Fissicepheus (Fissicepheus) confragosus, Zheng & Chen, 2018

Zheng, Li-Hao & Chen, Jun, 2018, Taxonomic study on the genus Fissicepheus (Acari: Oribatida: Otocepheidae) from China, Zootaxa 4410 (3), pp. 539-550 : 544

Fissicepheus (Fissicepheus) confragosus sp. nov.

( Figs. 3–4 )

Material examined (all the specimens were collected by Dong Liu from Sichuan Province, China): Holotype: adult (in alcohol, LD-09-148), Batang County, Lanei Mt. (30°13'55.49"N, 99°14'25.55"E), 3510m a.s.l., from litter under shrub, 6 Jun., 2009 . Paratypes: 30 adults (in alcohol, LD-09-148), same data as holotype ; 29 adults (in alcohol, LD-09-147), same data as holotype ; 1 adult (in alcohol, LD-09-12), Luding County, Moxi Town , Hailuogou (29°34'55.40"N, 102°1'18.30"E), 2800m a.s.l., from litter under forest, 15 May, 2009 ; 1 adult (in alcohol, LD-09-30), Luding County, Moxi Town , Gonga Mt. (29°33'4.39"N, 101°58'11.75"E), 3575m a.s.l., from moss, 18 May, 2009. Other specimens : 1 adult (in alcohol, LD-09-31), same data as LD-09-30 ; 12 adults (in alcohol, LD-09-60), Kangding County, Paoma Mt. (30°2'44.63"N, 101°57'57.78"E), 2703m a.s.l., from litter under shrub, 22 May, 2009 ; 3 adults (in alcohol, LD-09-76), Yajiang County, Qingdagou (30°12'55.04"N, 101°4'16.46"E), 2913m a.s.l., from litter under forest, 26 May, 2009 ; 33 adults (in alcohol, LD-09-90), Yajiang County, Bajiaolou Town (30°7'54.16"N, 101°11'17.95"E), 3013m a.s.l., 29 May, 2009, from litter under pine tree ; 27 adults (in alcohol, LD-09-91), from litter under pine tree and shrub, same data as LD-09-90 ; 2 adults (in alcohol, LD-09-95), from litter under forest, same data as LD-09-90 ; 1 adult (in alcohol, LD-09-101), Litang County, Jiawa Town (29°33'48.74"N, 100°18'33.44"E), 4195m a.s.l., from litter under Rhododendron sp., 31 May, 2009 ; 1 adult (in alcohol, LD-09-136), Batang County, Cuola Town (30°25'30.68"N, 99°27'53.75"E), 3871m a.s.l., 4 Jun., 2009, from litter under shrub ; 1 adult (in alcohol, LD-09-137), from litter under pine tree, same data as LD-09-136 ; 1 adult (in alcohol, LD-09-146), same data as holotype.

Etymology. The specific epithet “ confragosus ” is from Latin for “rough surface” and refers to granules on surface of trochanter and femur.

Description. Measurements. Holotype: body length 660, width 330, notogastral length 440, setae lengths: ss 70, in 50, le 100, ro 90, ex 10, mutual distances of setae: c -c 130, la -la 170, lm -lm 140, lp -lp 260, h 2- h 2 180, h 1- h 1 140. Paratypes (n=30): body length 590–750, width 230–370.

Prodorsum ( Figs. 3a, 3c ). Spa.l well developed, fused to each other to form a brim-like structure ( Fig. 3c ). Setae ro and le glabrous, curved inward. Seta le well removed backward from tip of lamella. Lamella thick, with distinct foveolae. Distance of outer margins of lamellae at the level of apexes of pedotecta I accounting for ca. 48% (holotype) of distance between apexes of pedotecta I. Seta in shorter than their mutual distance, with a blunt tip. Surface of prodorsum lateral to lamella with fine granules. Ss short, with a fusiform head. Two pairs of prodorsal condyles present, co.pm drop-shaped, with a rounded head. An arched swelling found between two co.pl and through under co.pm.

Notogaster ( Figs. 3a–b ). L/W of notogaster about 1.3 (holotype). Surface of notogaster densely punctate. Two pairs of notogastral condyles present, co.nl triangular, co.nm inserted on opposite position of co.pm, well separated. Ten pairs of notogastral setae (c, la, lm, lp, h 1, h 2, h 3, p 1, p 2, p 3) present, nearly same in length (range 45–53), thick and blunt at tip, mutual distance p 2 -p 3> p 2 -p 1. Lyrifissures ih and ips situated anterior to h 3 (fig. 3b).

Venter ( Fig. 3d ). One pair of subcapitular setae h present. Surface of ventral plate punctate. Epimeral setal formula: 2-0-2-3. Apo.2 and apo.sj distinctly developed, apo.3 short. Several poorly developed longitudinal wrinkles present on genital plate. Four pairs of genital setae, mutual distances g 1- g 1= g 2- g 2= g 4- g 4<g 3- g 3. Co.ag well developed, each with a rounded tip. Anal plate well punctate, with two pairs of anal setae, mutual distance an 1 - an 1<an 2 -an 2. Three pairs of adanal setae nearly equal in length, blunt at tip, ad 3- ad 3 at level of anterior margin of anal opening. Adanal lyrifissure (iad) situated anteromedially of ad 3.

Legs ( Fig. 4 ). All legs monodactyle, all ultimate setae L-type. Surface of femur (leg I–IV) and trochanter (leg III–IV) densely granulated ( Figs. 3b , Fig. 4 ). Formulae of leg setation and solenidia: I (1-4-3-4-16) [1-2-2], II (1-4- 3-3-15) [1-1-2], III (2-3-1-2-14) [1-1-0], IV (1-2-1-2-12) [0-1-0].

Remarks. F. confragosus n. sp. is easily distinguished from other known species of this genus by having dense granules on the surface of femora I–IV and trochanters III–IV.

Figures

FIGURE3. Fissicepheus (Fissicepheus) confragosus n. sp.: a, dorsal aspect (legs removed); b, lateral view of notogaster, with trochantersand femora of legs III–IV; c, lateral view of prodorsum; d, ventral aspect (legs removed).

FIGURE4. Fissicepheus (Fissicepheus)confragosus n. sp.: a, legI, antiaxial view; b, leg II,antiaxial view; c,leg III, antiaxial view; d, leg IV, antiaxial view.Scal bars: a–d=50µm.