Suctobelbella triangulata Liu & Wu, 2013, sp. nov.
Creators: name: Liu, Dong
name: Wu, Donghui
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Suctobelbidae
Suctobelbella
Suctobelbella triangulata

description: Suctobelbella triangulata sp. nov.
(Figs. 1 -9)
Material examined: Holotype: adult (in alcohol, LD-10-270), China: Heilongjiang Province, Shuangyashan City, Baoqing County, Bawusan Farm (46°30'30.76"N, 133°15'18.00"E), from litter, 142 m a.s.l., 16 Aug., 2010, leg. Dong Liu and Donghui Wu. Paratypes: 2 adults (in alcohol, LD-10-277), same data as holotype, from litter under poplar tree; 4 adults (in alcohol, LD-10-199), same data as holotype.
Etymology. The new specific name “ triangulata ” is from Latin and refers to the shape of lamellar knob.
Measurements: Holotype: length of body: 280, width of body: 155, length of prodorsum: 115, width of prodorsum: 102.
Surface of prodorsum covered with many tubercles except tectopedial fields smooth; rostral apex medially concaved with a long, slender and acute tooth bilaterally (directed downwards, not projecting distinctly beyond rostral apex in dorsal view), followed by two large rostral teeth: 1st one thick and slightly rounded, 2nd one smaller, slender and acute; tectopedial fields elongate oval in shape, with irregular inner margin and opened anterior margin; lamellar knob developed and triangular in shape; interbothridial fields and bothridial lobes distinct; sensilla with long stalk and short spindle-shaped head; the head pointed at tip, with bristles densely on outer edge; rostral setae geniculate and ciliated on the basalin the basal half; lamellar setae thin and medium long, directed forward; interlamellar and exobothridial setae short and fine.
Notogaster oval in shape; notogastral condyles large and triangular, co.nl slightly smaller, connected with co.nm basally; nine pairs of notogastral setae present, smooth, long setiform and gently curved; all setae nearly same length except for h 1, p1, p2 which are short; setae c far from the posterior margin of co.nl; setae la inserted at the level between c and lm, more close to setae c; setae lm not reaching the insertion of setae lp.
Epimeral borders not touching medially, epimeral cavity indistinct; epimeral setae short and fine, no essential difference among them; epimeral formula: 3-1-2-3; six pairs of genital setae present, g1 longer than the rest setae, setae g5 and g6 situated closely at a middle portion along the width of plate, setae g1 to g4 converging anteriorly to inner margin; one pair of aggenital setae present, arising far laterally; three pairs of adanal setae and two pairs of anal setae present; setae ad1 inserted at the level between setae an1 and an2; lyrifissures iad paraanal near anal anterior margin; relative length of setal intervals: ag - ag> ad2 - ad2> ad3 - ad3 ≈ ad1 - ad1.
Setae h of mentum shorter than distance between them; setal counts for leg segments: I: 1-4-2(1)-4(2)-18(2); II: 1-4-1(1)-4(1)-14(2), III: 2-3-1(1)-2(1)-14, IV: 1-2-1-2(1)-9; all legs monodactylous.
Distribution. Known only from the type locality.
Remark. This new species is similar to Suctobelbella prominens (Moritz, 1966) in the presence of similar shape of closely adjacent rostral teeth, spindle-shaped ciliated sensilla, and similar size of the body and notogastral setae, but can be easily distinguished from the latter species by following characters: only two rostral teeth present; lamellar knob triangular in shape; rostrum slightly narrower; the head of sensilla without terminal spine; tectopedial fields opened anteriorly; co.nl large, connected with co.nm basally.
description: Published as part of Liu, Dong & Wu, Donghui, 2013, Three new species of the genus Suctobelbella (Acari: Oribatida: Suctobelbidae) from Sanjiang Plain, Northeast China, pp. 131-138 in Zootaxa 3637 (2) on pages 131-132, DOI: 10.11646/zootaxa.3637.2.4, http://zenodo.org/record/219568