Plonaphacarus lanceolatus Liu, Wu & Chen, 2011, sp. nov

Plonaphacarus lanceolatus sp. nov. (Figs. 41���49) Material examined. Holotype: adult (in alcohol, W- 89 - 52), China: Fujian Province, Wuyi Mt. (27 �� 45 ' 23.97 "N, 118 �� 2 ' 7.11 "E), Tianyou, from litter under bamboo and arbor forest, 25 Apr., 1989, leg. Hui-Fu Wang. Paratypes: ten adults (in alcohol, W- 89 - 52), same data as holotype; five adults (in alcohol, W- 89 - 56), same data as holotype. Etymology. The new specific name ��� lanceolatus ��� is from Latin, and refers to the shape of sensilli. Measurements: Holotype: Prodorsum: length 330, width 215, height 108, setae: ss 120, ro 30, in 170, le 35, distance between setae: ro -ro 35, in -in 80, le -le 140; notogaster: length 660, width 458, height 435; setae: c 1 170, c 2 136, c 3 155, c p 135, d 1 140, d 2 136, e 1 155, e 2 140, h 1 195, h 2 155, h 3 125, ps 1 195, ps 2 151, ps 3 120, ps 4 105; distance between setae: c 1 -d 1 182, d 1 -e 1 220, e 1 -h 1 150, h 1 -ps 1 105; ventral region: ad 1 120, ad 2 135, ad 3 55, an 1 75, an 2 75; genitoaggenital plate 220 �� 160, anoadanal plate 265 �� 120. Paratypes: Prodorsum: length 274���325, width 192���240, height 103���125; notogaster: length 535���710, width 345���500, height 337���520. Colour grey-yellowish. Surface of body covered with small concavities. Prodorsum with two distinct dorsal carinae; lateral carinae strong and long, extend beyond sinus and reach end of rostrum; dorsal region longer than lateral region; posterior furrows present; sensilli long with narrow pedicel and lanciform head, covered with small spines; interlamellar setae long, robust, erect, covered with small spines; lamellar and rostral setae spiniform, thin, short, rough and semi-erect; exobothridial setae vestigial; comparative length: in>ss > le>ro. Notogaster with 15 pairs of setae, relatively long (c 1 < c 1 -d 1), robust, covered with small spines in distal half, setae h 1 and ps 1 longest, setae ps 4 shortest; setae c 1-3 slightly remote from anterior border, setae c 2 more so than c 1 and c 3; vestigial setae f 1 situated at level of setae h 1; two pairs of lyrifissures ia and im present. Nine pairs of genital setae present, arranged in two rows with formula: 7 (4 + 3): 2; one pair of aggenital setae present; anoadanal plates each with five well-developed and rough setae, setae ad 2 longest, setae ad 3 shortest, shorter than anal setae. Setae h of mentum vestigial; chaetotaxy of legs (without tarsi): I: 1-4 - 2 (2)- 5 (1); II: 1-3 - 2 (1)- 3 (1), III: 2 - 2 - 1 (1)- 2 (1), IV: 2 - 1 - 1-2 (1); v������ / v��� (femora I)= 2.2; setae d on femora I remote from distal end; setae a������ on tarsi I curved distally; setae a������ and setae ft������ on tarsi II straight distally; setae s on tarsi I absent; setae s on tarsi II and setae s and pv��� on tarsi IV present; setae l��� on genua IV reduced; setae d on tibiae IV long, independent of solenidions; all legs monodactylous. Distribution. Known only from type locality. Remark. This new species is similar to P. is h ik a w a i (Aoki, 1980) and P. kugohi (Aoki, 1959) but differs by following combined characters: prodorsum with two distinct dorsal carinae; lateral carinae strong and long, extend beyond sinus and reach end of rostrum; sensilli long with narrow pedicel and lanciform head, covered with small spines; lamellar setae longer than rostral setae; exobothridial setae vestigial; setae h of mentum vestigial; genital setae with formula: 7 (4 + 3): 2; setae d on femora I remote from distal end. This new species is also similar to P. bicarinatus sp. nov., and the differences between them can be seen from the remark of P. bicarinatus.
Published as part of Liu, Dong, Wu, Donghui & Chen, Jun, 2011, Review of Plonaphacarus (Acari: Oribatida: Steganacaridae), with descriptions of eight new species from China, pp. 1-26 in Zootaxa 2739 on page 15, DOI: 10.5281/zenodo.201395
{"references":["Aoki, J. (1980) A revision of the oribatid mites of Japan. I. The families Phthiracaridae and Oribotritiidae. Bulletin of the Institute of Environmental Science and Technology, Yokohama National University, 6 (2), 1 - 89.","Aoki, J. (1959) Die Moosmilben (Oribatei) aus Sudjapan. Bulletin of the Biogeographical Society of Japan, 21 (1), 1 - 22."]}