Ololaelaps wangi Bai, Gu & Wang, 1996

Keum, Eunsun, Jung, Chuleui & Joharchi, Omid, 2017, New species and new records of the family Laelapidae (Acari: Mesostigmata) from Republic of Korea, Zootaxa 4353 (3), pp. 485-505 : 500

Ololaelaps wangi Bai, Gu & Wang

( Figures 32–38 )

Ololaelaps wangi Bai et. al., 1996 : 74.

Pseudoparasitus venetus .— Kontschán et. al., 2016: 30 (misidentification).

Specimens examined. three females, Geumgok-ri, Andong, Republic of Korea, 36°23' N, 128°55' E, alt. 213 m, 0 8 March 2016, E. Keum coll., from soil of apple orchard (deposited in PMANU) ; one female, Gapcheon-myeon , Hoengseong-gun, Gangwon province, Republic of Korea, 37°31' N, 128°09' E, alt. 984 m, 12 April 2014, E. Keum coll., from soil of grassland (deposited in PMANU) ; one female, World Cup Park , Seoul, Republic of Korea, 37°32' N, 127°02' E, alt. 594 m, 19 May 2016, E. Keum coll., from soil of grassland (deposited in PMANU) .

Notes. Kontschán et. al. (2016) reported Pseudoparasitus venetus (Berlese) from Yanggang-do, North Korea, on the basis of one specimen collected from moss. We have not had the opportunity to examine that specimen, but on the basis of the published illustration of the specimen ( Kontschán et. al., 2016), we believe this was a misidentified specimen of Ololaelaps wangi because the peritrematal shields are obviously free and not fused to the genito-ventro-anal shield (in Ololaelaps venetus the peritrematal shield is obviously fused to the genito-ventralanal shield). Ololaelaps wangi can be easily distinguished from other members of the genus by the fusion of the metapodal and exopodal shields behind coxa IV, and the lateral fusion of these shields to the genito-ventro-anal shield; furthermore, the peritrematal shield is free posteriorly (i.e. not fused to the metapodal-exopodal shield). Here we provide morphological features of O. wangi to complement the original description of Bai et. al., 1996.

Dorsal shield ( Fig. 32 ) with 38 pairs of setae 21 podonotal, 17 opisthonotal, including one pair of Zx setae between J and Z setae; setae almost of subequal length (23–27), except Z5 (16–18); all setae not reaching base of next posterior seta. Dorsal shield oval, length 515–535, width at level of s6, 416–421 (n= 5), wrapping around onto ventral idiosoma, forming a marginal strip ( Fig. 32 ). Sternal shield (length 94–104) narrowest between coxae II (84–94), widest between coxae II–III (139–148), with slightly straight anterior and posterior margin, with three pairs of long, smooth pointed setae (st 1–3 39–43), sternal shield entirely reticulated. Genito-ventro-anal shield ( Fig. 33 ) large (272–282 long × 213–223 wide), bearing six pairs of setae (32–34, except Zv2 and Jv 3 23–25) (including st5 and excluding three circum-anal setae); shield reticulated; metapodal and exopodal shields fused, also laterally fused to genito-ventro-anal shield ( Fig. 33 ). Peritrematal shield free posteriorly, post-stigmatal section narrow, with three pairs of discernible pore-like structures (two lyrifissures ‘ ip ’, and one gland pore ‘ gp ’; see Fig. 33 ), peritreme extending from posterior margin of coxa III to near mid-level of coxa I. Epistome irregularly denticulate laterally, apical section with minute denticles ( Fig. 34 ). Hypostomal groove narrow, with six rows of denticles each bearing two to four very small teeth and a smooth anterior transverse line ( Fig. 35 ). Palp tarsal claw with three pointed tines of unequal length, proximal tine shortest. Palp trochantal setae simple, needle-like. Fixed digit of chelicera with three teeth ( Fig. 36 ), pilus dentilis short and slender, dorsal seta short, semi-erect, movable digit with two large subterminal teeth, arthrodial membrane a rounded flap with a corona and cheliceral lyrifissure indistinct.

Legs. Legs II and III short (292–302, 262–272), I and IV longer (356–366, 366–376). Chaetotaxy normal for free-living Laelapidae : Leg I: coxa 0 0/1 0/1 0, trochanter 1 1/2 0/1 1, femur 2 3/2 2/2 2, genu 2 3/2 3/1 2, tibia 2 3/ 2 3/1 2. Leg II: coxa 0 0/1 0/1 0, trochanter 1 0/1 0/2 1, femur 2 3/1 2/2 1 ( Fig. 37 ), genu 2 3/1 2/1 2 (ad2 and pd2 inserted on small tubercles, Fig 37 ), tibia 2 2/1 2/1 2 ( Fig. 37 ). Leg III: coxa 0 0/1 0/1 0, trochanter 1 0/1 0/2 1, femur 1 2/0 1/1 1, genu 2 2/1 2/1 1, tibia 2 1/1 2/1 1. Leg IV: 0 0/1 0/0 0, trochanter 1 0/1 0/2 1, femur 1 2/1 1/0 1 ( Fig. 38 ), genu 2 2/1 3/0 1 ( Fig. 38 ), tibia 2 1/1 3/1 2 ( Fig. 38 ); all setae fine and needle-like. Tarsi II-IV with 18 setae 3 3/2 3/2 3 + mv, md. All pre-tarsi with a pair of claws and a long thin membranous ambulacrum.

Figures

FIGURES 32–36. Ololaelaps wangi Bai et. al., 1996, female. 32, dorsal idiosoma; 33, ventral idiosoma; 34, epistome;35, subcapitulum; 36, chelicera.

FIGURES 37–38. Ololaelaps wangi Bai et. al., 1996, female. 37, femur, genu and tibia II; 38, femur, genu and tibia IV.