Euphthiracarus truncatus, Liu, Dong, Wu, Donghui & Chen, Jun, 2012

Liu, Dong, Wu, Donghui & Chen, Jun, 2012, Six new species of the genus Euphthiracarus (Acari: Oribatida: Euphthiracaridae) from China, Zootaxa 3481, pp. 47-59: 56-58

publication ID

http://doi.org/ 10.5281/zenodo.211663

publication LSID

lsid:zoobank.org:pub:8D913C23-AF71-4D14-B346-61A2D7F7029A

persistent identifier

http://treatment.plazi.org/id/5C3EE522-FFA8-6050-FF79-7600FD3D0C46

treatment provided by

Plazi

scientific name

Euphthiracarus truncatus
status

sp. nov.

Euphthiracarus truncatus   sp. nov.

( Figs. 20–24 View FIGURES 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: c 1 95, c 2 87, c 3 60, c p 80, d 1 82, d 2 75, e 1 95, e 2 75, h 1 100, h 2 90, h 3 70, ps 1 95, ps 2 75, ps 3 70; distance between setae: c 1 –d 1 145, d 1 –e 1 125, e 1 –h 1 105, h 1 –ps 1 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 c 1–3 remote from anterior border, setae c 1 slightly more so than setae c 2 and c 3; vestigial setae f 1 located anteriorly of setae h 1; arrangement of opisthosomal glands and lyrifissures typical for genus.

Genital plates each with seven equally long setae, g 1–2 short and fine, located in progenital position, other setae thick; two pairs of aggenital setae present, ag 1 minute, ag 2 slightly thick, about five times as long as ag 1; setae an 1 and an 2 smooth and flagellate at distal end, setae an 3 and adanal setae shorter, robust and covered with small and sparse spines in distal half; lyrifissures iad situated between setae an 3 and ad 3.

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; ag 2 much longer than ag 1.