Neoathyreacarus pygmephoroides Khaustov & Frolov 2022, sp. nov.
Creators: name: Khaustov, Alexander A.
name: Frolov, Andrey V.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Athyreacaridae
Neoathyreacarus
Neoathyreacarus pygmephoroides

description: 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).
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.
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.
description: Published as part of Khaustov, Alexander A. & Frolov, Andrey V., 2022, New taxa of Athyreacaridae (Acari: Heterostigmata) from Neotropical and Afrotropical realms, pp. 501-520 in Zootaxa 5188 (6) on pages 502-504, DOI: 10.11646/zootaxa.5188.6.1, http://zenodo.org/record/7103562