Mesoplophoroidea (Acari, Oribatida) of China Author Liu, Dong text Zootaxa 2016 2016-02-29 4084 4 519 539 journal article 31447 10.11646/zootaxa.4084.4.4 65b49fb4-4956-42e4-bdfa-b3b0c5fc7f5f 1175-5326 1052321 AF140B6F-66F3-4287-825D-FECA65FEF0C3 Mesoplophora ( Mesoplophora ) heterotricha sp. nov. ( Figs 3A–C ) Diagnosis . Surface of body punctate; lateral carinae of prodorsum absent; sensilli, lamellar and interlamellar setae long, thick and smooth; rostral setae thin; exobothridial setae minute, shorter than diameter of bothridia; in–in>ro– ro ; “notogastral” setae similar in shape as interlamellar setae, except setae c 3 thin; Setae h of mentum shorter than distance between them; formula of genital setae 6: 1; eight pairs of ventral setae unequal in length; “ano-adanal” plates with two pairs of smooth setae. Description . Measurements . Holotype : Prodorsum: length 195, width 135, height 82, setae: ss 108, ro 40, le 65, in 80, ex 4; mutual distance: in–in 85, le–le 126, ro–ro 75; “notogaster”: length 302, width 260, height 252; setae: c 1 88, c 2 82, c 3 50, c p 72, d 1 90, d 2 90, e 1 80, e 2 70; ventral region: an 1 20, an 2 20; genito-aggenital plate 65×35, “ano-adanal” plate 70×30. Paratypes (n=3): Prodorsum: length 200–205, width 135–142, height 85–88; “notogaster”: length 310–320, width 255–265, height 250–255. Integument . Colour yellowish. Surface of body punctate. Prodorsum ( Figs 3 A –B ). Lateral carinae absent; sensilli ( ss ) long, thick, smooth and pointed distally; interlamellar and lamellar setae ( in and le ) long, thick and smooth; rostral setae ( ro ) thin and smooth; exobothridial setae ( ex ) minute, shorter than diameter of bothridia; comparative length: ss>in>le>ro>ex ; mutual distance of setae: le–le > in–in>ro–ro . “Notogaster” ( Fig. 3 A ). 8 pairs “notogastral” setae present, all long ( c 1/ c 1– d 1≈0.9), thick and smooth, except setae c 3 shorter and much thinner; setae c 1– c 3 form almost equally spaced row. Ventral region ( Figs 3 A , C ). Setae h of mentum shorter than distance between them. Seven pairs of genital setae ( g ) with formula: 6: 1; ventral plate with eight pairs of setae unequal in length; “ano-adanal” plates with two pairs of smooth setae. Legs . Chaetotaxy of legs complete; setal counts for leg segments: I: 0-3-3(2)-4(1)-15(3); II: 0-4-2(1)-2(1)- 13(2), III: 2-3-2(1)-2(1)-10, IV: 2-3-2-2-8; tarsi monodactylous. FIGURE 3. Mesoplophora ( Mesoplophora ) heterotricha sp. nov. : A, lateral view of body (legs removed); B, prodorsum, dorsal view; C, ventral region. Scale bars=100 µm. Material examined . Holotype : adult ( NIGA , in alcohol), CHINA , Hainan Province , Lingshui , from litter under Alsophila sp., 15 May 2013 , leg. Yuting Huang . Paratypes : 1 adult ( NIGA , in alcohol), same data as holotype ; 2 adults ( NIGA , in alcohol), from moss in the tree hole, other data same as holotype. Type deposition . Type specimens are deposited in NIGA. Etymology . The new specific name “ heterotricha ” refers to the different shapes of prodorsal and “notogastral” setae. Remarks . This new species is close to Mesoplophora ( M .) frogneri Niedbała, 2004 from Sarawak , Malaysia in having similar shape of sensilli, most prodorsal and “notogastral” setae; exobothridial setae shorter than diameter of bothridia; lamellar setae situated closer to interlamellar setae; in–in>ro–ro ; eight pairs of ventral setae present; aggenital position without setae; and formula of genital setae 6:1. However, this new species can be easily distinguished by: (1) lateral carinae of prodorsum absent (versus present in M . ( M .) frogneri ); (2) rostral setae much thinner than interlamellar setae (versus similar in shape as interlamellar setae); (3) setae c 3 much thinner than other “notogastral” setae (versus similar in shape); (4) setae c 1– c 3 form almost equally spaced row (versus setae c 3 closer to anterior border).