Tetra pyriana, Li, Hao-Sen, Xue, Xiao-Feng & Hong, Xiao-Yue, 2012

Li, Hao-Sen, Xue, Xiao-Feng & Hong, Xiao-Yue, 2012, Eriophyoid mites from Qinghai Province, northwestern China with descriptions of nine new species (Acari, Eriophyoidea), ZooKeys 196, pp. 47-107 : 61

Tetra pyriana sp. n. Figures 19-22

Description.

Female. (n = 11) Body fusiform, light yellow, 180 (169-185), 73 (72-76) wide, 65 (64-65) thick. Gnathosoma 20 (20-23), projecting obliquely down, pedipalp coxal seta (ep) 4 (3-4), dorsal pedipalp genual seta (d) 6 (5-7), cheliceral stylets 20 (20-21). Prodorsal shield 47 (47-49), 68 (68-72) wide, subtriangular; frontal lobe 12 (11-13); median, admedian and submedian lines present, median line obscure and ending at basal 1/3 of prodorsal shield. Scapular tubercles on rear shield margin, 4 (3-4), 36 (33-36) apart, scapular setae (sc) 12 (12-13), projecting posteriorly. Coxigenital region with 13 (12-13) smooth annuli. Coxisternal plates with short lines, anterolateral setae on coxisternum I (1b) 7 (7-9), 12 (11-12) apart, proximal setae on coxisternum I (1a) 21 (20-21), 10 (9-10) apart, proximal setae on coxisternum II (2a) 40 (40-45), 27 (25-27) apart, tubercles 1b and 1a 6 (6-7) apart, tubercles 1a and 2a 10 (9-10) apart. Prosternal apodeme combined, 7 (6-7). Leg I 32 (30-32), femur 12 (11-12), basiventral femoral seta (bv) 11 (10-11); genu 6 (5-6), antaxial genual seta (l") 20 (20-21); tibia 7 (7-8), paraxial tibial seta ( l’) 5 (5-6), located at 1/3 from dorsal base; tarsus 8 (7-8), seta ft’ 19 (17-19), seta ft" 25 (21-25), seta u’ 5 (4-5); tarsal empodium (em) 6 (6-7), simple, 4-rayed, tarsal solenidion (ω) 6 (6-7), knobbed. Leg II 28 (27-28), femur 11 (10-11), basiventral femoral seta (bv) 8 (8-11); genu 5 (4-5), antaxial genual seta (l") 8 (7-8); tibia 7 (6-7); tarsus 7 (6-7), seta ft’ 5 (5-6), seta ft" 20 (19-20), seta u’ 4 (4-5); tarsal empodium (em) 6 (6-7), simple, 4-rayed, tarsal solenidion (ω) 5 (5-6), knobbed. Opisthosoma dorsally with 32 (30-32) annuli, with filamentous microtubercles, ventrally with 58 (58-60) annuli, with round microtubercles. Setae c2 25 (24-30) on ventral annulus 11 (11-13), 57 (54-57) apart; setae d 45 (45-50) on ventral annulus 22 (22-24), 32 (32-33) apart; setae e 18 (17-18) on ventral annulus 37 (37-41), 17 (16-17) apart; setae f 29 (28-30) on ventral annulus 53 (53-54), 25 (24-25) apart. Setae h1 3 (2-3), h2 85 (80-90). Female genitalia 15 (14-16), 22 (22-23) wide, coverflap with 11 (10-12) longitudinal ridges, setae 3a 22 (19-24), 14 (14-15) apart.

Male. (n = 2) Body fusiform, light yellow, 150-176 63-65 wide. Gnathosoma 21-22, projecting obliquely down, pedipalp coxal seta (ep) 2-3, dorsal pedipalp genual seta (d) 6-7, cheliceral stylets 19-20. Prodorsal shield has the same design as female, 42-47, 63-65 wide, subtriangular; frontal lobe 10-11. Scapular tubercles on rear shield margin, 3-4, 30-31 apart, scapular setae (sc) 11-13, projecting posteriorly. Coxigenital region with 12-13 smooth annuli. Coxisternal plates with short lines, anterolateral setae on coxisternum I (1b) 7-8, 12-13 apart, proximal setae on coxisternum I (1a) 18-20, 9-10 apart, proximal setae on coxisternum II (2a) 45-46, 24-26 apart, tubercles 1b and 1a 6-7 apart, tubercles 1a and 2a 7-9 apart. Prosternal apodeme combined, 5-6. Leg I 29-32, femur 7-9, basiventral femoral seta (bv) 9-12; genu 5-6, antaxial genual seta (l") 20-23; tibia 6-8, paraxial tibial seta ( l’) 5-6, located at 1/3 from dorsal base; tarsus 7-8, seta ft’ 17-18, seta ft" 21-23, seta u’ 3-4; tarsal empodium (em) 6-7, simple, 4-rayed, tarsal solenidion (ω) 5-6, knobbed. Leg II 25-27, femur 7-9, basiventral femoral seta (bv) 9-10; genu 4-5, antaxial genual seta (l") 6-8; tibia 7-8; tarsus 6-7, seta ft’ 2-3, seta ft" 20-21, seta u’ 2-3; tarsal empodium (em) 6-7, simple, 4-rayed, tarsal solenidion (ω) 6-7, knobbed. Opisthosoma dorsally with 29-31 annuli, with filamentous microtubercles, ventrally with 60-61 annuli, with round microtubercles. Setae c2 24-25 on ventral annulus 13-14, 50-51 apart; setae d 36-37 on ventral annulus 24-25, 29-30 apart; setae e 15-16 on ventral annulus 41-42, 16-17 apart; setae f 28-29 on ventral annulus 55-56, 20-21 apart. Setae h1 2-3, h2 85-90. Male genitalia 13-14, 19-20 wide, setae 3a 17-18, 16-17 apart.

Type material.

Holotype, female (slide number NJAUEri796, marked Holotype), from Pyrus calleryana Decne. ( Rosaceae ), Xining, Qinghai Province, P. R. China, 36°38'18"N, 101°45'27"E, elevation 2241m, 21 July 2007, coll. Xiao-Feng Xue. Paratypes, 10 females and 2 males (slide number NJAUEri796), with the same data as holotype.

Additional material.

13 females (slide number NJAUEri807), from Pyrus betulifolia Bunge. ( Rosaceae ), Xining, Qinghai Province, P. R. China, 36°38'18"N, 101°45'27"E, elevation 2241m, 21 July 2007, coll. Xiao-Feng Xue; 14 females and 1 male (slide number NJAUEri806), from Pyrus calleryana Decne. ( Rosaceae ), Xining, Qinghai Province, P. R. China, 36°38'18"N, 101°45'27"E, elevation 2241m, 21 July 2007, coll. Xiao-Feng Xue.

Relation to host.

Vagrant on leaf lower surface. No damage to the host was observed.

Etymology.

The specific designation pyriana is from the generic name of host plant, Pyrus ; feminine in gender.

Differential diagnosis.

This species is similar to Tetra pinnatifidae Xue, Song & Hong, 2006a, but can be differentiated from the latter by median line weak and ending at basal 1/3 of prodorsal shield (median normal and does not disappear at basal 1/3 of prodorsal shield in Tetra pinnatifidae ), coxigenital region with smooth annuli (coxigenital region annuli with round microtubercles in Tetra pinnatifidae ).