Veigaia beinaxinae, Chen & Gao, 2015

Chen, Wan-Peng & Gao, Ping, 2015, Two new species of the genus Veigaia from China (Acari: Mesostigmata: Veigaiaidae), Zoological Systematics 40 (2), pp. 191-196 : 193-195

Veigaia beinaxinae sp. nov. ( Figs 10–13 )

Description. Female (holotype & paratype). Dorsum ( Fig. 10 ). Idiosoma length 834, width 599, oval and pale yellow. Dorsal shield composed of 2 shields, reticulated. Anterior dorsal shield length 478, width 527, middle of posterior margin slightly convex, bearing 22 pairs of setae and 3 pairs of lyriform pores. Dorsal setae j 1 (72), j 4 (68), z 5 (68), r 3 (108) all with microsetae, longer and stouter than other setae. Seta j 3 length (48), s 6 (48) longer than j 6 (40) and z 6 (36). Posterior dorsal shield length 275, width 470, bearing 18 pairs of smooth setae and 4 pairs of lyriform pores, anterior margin slightly concaved, posterior margin flat, 8 pairs of setae on membrane between dorsal shield and ventral shield.

© Zoological Systematics, 40(2): 191–196

Venter ( Fig. 11 ). Presternal shield composed 2 pairs of platelets, irregularity and without reticulation. Sternal shield length 160, width 120, ornamented reticulation obviously between St 2 and St 3; anterior margin of sternal shield concaved, 2 lateral angles extended between coxae Ⅰ and II, posterior margin flat with faintly sclerotized. Sternal shield with 3 pairs of setae and 2 pairs of lyriform pores, St 1 length 64, St 2 length 64, St 3 length 52, distance between St 2 and St 3 60 in length. 1 pair of metasternal shields sliver-like with 1 pair of setae and 1 pair of lyriform pores. Small part of metasternal shield coalesced with genital shield. Genital shield reticulated, bearing 3 pairs of setae, middle pair tiny, genital region with ring-like structure, forked structure behind it, posterior margin of genital shield coalesced with ventral shield. Punctiform organ area with 14 pairs of pores arranged in 2 rows. Ventral shield inverted trapezium in shape, with 5 pairs of setae, the anterior 3 pairs short and the posterior 2 pairs longer; anterior margin of ventral shield with V-shaped gap on inner side of peritrematal shield. Posterior margin of peritrematal shield coalesced with antero-lateral angle of ventral shield, 1 pair of parastigma setae, 1 pair of lyriform pores behind stigmas. 1 pair of metapodal shields, sliver-like and 2 tines on inner part of anterior tip. Length of setae between ventral shield and anal shield 1/5 of the length of the last pair of setae on ventral shield, anal shield triangle, angles round and blunt, with slight reticulation, length 98, width 112,with 3 perianal setae, postanal seta length 16, adanal setae length 32, anal pore length 28. Tritosternal base length 108, width 16. Laciniae bifid, with a few branches.

Gnathosoma ( Figs 12–13 ). Seta f 1 of palpfemur tiny and thin on tip with a few microsetae. Seta g 1 on palpgenu with many prongs on anterior margin, seta g 2 bared tip. Tectum with 3 projections, middle projection long expanded terminally torch-like, with clump branches, 2 lateral projections with 2 large teeth on tip.

© Zoological Systematics, 40(2): 191–196

Legs. Leg IV with club-like setae except coxae, blunted round tip with microsetae, chaetotaxy as follows: 2-4-9-9-3 （trochanter- femur- genu- tibia- tarsus).

Male. Unknown.

Material examined. Holotype female, from soil, Shenyang City (41°08′N, 123°38′E), May 1984, coll. Sui-Gong Yin. Paratype 1 female, same data as holotype .

Etymology. The new species is named in honor of Dr. Na-Xin Bei, a famous acarologist in China.

Remarks. The new species is similar to V. cuneata Ma, 1996 , but differs in the latter by following. The new species has 2 pairs of presternal shields, but without slender platelets between presternal shields and coxae I, while the latter has 1 pair of presternal shields, and 2 slender platelets between presternal shields and coxae I. In the new species, all the sternal shield has reticulation especially central part, rather than only lateral margin of sternal shield with reticulation in V. cuneata . In new species, parastigma seta bears behind stigma, while parastigma seta bears on inner margin of plate in V. cuneata . Additionally, the new species has posterolateral margin of genital shield sharp, while V. cuneata has posterolateral margin of genital shield round.

© Zoological Systematics, 40(2): 191–196

Figures

Figs 10–13. Veigaia beinaxinae sp. nov., female. 10. Dorsum. 11. Venter. 12. Palp femur and genu. 13. Tectum. Scale bars: 10–11= 100μm, 12–13=50μm.