Acaphyllisa tuberculumae, 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 : 48-51

Acaphyllisa tuberculumae sp. n. Figures 1-3

Description.

Female. (n = 8) Body fusiform, light yellow, 171 (171-195), 72 (70-75) wide. Gnathosoma 21 (20-21), projecting obliquely down, suboral plate present, p edipalp coxal seta (ep) 4 (4-5), dorsal pedipalp genual seta (d) 7 (7-8), cheliceral stylets 16 (16-18). Prodorsal shield 49 (45-49), 53 (53-60) wide, subtriangular; frontal lobe 6 (5-8); median, admedian and submedian lines present, median line ending at basal 1/2 of prodorsal shield, admedian lines connected at basal 1/2 and 2/3 of prodorsal shield, forming three cells on each side of the median line. Scapular tubercles ahead of rear shield margin, 2 (2-3), 18 (18-19) apart, scapular setae (sc) 8 (6-8), projecting centrad. Coxigenital region with 10 smooth annuli. Coxisternal plates with granules, anterolateral setae on coxisternum I (1b) 7 (7-8), 14 (14-15) apart, proximal setae on coxisternum I (1a) 19 (19-21), 11 (10-11) apart, proximal setae on coxisternum II (2a) 51 (51-53), 26 (26-28) apart, tubercles 1b and 1a 8 (8-9) apart, tubercles 1a and 2a 8 (8-9) apart. Prosternal apodeme combined, 7 (6-7). Leg I 36 (35-36), femur 10 (9-10), basiventral femoral seta (bv) 8 (8-10); genu 5 (5-6), antaxial genual seta (l") 29 (29-31); tibia 8 (7-8), paraxial tibial seta ( l’) 7 (7-8), located at 1/4 from dorsal base; tarsus 8 (7-8), seta ft’ 17 (17-19), seta ft" 22 (22-23), seta u’ 5 (5-6); tarsal empodium (em) 6 (6-7), divided, 2-rayed on each side, tarsal solenidion (ω) 7 (6-7), knobbed. Leg II 28 (28-33), femur 10 (9-10), basiventral femoral seta (bv) 10 (9-10); genu 5 (4-5), antaxial genual seta (l") 6 (6-8); tibia 6 (6-7); tarsus 7 (6-7), seta ft’ 5 (5-7), seta ft" 21 (21-22), seta u’ 5 (5-6); tarsal empodium (em) 6 (5-6), divided, 2-rayed on each side, tarsal solenidion (ω) 6 (6-7), knobbed. Opisthosoma dorsally with 55 (55-57) annuli, with round microtubercles, ventrally with 77 (74-77) annuli, with round microtubercles. Setae c2 31 (28-31) on ventral annulus 14 (14-16), 56 (54-56) apart; setae d 55 (55-60) on ventral annulus 34 (33-34), 38 (33-38) apart; setae e 17 (16-17) on ventral annulus 52 (52-53), 20 (18-20) apart; setae f 28 (25-28) on ventral annulus 71 (69-71), 26 (25-26) apart. Setae h1 2 (2-3), h2 70 (70-75). Female genitalia 18 (17-18), 24 (24-25) wide, coverflap smooth, setae 3a 33 (33-35), 14 (14-15) apart.

Male. (n = 1) Body fusiform, light yellow, 150, 57 wide. Gnathosoma 17, projecting obliquely down, suboral plate present, pedipalp coxal seta (ep) 5, dorsal pedipalp genual seta (d) 5, cheliceral stylets 13. Prodorsal shield has the same design as female, 44, 48 wide, subtriangular; frontal lobe 5. Scapular tubercles ahead of rear shield margin, 3, 18 apart, scapular setae (sc) 6, projecting centrad. Coxigenital region with 10 smooth annuli. Coxisternal plates with granules, anterolateral setae on coxisternum I (1b) 7, 12 apart, proximal setae on coxisternum I (1a) 18, 10 apart, proximal setae on coxisternum II (2a) 45, 23 apart, tubercles 1b and 1a 7 apart, tubercles 1a and 2a 7 apart. Prosternal apodeme combined, 5. Legs with usual series of setae. Leg I 29, femur 9, basiventral femoral seta (bv) 8; genu 5, antaxial genual seta (l") 31; tibia 7, paraxial tibial seta ( l’) 6, located at 1/4 from dorsal base; tarsus 6, seta ft’ 17), seta ft" 18, seta u’ 4; tarsal empodium (em) 6, divided, 2-rayed on each side, tarsal solenidion (ω) 6, knobbed. Leg II 28, femur 10, basiventral femoral seta (bv) 8; genu 4, antaxial genual seta (l") 8; tibia 6; tarsus 6, seta ft’ 5, seta ft" 18, seta u’ 4; tarsal empodium (em) 5, divided, 2-rayed on each side, tarsal solenidion (ω) 6, knobbed. Opisthosoma dorsally with 51 annuli, with round microtubercles, ventrally with 66 annuli, with round microtubercles. Setae c2 21 on ventral annulus 12, 42 apart; setae d 42 on ventral annulus 27, 28 apart; setae e 16 on ventral annulus 43, 16 apart; setae f 25 on ventral annulus 61, 21 apart. Setae h1 2, h2 60. Male genitalia forming a “Y” like structure in the middle, 19 wide, setae 3a 22, 15 apar t.

Type material.

Holotype, female (slide number NJAUEri789B, marked Holotype), from Populus sp. ( Salicaceae ), Xining City, Qinghai Province, P. R. China, 36°38'18"N, 101°45'27"E, elevation 2241m, 21 July 2007, coll. Xiao-Feng Xue. Paratypes, 7 females and 1 male (slide number NJAUEri789B), with the same data as holotype.

Relation to host.

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

Etymology.

The specific designation tuberculumae is from the character of dorsal opisthosomal microtubercles, “tuberculum” in Latin; masculine in gender.

Differential diagnosis.

This species is similar to Acaphyllisa populi Xue & Hong, 2006, but can be differentiated from the latter by prodorsal shield with six cells in the middle (prodorsal shield without cells in Acaphyllisa populi ), opisthosoma dorsally with round microtubercles (opisthosoma dorsally with elliptical microtubercles only on ridges in Acaphyllisa populi ), female genitalia coverflap smooth (female genital coverflap with 10 longitudinal ridges in Acaphyllisa populi ).