Oribotritia chichijimensis Aoki, 1980

Liu, Dong, 2015, Review of Oribotritia (Acari, Oribatida, Oribotritiidae) with a world checklist and description of a new species from China, Zootaxa 4007 (2), pp. 217-241 : 223-226

Oribotritia chichijimensis Aoki, 1980

( Figs 4 A–I)

Measurements. Prodorsum: length 600–630, width 490–500, height 170–185, setae: ss 80, ro 135, in 110, le 90, ex 140, mutual distance: in–in 115, le–le 375, ro–ro 130; notogaster: length 1110–1150, width 895–908, height 868– 880; c 1 185, c 2 180, c 3 85, c p 150, d 1 185, d 2 180, e 1 165, e 2 160, h 1 135, h 2 125, h 3 100, ps 1 125, ps 2 150, ps 3 130, mutual distance: c 1– d 1 240, d 1– e 1 360, e 1– h 1 380, h 1– ps 1 330; genito-aggenital plate 255×145–270×160, ano-adanal plate 520×125–565×130.

Colour brown. Prodorsum with two pairs of lateral carinae, lower ones weaker and shorter; sensilli short, and thickened towards distal end; other prodorsal setae fine and smooth, rostral setae thickest and curved inward; comparative lengths: ex> ro> in> le> ss, in–in / ro–ro≈ 0.9. Notogastral setae short, similar in shape to interlamellar setae. Setae h of mentum longer than distance between them; setation of palps: 0-3-0-3-9(1); epimeral setal formula: 3-0-3-2. Eight pairs of minute genital setae present, including three pairs inserted on progenital area; two pairs of aggenital, two pairs of anal and three pairs of adanal setae present, all minute; anal setae situated anterior to adanal setae; lyrifissures iad placed at level of setae ad 3. Setal counts for leg segments: I: 1-4-5(2)-5(1)-21(3); II: 1- 4-4(1)-4(1)-19(2), III: 3-2-3(1)-4(1)-16, IV: 3-2-2(1)-3(1)-14; femora I without distal spines.

Material examined. ZMCAS: China: Fujian Province: 1 adult (in alcohol, Wu-Y-66), Chong’an County, Wuyigong, from bark and moss near tree root, 10 Aug. 1983, leg. Hui-Fu Wang and Xiao-Mei Zhang; 1 adult (in alcohol, Wu-Y-70), Chong’an County, Jiuqu, from leaves under bamboo forest, 10 Aug. 1983, leg. Hui-Fu Wang and Xiao-Mei Zhang; 1 adult (in alcohol, W-89-1), Wuyi Mt., Wuyigong, from leaves (bamboo, shrub and fern) under hillside, 23 Apr. 1989, leg. Hui-Fu Wang; 1 adult (in alcohol, W-89-48), Wuyi Mt., Yunwo, from leaves of Chinese fir root, 25 Apr. 1989, leg. Hui-Fu Wang. China: Hainan Province: 1 adult (in alcohol, H9404L2a), Jianfengling, from leaves, Apr. 1994, leg. Chong-Hui Liao.

Remarks. This species is distinct by the shape of sensilli and rostral setae (curved inward), the broader distance between rostral setae, and two pairs of anal setae. Compared with original description of paratype, the specimens from China differ by longer lower carinae of prodorsum (reaching beyond the middle of prodorsum versus not reaching in paratype), prodorsal setae longer (versus shorter), and setation of palps: 0-3-0-3-9(1) (versus 0-4-0-3-9(1)), epimeral setal formula: 3-0-3-2 (versus right formula: 3-0-3-2, left: 3-0-3-3).

Figures

FIGURE 4. Oribotritia chichijimensis Aoki, 1980: A, lateral view of body (legs removed); B, prodorsum, dorsal view; C, sensillus, dorsal view; D, right side of ano-genital region; E, mentum of infracapitulum; F – I, trochanter, femur, genu and tibia: F, leg I; G, leg II; H, leg III; I, leg IV. Scale bars: A, D F – I = 200 Μm; B = 100 Μm; C, E = 50 Μm.