A new subgenus and two new species of oribatid mites (Acari, Oribatida) from Madagascar Author Ermilov K, Sergey G. Institute of Environmental and Agricultural Biology (X-BIO), Tyumen State University, Tyumen, Russia. Author Frolov K, Andrey V. Zoological Institute of Russian Academy of Sciences, Saint Petersburg, Russia. text Acarologia 2022 2022-08-29 62 3 798 810 https://www1.montpellier.inrae.fr/CBGP/acarologia/article.php?id=4517 journal article 10.24349/eyzw-dpwh 2107-7207 Afreremella ( Arboreremella ) madagascarensis n. sp. Zoobank: 28C0F62D-8A0C-4FFD-AA96-45A97703D478 ( Figures 1–3 ) Diagnosis — Body length: 547–564. Rostral seta setiform, barbed; lamellar and interlamellar setae thick, heavily barbed; bothridial seta globular, roughened; in longest. Notogastral setae (except posterior setae) long, thick, heavily barbed. Epimeral and anogenital setae (except dilated distally, heavily barbed ad 1 , ad 2 ) setiform, slightly barbed. Adanal lyrifissure diagonal. Description of adult — Measurements – Body length: 547 ( holotype , female), 547–564 ( three paratype females ); body width: 348 ( holotype ), 348–365 ( three paratype females ). Integument – Body light brown to brown. Surface and setae partially covered by thin layer of gel-like cerotegument. Prodorsum, notogaster, subcapitular mentum, epimeral and anogenital regions, genital and anal plates areolate (diameter of areola up to 12); areolae on genital plate indistinct. Lateral part of body partially microgranulate. Antiaxial side of tarsi I–IV and tibiae I, II partially with transverse rugosities; antiaxial side of leg femora I–IV, tibiae I, II and trochanters III, IV with rounded and elongated tubercles. Prodorsum – Rostrum broadly rounded. Costula about 1/2 length of prodorsum, little not reaching transcostula. Transcostula long, laterally almost reaching tutorium. Tutorium bent mediodistally. Rostral seta (65–73) setiform, barbed, inserted on tubercle; lamellar (69–82) and interlamellar (102–114) setae thick, heavily barbed, inserted on tubercles; exobothridial seta (12–14) setiform, thin, slightly barbed; bothridial seta (32–36) globular, roughened. Notogaster – Posterior notogastral margin slightly undulate. Thirteen (in holotype and in two paratypes ) or twelve (in one paratype ; dp absent) pairs of notogastral setae; p 1 (24–28) broadly phylliform, heavily barbed; p 2 and p 3 (14–16) dilated distally, heavily barbed; others (77–86) thick, heavily barbed; all setae inserted on tubercles. Opisthonotal gland opening and all lyrifissures (except ia not observed) well visible. Gnathosoma – Subcapitulum size: 123–131 × 98–106. Subcapitular ( a , h : 20–22; m : 28–32) and adoral (10) setae setiform, thin, slightly barbed; m slightly thicker than others. Palp (length: 73–82) with typical setation: 0–2–1–3–9(+ω). Postpalpal seta (4) spiniform, smooth. Chelicera (length: 135–139) with two setiform, barbed setae cha (: 41–45; chb : 24–28). Figure 1 Afreremella ( Arboreremella ) madagascarensis n. sp. , adult: a – dorsal view (legs omitted); b – ventral view (gnathosoma and legs omitted); c – lateral view (gnathosoma and legs omitted). Scale bar 120 μm. Figure 2 Afreremella ( Arboreremella ) madagascarensis n. sp. , adult: a – posterior view; b – subcapitulum, ventral view; c – palp, right, antiaxial view; d – chelicera, left, paraxial view. Scale bars 120 μm (a), 25 μm (b–d). Epimeral and lateral podosomal regions – Epimeral setae 1 ( b : 24; 3b : 20; others: 12) setiform, thin, slightly barbed. Discidium triangular, tubercle-like distally. Anogenital region – Genital g ( 1 , g 2 : 10–12; g 3 – g 6 : 12–14), aggenital (12–14) and anal (12–14) setae, and adanal seta ad 3 (12–14) setiform, thin, slightly barbed. Adanal setae ad 1 (12–14) and ad 2 (8–12) dilated distally, heavily barbed, inserted on tubercles. Adanal lyrifissure diagonal. Legs – Median and lateral claws strong, slightly barbed on dorsal side. Proximoventral porose area on tarsi I–IV slightly visible; distoventral porose area on tibiae I–IV not observed; dorsoparaxial porose area on femora I–IV and on trochanters III, IV distinct. Formulas of leg setation and solenidia: I (1–4–3–4–20) [1–2–2], II (1–4–3–4–15) [1–1–1], III (2–2–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 1 . Solenidia φ 1 of tibia I and φ of tibia II very long, flagellate; ω 1 of tarsus I long, rod-like, coupled with seta ft″ ; ω 2 of tarsus I, φ 2 of tibia I and ω of tarsus II medium-sized, setiform; φ of tibiae III, IV and σ of genua I–III short, bacilliform, slightly bent mediodistally. Famulus short, erect, slightly swollen distally, inserted between solenidia 1 ωand ω 2 . Some setae thick, heavily barbed. Material examined — Holotype (female) and three paratypes (all females): Madagascar , Ankaratra Mt. , 19°20′32″S , 47°18′03″E , 1980 m a.s.l. , from bushes (swiping), 24.02.2022 (leg. A. V . Frolov). Type deposition — The holotype is deposited in the collection of the Zoological Institute, Russian Academy of Sciences, Saint-Petersburg , Russia ; three paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen , Russia . All specimens are preserved in 70% solution of ethanol with a drop of glycerol. Etymology — The name madagascarensis refers to the country of origin, Madagascar .