New taxa of Athyreacaridae (Acari: Heterostigmata) from Neotropical and Afrotropical realms Author Khaustov, Alexander A. Tyumen State University, Tyumen, 6 Volodarskogo Str., 625003 Russia. Author Frolov, Andrey V. Zoological Institute of Russian Academy of Sciences, Universitetskaya Embankment 1, 199034, Saint Petersburg, Russia. afrolov @ zin. ru text Zootaxa 2022 2022-09-22 5188 6 501 520 journal article 148082 10.11646/zootaxa.5188.6.1 f600f405-52f6-49d9-b58f-a801ab142468 1175-5326 7103562 26467FAA-A7DB-41F7-B4D3-7A8A27B89242 Neoathyreacarus pygmephoroides sp. nov. ( Figs 1–6 ) Description . Female . Length of idiosoma 300 (290–320), width 170 (160–180). Gnathosoma ( Fig. 2 ). Gnathosomal capsule, excluding palps, broadly oval, length 32 (32–34), width 37 (37–46). Dorsal gnathosomal apodeme poorly visible. Two pair of barbed, blunt-tipped cheliceral setae cha 33 (28–33) and chb 10 (10–11). Postpalpal setae ( pp ) 8 (8–9) blunt-tipped, smooth. Setae m 19 (18–20) pointed and smooth. Setae dFe 16 (15–16) and dGe 22 (20–22) weakly barbed and pointed. Tibial claw slightly hooked, without projection. Cheliceral stylet length 8 (7–9). FIGURE 1 . Neoathyreacarus pygmephoroides gen., sp. nov. , female: A—dorsum of body, B—venter of body. Legs omitted. Idiosomal dorsum ( Figs 1A , 5A , 6A–C ). All dorsal shields with numerous sparsely distributed puncta ( Figs 6A– C ). Prodorsal shield without lateral projections. All dorsal setae weakly barbed; setae sc2 , c2 , d , and f pointed, other dorsal setae blunt-tipped;. Cupules ia on tergite D, im and ip on tergite EF and ih on tergite H small, round. Tergites C, D, and EF with few pore-like structures. Stigmata round. Pseudanal segment completely covered dorsally by tergite H. Lengths of dorsal setae: v1 50 (46–52), v2 20 (19–21), sc2 90 (79–90), c1 53 (46–54), c2 105 (98–105), d 110 (105–110), e 34 (31–40), f 120 (115–120), h1 88 (79–88), h 2 73 (70–77). Distances between setae: v1–v1 23 (18–24), v2–v2 58 (52–58), sc2–sc2 63 (55–63), c1–c1 70 (66–72), c1–c2 31 (27–32), d–d 83 (76–89), e–e 76 (73–80), f–f 83 (82–84), h1–h1 29 (28–36), h1–h2 25 (22–26). Idiosomal venter ( Figs 1B , 5B , 6 D–F ). All ventral plates with numerous puncta ( Figs 6D–F ). Setae 3b , 3c , 4a , 4b , and 4c smooth; other ventral setae weakly barbed. Setae 1b , 2c , 3a , ag1 and ps1-3 blunt-tipped, other ventral setae pointed; in most specimens at least one of setae ps1 and/or ps3 bifurcate, in other specimens not bifurcate; setae ps1-3 situated in one transverse row. Ap1 well developed and fused with appr; ap2 well developed and fused with appr; apsej absent; ap3 weakly developed and presented by small oval sclerites; ap4 and ap5 well developed. Aggenital plate with two pairs of aggenital setae ( Fig. 6F ). Length of mid-sternal plate 64 (63–67), width 61 (61– 65); ratio length/width 1.0. Lengths of ventral setae: 1a 25 (25–28), 1b 15 (15–16), 1c 24 (20–24), 2a 28 (27–29), 2b 28 (25–28), 2c 15 (12–20), 3a 14 (14–23), 3b 28 (27–29), 3c 26 (25–27), 4a 26 (26–27), 4b 34 (28–34), 4c 27 (25–28), ag1 15 (14–15), ag2 33 (29–33), ps1 48/53 (47–50), ps2 29 (24–41), ps3 65/76 (62–72). Legs ( Figs 3 , 4 ). Leg I ( Fig. 3A ): setae l’ , l” , v’ of femur, v’ of genu, k of tibia, and all of tarsus smooth, other leg setae barbed; seta l’ , l” , v’ of femur, v’ of genu, l” , v’ and k of tibia and ( p ), ( tc ), ( ft ) of tarsus blunt-tipped, other leg setae pointed; seta l’ of femur spiniform, situated very close to d . Lengths of solenidia ω1 15 (14–15), ω2 7 (7), φ1 10 (10–11), φ2 6 (6–7); all solenidia digitiform. Leg II ( Fig. 3B ): solenidia ω 10 (10–14) and φ 3 (3) digitiform; all leg setae weakly barbed; setae d , l’ of femur and ( pv ) of tarsus blunt-tipped, other leg setae pointed. Leg III ( Fig. 4A ) similar in shape and length to leg II; solenidion φ 3 (3–4) digitiform; all leg setae weakly barbed; setae v’ of trochanter, d of femur and ( pv ) of tarsus blunt-tipped, other leg setae pointed. Leg IV ( Fig. 4B ): solenidion φ 4 (4) digitiform; all leg setae weakly barbed; setae v’ of femur and genu blunt-tipped, other leg setae pointed. FIGURE 2 . Neoathyreacarus pygmephoroides gen., sp. nov. female: A—gnathosoma, dorsal aspect, B—gnathosoma, ventral aspect. Type material . Female holotype , slide No. ZISP T-Ath-011, Chile , Termas de Chillán , 15.I.2010 , on Bolborhinum tubericeps . Paratypes : 24 females , same data . Type deposition . The holotype and five paratypes are deposited in the collection of the Zoological Institute of RAS, Saint Petersburg , Russia ; other paratypes are deposited in the collection of the Tyumen State University Museum of Zoology , Tyumen , Russia . Etymology . The name of the new species pygmephoroides refers to its morphological (not phylogenetic) similarity to some species of the superfamily Pygmephoroidea sharing the following characters: subcapitulum with only one pair of setae, tergite C not divided into three parts, and similar position of anal opening and pseudanal setae.