; v seta (sensory peg) 2 long; ep seta 3 long; chelicerae 2021 long. Prodorsal shield shape and design similar to that of a female, except the anterior lobe bearing two small spines projecting forward from under front edge. Shield 3943 long; 4055 wide. Tubercles of setae sc located on rear margin of shield, 4 long, 4 wide, 2935 apart; setae sc 3340 long, projecting to rear. Leg I 38 43 long; femur 10 long, with seta bv 1617 long; position of seta bv 5 from ventral, proximal margin of femur; genu 6 long, with seta l” 2730 long; position of seta l” 34 from dorsal, proximal margin of genu; tibia 910 long, with seta l’ 1112 long; position of seta l’ 5 from ventral, proximal margin of tibia. Tarsus 89 long, with three setae: ft” 27 long, ft’ 23 long, u’ 68 long; tarsal solenidion 1011 long; tarsal empodium simple, 7 rayed, symmetrical, 1112 long. Leg II 36 38 long; femur 10 long, with seta bv 25 28 long; position of seta bv 46 from ventral proximal margin of femur; genu 56 long, with seta l” 18 long; position of seta l” 34 from dorsal, proximal margin of genu; tibia 8 long. Tarsus 89 long, with three setae: ft” 28 long, ft’ 13 long, u’ 7 long; tarsal solenidion 1112 long; tarsal empodium 7 rayed, symmetrical, 1213 long. Coxae with a pattern of dashes. Setae 1 b 1011 apart, 15 long; setae 1a 7 9 apart, 24 long; setae 2a 21 24 apart, 46 long; distance between setae 1 b and 1a 7 8, distance between setae 1 a and 2a 8 9. Opisthosoma with 5558 dorsal annuli, 6063 ventral annuli, 5 coxogenital annuli. Annuli with microtubercles; dorsal microtubercles tiny and conical, set along annuli margins; ventral microtubercles larger than dorsal ones, conical, pointed, not ahead or slightly ahead of annuli margins. Figure 3 : Aculus sayanicus n. sp. male: TP prodorsal shield; GM coxigenital region; DO dorsal microtubercles. Seta c 2 5253 long, located on 9 th ventral annulus from coxae II; tubercles c 2 4250 apart; ventral seta d 5762 long, located on 18 th 20 th ventral annulus; tubercles d 2939 apart; seta e 43 long, located on 32 nd 36 th ventral annulus; tubercles e 1418 apart; seta f 3336 long, located on 56 th 59 th ventral annulus, or 5 th annulus from rear; tubercles f 2326 apart. Setae h 1 45 long, 6 apart; setae h 2 810 apart; distance between h 1 and h 2 2. Genital parts 1415 long, 2023 wide; setae 3a 29 34 long, 1519 apart; surface near the genital parts with triangular microtubercles. NYMPH (Fig 4) (2 specimens): body length 181209; body width 48; vermiform. Gnathosoma 19 long; dorsal pedipalpal genual seta d 11 long; chelicerae 19. Shape and design of prodorsal shield similar to that of a female, with some exceptions: there are no microtubercles on shield, anterior lobe without spines. Shield 4043 long, 44 wide. Tubercles of setae sc 3 long, 4 wide, located on rear margin of shield, 2526 apart; seta sc 2326 long. Leg I 30 long; femur 7 long, with seta bv 14 long; position of seta bv 4 from ventral, proximal margin of femur; genu 5 long, with seta l ” 28 long; position of seta l” 3 from dorsal, proximal margin of genu; tibia 5 long, with seta l’ 10 long; position of seta l’ 4 from ventral, proximal margin of tibia, tarsus 6 long. Tarsal solenidion 9 long; tarsal empodium simple, 7 rayed, symmetrical, 910 long. Leg II 27 long; femur 8 long, with seta bv 14 long; position of seta bv 4 from ventral, proximal margin of femur; genu 4 long, with seta l” 13 long; position of seta l” 3 from dorsal, proximal margin of genu; tibia 6 long. Tarsus 7 long, with three setae: ft” 21 long, ft’ 13 long, u’ 7 long; tarsal solenidion 9 long; tarsal empodium 7 rayed, symmetrical, 9 long. Coxae with a pattern of dashes and microtubercles. Setae 1 b 710 apart; setae 1a 9 10 apart; setae 2a 21 23 apart, 38 long; distance between setae 1 b and 1a 7 8, distance between setae 1 a and 2a 7 8. Opisthosoma with 5457 dorsal annuli, 5354 ventral annuli, 78 coxogenital annuli. Annuli with microtubercles; dorsal microtubercles tiny, conical with blunt top, set along annuli margins; ventral microtubercles conical, larger than dorsal ones, slightly ahead of annuli margins. Seta c 2 37 long, located on 9 th 10 th ventral annulus from coxae II; tubercles c 2 43 apart; ventral seta d 40 long, located on 19 th 21 st ventral annulus; tubercles d 29 apart; seta e located on 3132 ventral annulus; tubercles e 1114 apart; seta f 26 long, located on 49 th 50 th ventral annulus, or 5 th annulus from rear; tubercles f 1824 apart. Setae h 1 5 apart; setae h 2 8 apart; distance between h 1 and h 2 2. Setae 3a 13 14 long, 89 apart. LARVA: not seen. TYPE MATERIAL: holotype female, 10 female paratypes, 5 males, 2 nymphs collected from Poa sibirica Roshev. (Poaceae), in Russia, southwest part of Republic of Buryatia, Eastern Sayan Mountains, Tunka Valley, 7.2 km from Arshan locality (51 º 59 ’N, 102 º 24 ’E), elevation 1800 m., taiga; 8.09.2001; leg. A. Skoracka. This species was also found on the same host in Sayan Mountains, near Kitoy river (52 º03’N, 102 º 23 ’E), elevation 864 m., taiga; 12.09.2001; leg. A. Skoracka. RELATION TO HOST PLANT: mites are vagrants on upper leaf surfaces. ETYMOLOGY: the specific name is derived from the name of the Mountains where this mite was found + icus , Greek, meaning pertaining to. REMARKS: 1) A. sayanicus is the second species of the genus Aculus described from grasses. It differs from A. bambusae Kuang, 1991 (from Bambusa sp., China) by prodorsal shield design and prodorsal lobe shape. In A. sayanicus the median line is incomplete and there is no transverse line; the prodorsal lobe bears three spines. In A. bambusae the median line is complete and there is a transverse line joining admedian lines; the prodorsal lobe bears two spines. In addition, the two species differ in the number of I empodial rays (9 in A. sayanicus , 7 in A. bambusae ), number of dorsal annuli (52 in A. sayanicus , 37 in A. bambusae ) and length of setae: sc (4857 A. sayanicus , 30 in A. bambusae ), 3 a (5779 in A. sayanicus , 22 in A. bambusae ), c 2 (4851 in A. sayanicus , 20 in A. bambusae ). 2) The other species collected in Eastern Sayan Mountains is Abacarus acutatus Sukhareva. It was found on Calamagrostis purpurea (Trin.) subsp. langsdorfii (Link) Tzvel. ( C. langsdorffi (Link) Trin.) in Tunka Valley, 3.3 km from Arshan locality (51 º 57 ’N, 102 º 25 ’E), elevation 1100 m, taiga; 7.09. 2001. This species was described from Calamagrostis epigeios (L.) Roth in Russia (Sukhareva 1985), and was also recorded from C. arundinacea (L.) Roth in Poland (Skoracka 2000). C. purpurea is a new host plant for this eriophyoid mite. : Published as part of Skoracka, Anna & Pacyna, Anna, 2003, Aculus sayanicus, a new species of Eriophyidae (Acari: Eriophyoidea) from grasses in Russia, pp. 1-10 in Zootaxa 149 on pages 2-9, DOI: 10.5281/zenodo.156185 : {"references": ["Kuang, H. - Y. (1991) Three new species of Phyllocoptinae from China (Acariformes: Eriophyidae), Acta Entomologica Sinica, 34 (1), 99 - 102.", "Sukhareva, S. I. (1985) New species of mites (Acarina: Tetrapodili) on grasses from Primorskij Kraj. (Maritime Territory), Entomologicheskoe Obozrenie, 64 (1), 227 - 234.", "Skoracka, A. (2000) Occurrence and feeding preferences of eriophyoid mites on grasses in Poland. In: Ignatowicz S. (Ed.) Proceedings of XXVI Acarology Symposium in Poland, SGGW, Warsaw, pp. 333 - 339."]} |
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