Mesotritia okuyamai Aoki, 1980

Liu, Dong & Chen, Jun, 2010, A review of Mesotritia (Acari: Oribatida: Oribotritiidae) in China, with descriptions of two new species and a checklist of known taxa, Zootaxa 2479, pp. 39-58 : 56

Mesotritia okuyamai Aoki, 1980

( Figs. 51–58 )

Mesotritia okuyamai Aoki, 1980 , p. 74, fig. 28; Niedbała, 2000, p. 95, figs. 237–247.

Material examined: China: Fujian Province, Jiangle County, Longqi Mt. (26°43'42.90"N, 117°28'18.51"E): one adult (in alcohol, W-90-75), Qingshanao, from litter under conifer, 900M, 12 Sep., 1990, leg. Hui-Fu Wang; one adult (in alcohol, W-90-78), same data as W-90-75, 1000M; three adults (in alcohol, W-90-80), Xianrentang, from litter under shaw, 1300M, 13 Sep., 1990, leg. Hui-Fu Wang; one adult (in alcohol, W-90- 82), Shejiaping, from litter under conifer, 21 Sep., 1990, leg. Hui-Fu Wang; one adult (in alcohol, W-90-87), Shaxizi, from litter under shaw, 19 Sep., 1990, leg. Hui-Fu Wang; one adult (in alcohol, W-91-6), from litter, 26 Jun., 1991, leg. Xiao-Mei Zhang. China: Fujian Province, Fuzhou City (26° 4'33.98"N, 119°18'23.06"E): two adults (in alcohol, W-93-18), from litter, 29, Mar., 1991, leg. Fu-Sheng Huang; 130 adults (in alcohol, CJ- 05-83), Xihu Hotel, from litter, 30, Oct., 2005, leg. Jun Chen. Newly recorded from China.

Measurements: Specimens (n=5) from Fujian Provinces: Prodorsum: length 370–420, width 250–310, height 130–160, setae: ss 65, ro 140, in 60, le 140, ex 60, distance between setae: ro -ro 55, in -in 155, le -le 220; notogaster: length 650–790, width 440–560, height 485–620; setae: c1 95, c2 55, c3 50, c p 55, d1 75, d2 70, e1 75, e2 75, h1 75, h2 80, h3 50, ps1 75, ps2 65, ps3 50; distance between setae: c1-d1 180, d1-e1 235, e1-h1 245, h1- ps1 200; ventral region: ad1 95, ad2 85, ad3 40, genito-aggenital plate 175×110, ano-adanal plate 398×60.

Prodorsum with one pair of long and strong carinae; sensilli short, smooth and fusiform; lamellar and rostral setae long, smooth and attenuate; rostral setae located on same level of lamellar setae; interlamellar and exobothridial setae short and fine; mutual distance between interlamellar setae shorter than that between lamellar setae; comparative length: ro = le> ss> in = ex. Notogastral setae fine, attenuate, short (c1 / c1-d1 =0.53). Genital plates with six pairs of setae; two pairs of aggenital setae present; anal plates with one pair of anal setae; three pairs of adanal setae present, ad2-ad3 <ad2-ad1, setae ad1 longest, ad3 shortest; lyrifissures iad situated laterally of anal setae. Setae h of mentum longer than distance between them; setation of legs (without tarsi): I: 1-3-4(2)-4(1); II: 1-4-4(1)-4(1), III: 2-2-3(1)-2(1), IV: 2-3-2-2(1); all legs heterotridactylous.

Distribution. China (Fujian), Japan.

Figures

FIGURES 51 – 58. Mesotritia okuyamai Aoki, 1980 (specimen from Fujian): 51, lateral view of body (legs removed); 52, prodorsum, dorsal view; 53, ventral plate; 54, mentum of infracapitulum; 55 – 58, trochanter, femur, genu and tibia: 55, leg I; 56, leg II; 57, leg III; 58, leg IV. Scale bars = 100 μm.