taxonID	type	description	language	source
D25AD024FFA1983F01C7A9977793F97C.taxon	materials_examined	Type species Laelaps claviger Berlese, 1883: 2; by original designation.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA1983F01C7A9977793F97C.taxon	diagnosis	Diagnosis. The diagnosis of Cosmolaelaps used here is based on that of Moreira et al. (2014).	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA1983D01C7AAA37626FBC0.taxon	description	(Figures 1 – 7)	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA1983D01C7AAA37626FBC0.taxon	discussion	Remarks. Cosmolaelaps chianensis was described from China (Gu, 1990). It has been found associated with Mus pahari Thomas (Rodentia: Muridae). The description of this species is brief and both the description and illustrations lack many important details. Ma (2006) considered that Cosmolaelaps hefeiensis is a junior synonym of C. chianensis. However, Ma (2006) did not provide any explanation for this decision, nor did he provide the details of the examined specimens. Cosmolaelaps hefeiensis was also described from China (Xu & Liang, 1996). It has been found from moss (Xu & Liang, 1996) and this species also has been recorded from soil in Republic of Korea (Keum et al., 2017) and Russia (Marchenko, 2017). By comparing the descriptions and figures of these two species, we found some distinguishing morphological differences: (1) dorsal shield setae J 5 and Z 5 more or less similar in length, and j 1 considerably shorter than j 2 in C. hefeiensis (see Xu & Liang, 1996 and Fig. 1 of current study), while in C. chianensis setae Z 5 are obviously longer than J 5 and j 1 is similar length to j 2 (see Fig. 1 in Gu, 1990); (2) body size 395 long, 255 wide in C. chianensis (see Gu, 1990), while in C. hefeiensis size of body larger, especially its width (484 – 560 long, 345 – 391 wide) (see Xu & Liang, 1996). Our efforts to see type material of these two species were not successful so, in this study we follow Ma’s (2006) treatment and provisionally retain these two species as synonyms until further comparative studies clarify their relationship. Our concept of the species is based on that of Xu & Liang (1996) and the diagnosis given as follows is based primarily on specimens from Russia, but also in comparison with the original description of C. hefeiensis. Our specimens agree very well with the description given by Xu & Liang, 1996 for Cosmolaelaps hefeiensis. The species is easily recognised by the long and thick setae of the dorsal shield (most setae long enough to reach well past the base of next posterior seta) (Fig. 1), j 1, z 1, Z 5 simple and without knob at their bases, j 1 apically bent (hook shaped) and Z 5 shorter than J 5 (J 5 ≈ 1.5 x Z 5) (Fig. 1); sternal setae short, at most reaching base of next setae (Figs 2, 3), soft opisthogastric cuticle bearing 16 pairs setae, Jv 4 – 5 and Zv 4 – 5 thickened (Figs 2, 4), post-anal seta slightly thicker and longer than para-anal setae (Figs 2, 4), fixed digit of chelicera of female with six teeth, including three large proximal teeth (posterior to pilus dentilis) (Fig. 5), spatulate seta on legs absent, genu and tibia of leg I without conspicuously thickened seta (Figs 6, 7).	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA3983601C7A83F70F6F96C.taxon	description	(Figures 8 – 24)	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA3983601C7A83F70F6F96C.taxon	materials_examined	Type material. Holotype, female, vicinities of Uspenka, Tyumen Province, Russia, 57 ° 04 ' N, 65 ° 04 ' E, 18 October 2021, Alexander A. Khaustov coll., in the nest of Lasius niger (L.) (Hymenoptera: Formicidae) (in TUMZ). Paratypes: five females, same data as holotype (in TUMZ).	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA3983601C7A83F70F6F96C.taxon	diagnosis	Diagnosis (adult female). Dorsal shield with weak reticulate ornamentation, bearing 39 pairs of relatively long (sub-equal), knife-shaped setae, mostly reaching base of next posterior setae in series, Z 5 shorter than J 5 (ratio of J 5 / Z 5 length ≃ 1.5); presternal area lightly sclerotised, anterior margin of shield hardly conspicuous, posterior margin distinctly concave, ratio of shield length / width (at broadest level) ≃ 0.8; genital shield ratio of length / width (at broadest level) ≃ 2.4, shield ornamented posteromedially by 7 – 8 cells flanked by a median Λ-shaped ornamentation, anal shield ratio of length / width (at broadest level) ≃ 1.2, circum-anal setae smooth and subequal, post-anal seta thickened; distance between genital and anal shields is shorter than length of anal shield. Fixed digit of chelicera with six teeth of various sizes. Legs without spatulate setae but most setae conspicuously thickened and some inserted on small tubercles. Legs I and IV shorter than length of idiosoma.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA3983601C7A83F70F6F96C.taxon	description	Description. Female (n = 6) Dorsal idiosoma (Figs 8, 13, 15, 16). Dorsal shield oval shaped, small, 389 – 406 long, 256 – 265 wide, covering entire dorsal idiosoma, shield with weak reticulation, more distinct in opisthonotal and lateral regions. Shield with 39 pairs of almost uniform length setae (28 – 40), including two pairs of Zx setae between J and Z setae and three unpaired supernumerary seta Jx between J 2 and J 4, except j 1, Z 5 (14 – 18) simple and thickened, j 1 apically bent (hook shaped), z 1 (15 – 18) and J 5 (21 – 24) shorter (Figs 15, 16). All setae slightly swollen near the base and pointed at tip (knife-shaped), reaching base of following setae, setae of central area shorter (not reaching base of following setae) (Figs 8, 13, 15, 16). Dorsal shield with 22 pairs of pore-like structures, including seven pairs of gland openings (gd 1, gd 2, gd 4, gd 5, gd 6, gd 8, gd 9) and 15 pairs of poroids, id 6 indistinct. Shape, position and relative length and shape of setae shown in Figures 8, 13. Ventral idiosoma (Figs 9, 14, 17). Tritosternum with paired pilose laciniae (64 – 68), fused basally (3 – 5), columnar base 23 – 27 × 12 – 15 wide; presternal area lightly sclerotised, with a few transverse curved lines, merged to sternal shield. Sternal shield (length 92 – 96) narrowest between coxae II (74 – 80), widest (114 – 118), anterior margin of shield hardly conspicuous, posterior margin distinctly concave, anterolateral corners narrowly extending between coxae I – II, distally bearing gland pores gvb; endopodal elements between coxae II and III fused with shield and endopodal elements III / IV elongate, narrow and curved. Sternal shield with three pairs of smooth setae (st 1 31 – 33, st 2 28 – 30, st 3 24 – 27) and two pairs of slit-shaped pore-like structures (iv 1 adjacent to setae st 1; iv 2 between st 2 and st 3), setae not reaching base of following setae, shield with lineate-reticulate ornamentation on lateral surface, longitudinally median part smooth (or faintly reticulated) (Figs 9, 14). Metasternal setae st 4 (24 – 27) and metasternal poroids located on soft integument; metasternal platelets absent. Genital shield flask-shaped, slightly expanded laterally past level of setae st 5, length 165 – 180, maximum width 71 – 75, posterior margin rounded, anterior hyaline margin of shield irregularly convex, overlapping posterior area of sternal shield (extending beyond base of setae st 3), shield ornamented posteromedially by 7 – 8 cells flanked by a median Λ-shaped ornamentation, bearing a pair of simple setae st 5 (22 – 24) (Figs 9, 14). Shield flanked by two pairs of minute, elongate paragenital platelets; paragenital poroids iv 5 located on soft cuticle lateral to shield near seta st 5. Anal shield subtriangular, rounded anteriorly, length 65 – 70, width 52 – 55, anterior half lineate-reticulate, para-anal setae and post-anal seta subequal in length (15 – 18), post-anal seta thicker, cribrum consisting of a terminal tuft with 3 – 4 irregular rows of spicules, anteriormost rows of spicules extending slightly beyond post-anal seta (Figs 9, 14, 17); anal gland pores (gv 3) on anterolateral margin of anal shield. Soft opisthogastric cuticle surrounding genital and anal shields with one pair of suboval metapodal plates (17 – 19 long × 4 – 6 wide), six pairs of poroids (five ivo; ivp) and 16 pairs of moderately thick setae (Jv 1 – Jv 5, Zv 1 – Zv 5, R 1 – R 4, UR 2 – UR 3); almost all setae uniform in length (11 – 16), and arising on small sclerotised platelet, except Jv 1 – 3 and Zv 1 longer (20 – 24) and setiform (Figs 9, 14, 17). Peritrematal shield well developed laterad peritremes, bearing one gland pore and one poroid at level near coxae II – III, post-stigmatic extension of shield relatively wide, not reaching posterior level of coxae IV, with two pairs of poroids and one pair of gland pores; anterior region of peritrematal shield fused to anterior margin of dorsal shield behind setae z 1. Peritremes long, extending to mid-level of coxa I (near s 1). Two exopodal platelets between coxae II – III and III – IV present, anterior platelet small and subtriangular, those between coxae III – IV slightly extending posteriorly; parapodal platelets strip-like, bearing gland pore gv 2 (Figs 9, 14). Gnathosoma (Figs 10 – 12, 18, 19). Anterior margin of epistome convex, irregularly denticulate, with smooth median spike (Fig. 11). Hypostomal groove with six transverse rows of denticles, each row with 8 – 19 small denticles, with smooth posterior transverse line, groove wider anteriorly, progressively narrowing from anterior to posterior, anteriormost row slightly convex (Figs 10, 18). Corniculi horn-like, internal malae longer than corniculi, comprising a pair of pilose median projections, and 7 – 9 lateral, longer, tentacle-like, smooth projections (Fig. 10); labrum acuminate, considerably longer than internal malae, fringed; hypostomal and capitular setae smooth, h 3 (34 – 40)> h 1 (28 – 31)> pc (21 – 25)> h 2 (11 – 14) (Figs 10, 18). Chaetotaxy of palps: trochanter 2, femur 5, genu 6, tibia 14, tarsus 15, all setae smooth except palpfemur with seta d 3 thickened and inserted on small tubercles, seta al thickened and apically subspatulate; palpgenu with al 1 stout, al 2 paddle-like; palp tarsal claw two-tined (Fig. 19). Supralabral process indistinct. Fixed digit of chelicera with an offset and subapical tooth (gabelzhan), followed by five teeth, a setaceous pilus dentilis, dorsal cheliceral seta prostrate, arthrodial membrane with a rounded flap and normal filaments; cheliceral lyrifissures distinct, movable digit of chelicera bidentate (Fig. 12). Insemination structures (Fig. 20). Laelapid-type sperm access system, tubulus long, wider at the solenostome level of coxa III and entering sacculus via a pair of circular openings. Sacculus irregular, the proximal ends of the tubulus slightly swollen at the junction with ramus, ends of ramus with considerably horn-like projection. Legs (Figs 21 – 24). Legs II and III short (260 – 278, 240 – 255), I and IV longer (365 – 385, 347 – 364) (excluding pre-tarsus). Chaetotaxy normal for free-living Laelapidae (sensu Evans, 1963 a): Leg I (Fig. 21): coxa 0 - 0 / 1, 0 / 1 - 0, trochanter 1 - 1 / 1, 0 / 2 - 1 (al and ad thickened), femur 2 - 3 / 1, 2 / 3 - 2 (al 1, ad 3 and pd 2 thickened), genu 2 - 3 / 2, 3 / 1 - 2 (dorsals and laterals thickened and ad 1 – 3 inserted on small tubercles), tibia 2 - 3 / 2, 3 / 1 - 2 (dorsals and laterals thickened). Leg II (Fig. 22): coxa 0 - 0 / 1, 0 / 1 - 0, trochanter 1 - 0 / 1, 0 / 2 - 1 (al slightly thickened), femur 2 - 3 / 1, 2 / 2 - 1 (ad 1, pd 1 and pd 2 thickened and inserted on small tubercles, pd 2 longest), genu 2 - 3 / 1, 2 / 1 - 2 (dorsals thickened and inserted on small tubercles), tibia 2 - 2 / 1, 2 / 1 - 2. Leg III (Fig. 23): coxa 0 - 0 / 1, 0 / 1 - 0, trochanter 1 - 1 / 1, 0 / 2 - 0 (ad slightly thickened), femur 1 - 2 / 1, 1 / 0 - 1 (ad 1, pd and pl thickened, ad 1 inserted on small tubercle), genu 2 - 2 / 1, 2 / 1 - 1 (all setae on segment slightly thickened), tibia: 2 - 1 / 1, 2 / 1 - 1 (all setae on segment slightly thickened). Leg IV (Fig. 24): coxa 0 - 0 / 1, 0 / 0 - 0, trochanter 1 - 1 / 1, 0 / 2 - 0 (ad thickened), femur 1 - 2 / 1, 1 / 0 - 1 (ad 1 and ad 2 thickened and inserted on small tubercles), genu 2 - 2 / 1, 3 / 0 - 1 (dorsals thickened), tibia 2 - 1 / 1, 3 / 1 - 2 (dorsals and laterals thickened, al 2 inserted on small tubercle). Tarsi II – IV with 18 setae (3 - 3 / 2, 3 / 2 - 3 + mv, md); almost all setae on tarsus II – IV thickened, see Figures 22 – 24. All pretarsi with well-developed paired claws, rounded pulvilli and normal ambulacral stalk. Male. Unknown.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA3983601C7A83F70F6F96C.taxon	etymology	Etymology. The specific name of the new species is derived from its occurrence in nests of ants of the genus Lasius and Greek ΦΙΛία (philia), meaning " friendship " or " fondness ".	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA3983601C7A83F70F6F96C.taxon	diagnosis	Differential diagnosis. Cosmolaelaps lasiophilus is closely related to Cosmolaelaps vacua (Michael, 1891) sensu Evans & Till (1966), C. thysanifer Zeman, 1982, C. transvaalensis Ryke, 1963, C. robustus (Berlese, 1905), C. siberiensis Joharchi 2019 (in Joharchi et al., 2019), C. mixta (Shcherbak, 1971 b), C. pumili (Karg, 1988), C. lingua (Karg, 1987), C. sungaris (Ma, 1996) and C. shenyangensis (Bei et al., 2003) in the shape of dorsal setae, which are slightly swollen near the base and pointed at tip (knife-shaped) (see Figure 8), with all dorsal setae of the same shape and sub-equal in length (at most reaching base of following setae), except setae j 1 and Z 5. Cosmolaelaps lasiophilus differs from C. vacua by lacking spatulate setae on legs, most setae on legs conspicuously thickened and some inserted on small tubercles, while in C. vacua two spatulate setae are present on femora II and IV. Evans & Till (1966) did not provide any information about the shape of the leg setae for C. vacua, but according to the original description (Michael, 1891) of Cosmolaelaps vacua, femora II and IV bear two spatulate setae (Karg, 1981, Fig. 8 a, also illustrated this character). It differs from C. thysanifer by setae Z 5 and some opisthogastric setae thickened, versus setae Z 5 brush-like and all opisthogastric setae simple and setiform in C. thysanifer. It differs from C. sungaris and C. shenyangensis by its much smaller size of body (389 – 406 long, 256 – 265 wide), versus body size much larger in both of C. sungaris and C. shenyangensis (566 long × 383 wide in C. sungaris, and 567 long × 413 wide in shenyangensis) and also differs from C. sungaris by its longer dorsal shield setae (reaching base of following setae), versus dorsal shield setae much shorter in C. sungaris (barely reaching more than half of distance of following setae in series). Cosmolaelaps lasiophilus can be readily distinguished from C. transvaalensis by some opisthogastric setae thickened and most setae on legs conspicuously thickened (some inserted on small tubercles), versus setae on both opisthogastric cuticle and legs simple in C. transvaalensis (see Ryke, 1963). It differs from C. pumili because setae Z 5 are thickened, shorter than J 5 and legs I, IV are shorter than length of idiosoma, while in C. pumili setae Z 5 setiform, longer than J 5 and legs I, IV longer than length of idiosoma. C. lasiophilus can be easily distinguished from C. robustus by the smaller size of the genital shield (there are two pairs of setae between genital and anal shields) and presternal area lightly sclerotised (with a few transverse curved lines and merged to the sternal shield), while genital shield expanded posteriorly in C. robustus, setae Zv 1 and Jv 1 inserted on lateral margins of shield (in addition of st 5) and two triangular presternal plates present in C. robustus. Cosmolaelaps lasiophilus can be distinguished from C. lingua by its small body size (389 – 406 long, 256 – 265 wide), thick and short opisthogastric setae and presternal area lightly sclerotised (anterior margin of sternal shield hardly conspicuous), versus body larger (480 – 500 long, 300 – 330 wide), opisthogastric setae simple (setiform) and long, sclerotised platelets absent and presternal plates joined to sternal shield in C. lingua. Cosmolaelaps lasiophilus is most similar to C. siberiensis and C. mixta, but can be readily distinguished from these two species by its longer dorsal setae, some of them reach to the base of next setae, while in both C. siberiensis and C. mixta dorsal shield setae considerably shorter and none of them reach base of next. Overall C. lasiophilus can be easily distinguished from all other congeners by the following combination of characters: (1) dorsal shield bearing 39 pairs of relatively long setae (some reach base of next posterior setae in series), j 1, z 1 and Z 5 simple, Z 5 shorter than J 5 (ratio of J 5 / Z 5 length ≃ 1.5); (2) post-anal seta thickened; (3) almost all opisthogastric setae thickened and arising on minute sclerotised platelet; (4) fixed digit of chelicera with six various size of teeth; (5) legs without spatulate setae but most setae conspicuously thickened and some inserted on small tubercles.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA8983201C7AB5372D3FCC4.taxon	description	(Figures 25 – 44)	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA8983201C7AB5372D3FCC4.taxon	materials_examined	Type material. Holotype, female, on the coast of the Sea of Japan (East Sea), Sakhalin Island, Russia, 46 ° 42 ' 49.5 " N 141 ° 53 ' 14 " E, 11 August 2021, O. Joharchi coll., in the nest of Lasius flavus (Fabricius, 1782) (Hymenoptera: Formicidae) (in TUMZ). Paratypes: two females, same data as holotype (in TUMZ).	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA8983201C7AB5372D3FCC4.taxon	diagnosis	Diagnosis (adult female). Dorsal shield well reticulate, with 39 pairs of scimitar-like setae, reaching well past base of next posterior setae, Z 5 shorter than J 5 (ratio of J 5 / Z 5 ≈ 1.5); presternal area poorly sclerotised, sternal shield with lineate-reticulate ornamentation on lateral surface, bearing three pairs of long setae, extending slightly beyond of next posterior setae, ratio of shield length / width (at broadest level) ≃ 0.65; genital shield ratio of length / width (at broadest level) ≃ 1.9, shield ornamented posteromedially by seven cells flanked by a median Λ-shaped ornamentation, anal shield ratio of length / width (at broadest level) ≃ 1.2, post-anal seta thickened, sparsely barbed, apically bent (hook shaped); distance between genital and anal shields is shorter than length of anal shield, almost all opisthogastric setae well thickened (especially Jv 5, apically bent) and arising on minute sclerotised platelet, except Jv 1 – 2 and Zv 1. Fixed digit of chelicera with five teeth, including two large proximal teeth (posterior to pilus dentilis). Legs without spatulate setae but most setae conspicuously thickened and some inserted on small tubercles. Legs I and IV shorter than length of idiosoma.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA8983201C7AB5372D3FCC4.taxon	description	Description. Female (n = 3) Dorsal idiosoma (Figs 25, 30, 32, 33). Dorsal shield semi-circular, large, reticulate throughout, 498 – 512 long, 404 – 410 wide, covering entire dorsal idiosoma. Shield with 39 pairs of very long scimitar-like setae, 22 podonotal, 17 opisthonotal, including two pairs of Zx setae between J and Z setae, and three unpaired setae Jx between J 2 and J 4, setae reaching well past base of next posterior setae, mostly subequal in length (60 – 73), all dorsal setae very thick and slightly swollen at base, except j 1 (20 – 23) and z 1 (17 – 20) simple and shortest, ratio of J 5 (37 – 40) / Z 5 (22 – 25) ≈ 1.5, Z 5 sparsely barbed (Figs 25, 30, 32, 33). Dorsal shield with 23 pairs of pore-like structures, including seven pairs of gland openings (gd 1, gd 2, gd 4, gd 5, gd 6, gd 8, gd 9) and 16 pairs of poroids. Shape, position and relative length and shape of setae shown in Figures 25 and 30. Ventral idiosoma (Figs 26, 31, 34, 40). Tritosternum with paired pilose laciniae (77 – 80), fused basally (6 – 8), columnar base 27 – 29 × 15 – 17 wide; presternal area poorly sclerotised. Sternal shield (length 90 – 95) narrowest between coxae II (94 – 97), widest (143 – 147), anterior margin of shield hardly conspicuous, posterior margin distinctly concave, anterolateral corners narrowly slightly extending between coxae I – II, gland pores gvb indistinct; endopodal elements between coxae II and III fused with shield and endopodal elements III / IV relatively small, subtriangular, posteriorly not extended. Sternal shield with three pairs of subequal smooth setae (st 1 - 3) (42 – 46) and two pairs of large slit-shaped pore-like structures (iv 1 adjacent to setae st 1; iv 2 between st 2 and st 3), setae extending slightly beyond base of following setae; shield with lineate-reticulate ornamentation on lateral surface, longitudinally median part smooth (or faintly reticulated) (Figs 26, 31). Metasternal setae st 4 (42 – 44) and metasternal poroids located on soft integument; metasternal platelets absent. Genital shield flask-shaped, slightly expanded laterally past level of setae st 5, length 208 – 212, maximum width 108 – 111, posterior margin rounded, anterior hyaline margin of shield irregularly convex, overlapping posterior area of sternal shield (extending beyond base of setae st 3), surface ornamented posteromedially by seven cells flanked by a median Λ-shaped ornamentation; bearing a pair of simple setae st 5 (38 – 40) (Figs 26, 31, 34). Shield flanked by two pairs of minute, oval paragenital platelets; paragenital poroids iv 5 located on soft cuticle lateral to shield near seta st 5. Anal shield subtriangular, rounded anteriorly, length 91 – 95, width 75 – 78, anterior half faintly lineate-reticulate, bearing a pair of simple para-anal setae (23 – 26), postanal seta (30 – 32) thickened, sparsely barbed, apically bent (hook shaped) (see Figs 26, 31, 34, 40) and with a pair of marginal pores (gv 3); cribrum consisting of a terminal tuft with 3 – 4 irregular rows of spicules, anteriormost rows of spicules extending slightly beyond post-anal seta (Figs 26, 31, 34, 40). Soft opisthogastric cuticle surrounding genital and anal shields with seven pairs of poroids, including one pair of paragenital poroids iv 5, ivp and five pairs of ivo, inguinal gland pores gv 2 on soft cuticle close to parapodals and one pair of suboval metapodal plates (13 – 16 long × 8 – 10 wide) present, soft cuticle with two minute paragenital platelets between metapodals and genital shield, bearing 16 pairs of thick setae (Jv 1 – Jv 5, Zv 1 – Zv 5, R 1 – R 4, UR 2 – UR 3); almost all setae uniform in length (20 – 30), and arising on small sclerotised platelet, except Jv 1 – 2 (33 – 35) and Zv 1 (38 – 40) longer and setiform (Figs 26, 31, 34). Peritrematal shield well developed laterad peritremes, bearing one gland pore and one poroid at level near coxae II – III, post-stigmatic extension of shield relatively wide, not reaching posterior level of coxae IV, with two pairs of poroids and one pair of gland pores; anterior region of peritrematal shield fused to anterior margin of dorsal shield behind setae z 1. Peritremes long, extending to mid-level of coxa I (near id 1). Two exopodal platelets between coxae II – III and III – IV present, anterior platelet small and subtriangular, those between coxae III – IV linear, narrow, more or less abutting to parapodal more or less abutting to parapodals. Gnathosoma (Figures 27 – 29, 35, 36, 39). Anterior margin of epistome convex, irregularly denticulate, with smooth median spike, lineate posteriorly (Fig. 28). Hypostomal groove with six transverse rows of denticles, each row with 6 – 16 small denticles, except anteriormost row widest, slightly convex, with 28 – 30 small denticles, groove with smooth posterior transverse line and progressively narrowing from anterior to posterior (Figs 27, 36). Corniculi horn-like, internal malae longer than corniculi, comprising a pair of pilose median projections, and 10 – 12 lateral, shorter, tentacle-like, smooth projections (Fig. 27); labrum acuminate, longer than internal malae, fringed; hypostomal and capitular setae smooth, h 3 (48 – 51)> h 1 (36 – 39)> pc (28 – 30)> h 2 (17 – 20) (Figs 27, 36). Chaetotaxy of palps: trochanter 2, femur 5, genu 6, tibia 14, tarsus 15, all setae smooth except palpfemur with seta d 3 thickened and inserted on small tubercles, seta al thickened; palpgenu with al 1 stout, al 2 paddle-like; palp tarsal claw two-tined (Fig. 35). Supralabral process indistinct. Fixed digit of chelicera with an offset and subapical tooth (gabelzhan), followed by four teeth, including two large proximal teeth posterior to a setaceous pilus dentilis, dorsal cheliceral seta prostrate, arthrodial membrane with a rounded flap and normal filaments; cheliceral lyrifissures distinct, movable digit of chelicera bidentate (Figs 29, 39). Insemination structures. Not seen, apparently unsclerotised. Legs (Figs 41 – 44). Legs II and III short (352 – 356, 343 – 348), I and IV longer (465 – 470) (excluding pre-tarsus). Chaetotaxy normal for free-living Laelapidae (sensu Evans, 1963 a): Leg I (Fig. 41): coxa 0 - 0 / 1, 0 / 1 - 0, trochanter 1 - 1 / 1, 0 / 2 - 1 (al and ad thickened and inserted on small tubercles), femur 2 - 3 / 1, 2 / 3 - 2 (all setae on segment thickened except al 2, av, pl 1, pl 2, ad 2 and al 1, ad 1, ad 3 inserted on small tubercles, see Figures 37, 38), genu 2 - 3 / 2, 3 / 1 - 2 (all setae on segment thickened and dorsals inserted on small tubercles, see Figures 37 & 38), tibia 2 - 3 / 2, 3 / 1 - 2 (all setae on segment thickened and dorsals inserted on small tubercles, see Figures 37, 38). Leg II (Fig. 42): coxa 0 - 0 / 1, 0 / 1 - 0, trochanter 1 - 0 / 1, 0 / 2 - 1 (al thickened), femur 2 - 3 / 1, 2 / 2 - 1 (all setae on segment thickened except al 2, and ad 1, pd 1, pd 2 inserted on small tubercles, pd 2 longest), genu 2 - 3 / 1, 2 / 1 - 2 (dorsals and ventrals thickened and dorsals inserted on small tubercles), tibia 2 - 2 / 1, 2 / 1 - 2 (all setae on segment thickened except anterolaterals). Leg III (Fig. 43): coxa 0 - 0 / 1, 0 / 1 - 0, trochanter 1 - 1 / 1, 0 / 2 - 0 (al and ad thickened and inserted on small tubercles), femur 1 - 2 / 1, 1 / 0 - 1 (dorsals and anterolateral thickened, ad 1 and ad 2 inserted on small tubercle), genu 2 - 2 / 1, 2 / 1 - 1 (all setae on segment thickened), tibia: 2 - 1 / 1, 2 / 1 - 1 (all setae on segment thickened). Leg IV (Fig. 44): coxa 0 - 0 / 1, 0 / 0 - 0, trochanter 1 - 1 / 1, 0 / 2 - 0 (al and ad thickened and inserted on small tubercles), femur 1 - 2 / 1, 1 / 0 - 1 (ad 1, ad 2 thickened and inserted on small tubercles), genu 2 - 2 / 1, 3 / 0 - 1 (all setae on segment slightly thickened), tibia 2 - 1 / 1, 3 / 1 - 2 (all setae on segment slightly thickened). Tarsi II – IV with 18 setae (3 - 3 / 2, 3 / 2 - 3 + mv, md); almost all setae on tarsus II – IV thickened, see Figures 42 – 44. All pretarsi with well-developed paired claws, rounded pulvilli and normal ambulacral stalk. Male. Unknown.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFA8983201C7AB5372D3FCC4.taxon	etymology	Etymology. The specific name latisetis, from the Latin " lati - " meaning broad, thick and " setis " meaning hair, refers to the broad dorsal setae.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFAF983101C7ACCA701EFBD0.taxon	discussion	Remarks. Cosmolaelaps lutegiensis was described from Kiev, Ukraine (Shcherbak, 1971 a). It has been found from soil-litter of a pine forest and is now recorded from Russia for the first time, from the soil. Our newly collected material agrees very well with the description given by Shcherbak (1971 a). Ramroodi et al. (2014), Joharchi & Trach (2019), and Joharchi et al. (2020 a) have reported the species from Iran, Ukraine and Kazakhstan, respectively. They stated inaccurately that the dorsal shield has 38 pairs of lancet-like setae, but there are 39 pairs (including two pairs of Zx setae between J and Z setae, and three unpaired setae Jx between J 3 and J 5) as stated in the original description (see Shcherbak, 1971 a). Bregetova (1977) suspected Cosmolaelaps lutegiensis maybe a junior synonym of H. helianthi Samšiňák, 1958. We have not had the opportunity to examine the type specimens of H. helianthi in order to confirm that synonymy, but by comparing the descriptions and figures of these two species, we found some distinguishing morphological differences: (1) sternal seta st 1 is off the sternal shield in H. helianthi (see Figure 4 - 1 in Samšiňák, 1958), while in C. lutegiensis it is obviously on the shield (see Fig. 21 in Joharchi et al., 2020 a); (2) dorsal setae smooth and mostly do not reach to base of next setae in series (see Figure 5 - 1 in Samšiňák, 1958), while in C. lutegiensis all setae have a small basal protuberance and are mostly long enough to reach base of next setae in series (see Figures 20, 22 in Joharchi et al., 2020 a); (3) sternal shield with reticulate ornamentation throughout H. helianthi (see Figure 4 - 1 in Samšiňák, 1958), while in C. lutegiensis shield smooth almost throughout, except a longitudinally lateral part between iv 1 and st 3 faintly reticulated with curved lines (see Fig. 21 in Joharchi et al., 2020 a). Therefore, we believe these are two distinct species.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFAF983101C7A80E7207F942.taxon	discussion	Remarks. Sheals (1962) described Cosmolaelaps rectangularis as a new species from Patagonia, Argentina, on the basis of one female specimen collected on an unspecified substrate. Subsequently, Costa (1968) redescribed the species based on female specimens and described the male of this species for the first time from Israel. This species has been recorded from North America, Europe and Asia from soil-litter or ant nests and is now recorded in Russia for the first time, from a nest of Myrmica sp .. Our newly collected material agrees very well with the redescription given by Costa (1968). This species can be readily recognised by the 39 pairs of spatulate-mucronate-tricarinate dorsal setae.	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFAF982F01C7AAB97601FE7C.taxon	description	Specimens examined. Six females, Sakhalin Island, Russia, 46 ° 44 ' 06 " N 142 ° 12 ' 17.5 " E, 11 August 2021, O. Joharchi coll., in the nest of Lasius umbratus (Nylander) (Hymenoptera: Formicidae) (in TUMZ).	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
D25AD024FFAF982F01C7AAB97601FE7C.taxon	discussion	Remarks. Cosmolaelaps sejongi was described from Republic of Korea (Keum et al., 2017). It has been found from soil around roots of an oak tree (Keum et al., 2017), and is now recorded in Russia for the first time, in the nest of L. umbratus. Our specimens agree well with the description given by Keum et al. (2017). The species is easily recognised by the distinctive shape of the post-anal seta (thickened, sparsely barbed and apically hook shaped), which is inserted on a small tubercle (Figs 46, 49); dorsal shield setae thick and long, most setae long enough to reach well past the base of next posterior seta, and Z 5 sparsely barbed, longer and thicker than J 5 (Figs 45, 47); sternal setae short, not reaching base of following setae (Figs 46, 48); soft opisthogastric cuticle bearing 16 pairs setae, Jv 5 well thickened, apically hook shaped and subequal in length with post-anal seta (Figs 46, 49).	en	Joharchi, Omid, Döker, Ismail, Khaustov, Vladimir A. (2022): New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus. Zootaxa 5133 (4): 486-508, DOI: 10.11646/zootaxa.5133.4.2
