Euphthiracarus aequalis, Liu, Dong, Wu, Donghui & Chen, Jun, 2011

Liu, Dong, Wu, Donghui & Chen, Jun, 2011, Species of Euphthiracarus (Acari: Oribatida: Euphthiracaridae) from China, Zootaxa 2752, pp. 45-61: 46-48

publication ID

http://doi.org/ 10.5281/zenodo.276680

persistent identifier

http://treatment.plazi.org/id/03CEF709-FFDD-121E-70AC-0E399A22FDDC

treatment provided by

Plazi

scientific name

Euphthiracarus aequalis
status

sp. nov.

Euphthiracarus aequalis   sp. nov.

( Figs. 1–3 View FIGURES 1 – 3 )

Material examined. Holotype: adult (in alcohol, CJ-01- 6), China: Sichuan Province, Kangding, Erdaoqiao (30 ° 6 'N, 101 ° 54 'E), from litter under shrub, 2600 M, 8 Aug., 2001, leg. Jun Chen. Paratypes: one adult (in alcohol, CJ-01- 6), same data as holotype; one adult (in alcohol, CJ-01- 10), China: Sichuan Province, Kangding, Erdaoqiao, Niuwo, from litter under birch, 2800 M, 9 Aug., 2001, leg. Jun Chen; seven adults (in alcohol, CJ-01- 12), same data as CJ-01- 10, from litter under bamboo; two adults (in alcohol, CJ-01- 13), same data as CJ-01- 10, from deadwood; eighteen adults (in alcohol, CJ-01- 51), China: Tibet, Bome, Zham Town (27 ° 59 'N, 85 ° 59 'E), from litter under pine tree, 3000 M, 23 Aug., 2001, leg. Jun Chen.

Etymology. The new specific name “ aequalis   ” is from Latin, and refers to the equal length of genital setae.

Measurements. Holotype: Prodorsum: length 380, width 245, height 155, setae: ss 155, in 160, le 90, ro 80, ex 50, distance between setae: ro -ro 70, in -in 115, le -le 55, in -le 135, le -ro 100; notogaster: length 795, width 485, height 500; setae: c 1 128, c 2 115, c 3 95, c p 95, d 1 105, d 2 85, e 1 110, e 2 100, h 1 128, h 2 115, h 3 100, ps 1 130, ps 2 100, ps 3 100; distance between setae: c 1 -d 1 165, d 1 -e 1 195, e 1 -h 1 185, h 1 -ps 1 180; ventral region: genitoaggenital plate 325 × 125, anoadanal plate 355 × 105. Paratypes: Prodorsum: length 310–380, width 230–260, height 120–160; notogaster: length 600–820, width 375–600, height 340–506; ventral region: genitoaggenital plate 335 × 120, anoadanal plate 368 × 110.

Integument: Colour yellowish to tan. Surface of body covered with distinct foveolae, especially dense on dorsal region of prodorsum.

Prodorsum: Two parallel lateral carinae present on each side, upper carina stronger than lower one; bothridial scale situated below bothridium, posterior median apodeme present; sensilli long and setiform, sparsely barbed in distal half; interlamellar, lamellar and rostral setae robust, covered with small spines in distal half; interlamellar setae erect, lamellar setae semi-erect, rostral setae short, spiniform and curved; exobothridial setae short and fine; comparative length: in>ss> le> ro>ex.

Notogaster: 14 pairs of notogastral setae, bacilliform, relatively short, similar in shape to interlamellar setae, covered with small spines 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 below setae h 1; openings of opisthosomal glands and five pairs of lyrifissures present.

Venter: Genital plates with eight or nine pairs of short setae, nearly equal in length, g 1-3 fine, located in progenital position, other setae thick; two pairs of aggenital setae present, ag 1 short, ag 2 thick and about three times as long as ag 1; three pairs of anal and three pairs of adanal setae present, setae an 1 and an 2 smooth and flagellate at distal end, setae an 3 and adanal setae shorter, robust and covered with small spines in distal half; lyrifissures iad situated between setae an 3 and ad 3.

Gnathosoma: Setae   h of mentum longer than distance between them; palps three-segmented with setal formula: 2 - 2-8 (1).

Legs: Chaetotaxy of legs (without tarsi): I: 1-3 - 5 (2)- 5 (1); II: 1-4 - 3 (1)- 4 (1), III: 2 - 2 - 2 (1)- 2 (1), IV: 2 - 1 - 1 (1)- 2 (1); all legs heterotridactylous.

Distribution. China (Sichuan, Tibet).

Remarks. This new species is similar to E. cribarius ( Berlese, 1904)   , but differs from the latter by following characters: In E. aequalis   , surface of body covered with distinct foveolae, especially dense on dorsal region of prodorsum; rostral setae short and robust, barbed but not flagellate in distal half; ag 2 about three times as long as ag 1. In E. cribarius   , surface of body punctuate; rostral setae thin and relatively long, rough and flagellate at distal end; ag 2 more than four times as long as ag 1.