Euphthiracarus truncatus Liu, Wu & Chen, 2012, sp. nov.
Creators: name: Liu, Dong
name: Wu, Donghui
name: Chen, Jun
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Euphthiracaridae
Euphthiracarus
Euphthiracarus truncatus

description: Euphthiracarus truncatus sp. nov.
(Figs. 20–24)
Material examined: Holotype: adult (in alcohol, W-97-5), China: Guangdong Province, Zhaoqing City, Dinghushan National Nature Reserve (23° 9'35.51"N, 112°33'15.05"E), from litter under shrub and ruderal, 20 Oct., 1997, leg. Hui-Fu Wang. Paratypes: ten adults (in alcohol, W-97-5), same data as holotype.
Etymology. The new specific name “ truncatus ” is Latin for “truncate” and refers to the truncate head of sensilla.
Measurements: Holotype: Prodorsum: length 275, width 190, height 100, setae: ss 102, ro 60, in 126, le 75, ex 15, distance between setae: ro–ro 35, in–in 83, le–le 41, in–le 90, le–ro 75; notogaster: length 521, width 365, height 360; setae: c1 95, c2 87, c3 60, c p 80, d1 82, d2 75, e1 95, e2 75, h1 100, h2 90, h3 70, ps1 95, ps2 75, ps3 70; distance between setae: c1–d1 145, d1–e1 125, e1–h1 105, h1–ps1 85; ventral region: genitoaggenital plate 185×95, anoadanal plate 265×75. Paratypes: Prodorsum: length 240–320, width 175–222, height 90–120; notogaster: length 440–649, width 290–435, height 280–400.
Colour tan to brown. Surface of body covered with dense and great foveolae, except region under lateral carinae smooth.
Rostrum of prodorsum distinctly protruded; two pairs of lateral carinae present, upper carina longer and stronger than lower one; sensilla with long and narrow pedicel and dilated head, truncate distally and covered with long and robust spines; interlamellar setae long, robust, erect, covered with small and sparse spines in distal half; lamellar setae similar in shape to interlamellar setae, sparsely barbed in distal half; rostral setae smooth and semierect, flagellate and directed outwards distally; exobothridial setae short and fine; comparative length: in>ss> le> ro>ex.
Notogaster setae similar in shape to lamellar setae, sparsely barbed in distal half; setae c1–3 remote from anterior border, setae c1 slightly more so than setae c2 and c3; vestigial setae f1 located anteriorly of setae h1; arrangement of opisthosomal glands and lyrifissures typical for genus.
Genital plates each with seven equally long setae, g1–2 short and fine, located in progenital position, other setae thick; two pairs of aggenital setae present, ag1 minute, ag2 slightly thick, about five times as long as ag1; setae an1 and an2 smooth and flagellate at distal end, setae an3 and adanal setae shorter, robust and covered with small and sparse spines in distal half; lyrifissures iad situated between setae an3 and ad3.
Setae h of mentum longer than distance between them; palps three-segmented with setal formula: 2-2-8(1); chaetotaxy of legs (without tarsi): I: 1-2-3(2)-4(1); II: 1-2-3(1)-4(1), III: 2-2-2(1)-2(1), IV: 2-1-1(1)-2(1); all legs heterotridactylous.
Distribution. Known only from the type locality.
Remark. This new species is similar to E. cribrarius and E. paravesciculus Niedbała, 2004, but differs from them by following combined characters: rostrum of prodorsum distinctly protruded; sensilla with dilated head, truncate distally and covered with long spines; rostral setae smooth and semi-erect, flagellate and directed outwards distally; ag2 much longer than ag1.
description: Published as part of Liu, Dong, Wu, Donghui & Chen, Jun, 2012, Six new species of the genus Euphthiracarus (Acari: Oribatida: Euphthiracaridae) from China, pp. 47-59 in Zootaxa 3481 on pages 56-58, DOI: 10.5281/zenodo.211663