Athyreacarus ovalis Khaustov & Frolov 2019, sp. nov.
Creators: name: Khaustov, Alexander A.
name: Frolov, Andrey V.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Actinedida
Athyreacaridae
Athyreacarus
Athyreacarus ovalis

description: Athyreacarus ovalis sp. nov.
(Figs 49–53)
Description. Female (Figs 49–53). Body narrowly-oval. Length of idiosoma 415 (375–425), width 260 (210– 260).
Gnathosoma. Gnathosomal capsule, excluding palps, almost oval in outline, length 62 (53–63), width 70 (59– 70). Two pairs of barbed, blunt-ended cheliceral setae cha 38 (31–38) and chb 30 (22–30). Postpalpal setae (pp) 8 (7–10) needle-like. Setae m 16 (13–17) and n 62 (57–63) pointed; setae m smooth, n weakly barbed. Setae dFe 16 (14–17) and dGe 34 (27–35) barbed; dFe blunt-ended, dGe pointed. Tibial claw small, with split tip as in A. angustus.
Idiosomal dorsum (Figs 49A, 52A, 53A, B). All dorsal shields with numerous small sparsely distributed dimples (Figs 53A, B). Hysterosomal shields D and EF narrow, not covering lateral surfaces of hysterosoma. Prodorsal shield with distinct lateral projections. Only alveoli of setae sc 1 present.All dorsal setae barbed. Setae v 2 and e bluntended, other dorsal setae pointed. Cupules and pore-like structures on hysterosomal tergites not evident. Pseudanal segment much shorter than tergite H. Lengths of dorsal setae: v 1 85 (76–91), v 2 31 (29–33), sc 2 145 (130–165), c 1 150 (115–150), c 2 160 (140–160), d 150 (130–150), e 93 (57–67), f 150 (140–160), h 1 105 (91–105), h 2 115 (100– 115). Distances between setae: v 1 – v 1 45 (35–45), v 2 –v 2 68 (58–68), sc 1 –sc 1 67 (65–68), sc 2 –sc 2 73 (70–77), c 1 – c 1 83 (82–87), c 1 – c 2 58 (57–60), d–d 87 (86–88), e–e 94 (86–96), f–f 76 (75–83), h 1 – h 1 54 (50–57), h 1 – h 2 18 (18–21).
Idiosomal venter (Figs 49B, 52B, 53C, D). All ventral plates with numerous small dimples (Fig. 53C, D). All ventral setae weakly barbed. Setae 1 b, 1 c, 2 b, 2 c, and 4 c blunt-ended, other ventral setae pointed. Ap5 long, reaching beyond bases of setae 4 a. Aggenital plate with three pairs of aggenital setae. Anal opening terminal. Length of mid-sternal plate 85 (80–86), width 49 (43–49); ratio length/width 1.7–1.9. Lengths of ventral setae: 1 a 50 (45–50), 1 b 26 (24–34), 1 c 29 (27–40), 2 a 58 (52–64), 2 b 39 (34–39), 2 c 38 (31–38), 3 a 36 (33–39), 3 b 52 (48–56), 3 c 45 (36– 4g), 4 a 43 (39–46), 4 b 62 (50–62), 4 c 36 (32–47), ag 1 72 (65–72), ag 2 87 (73–88), ag 3 79 (69–82), ps 1 68 (65–70), ps 2 84 (79–87), ps 3 58 (54–68).
Legs (Figs 50, 51). Length of legs: I 145 (135–145), II 150 (140–150), III 170 (155–170), IV 195 (185–195). Leg I (Fig. 50A): setae v’ of trochanter, v’ of femur, k of tibia, (pl), s, and pv” of tarsus smooth, other leg setae (except eupathidia) weakly barbed; setae v’ of trochanter, v’ of femur, d of genu, and k of tibia blunt-ended, other leg setae pointed; lengths of solenidia ω 1 14 (12–14), ω 2 10 (9–10), φ 1 14 (13–14), φ 2 10 (9–10); ω 1 digitiform, ω 2, φ 1 and φ 2 baculiform. Leg II (Fig. 50B): solenidion ω 12 (11–12) digitiform, solenidion φ 10 (9–10) baculiform; all leg setae barbed; setae v’ of trochanter and l’ of femur blunt-ended, other leg setae pointed. Leg III (Fig. 51A) similar in shape and length to leg II; solenidion φ 10 (9–10) baculiform; all leg setae barbed; setae tc” of tarsus weakly spatulate, other leg setae pointed. Leg IV (Fig. 51B): solenidion φ 11 (9–11) baculiform; all leg setae barbed; setae tc” and p’ of tarsus blunt-ended, other leg setae pointed; seta tc” of tarsus weakly spatulate distally.
Type material. Female holotype, slide No. ZISP T-Ath-004, MEXICO, Amoxoyahuatl, VIII.1989, J. Meha leg., on a beetle Bolbelasmus variabilis Howden. Paratype: 26 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.
Differential diagnosis. See differential diagnosis for A. angustus.
Etymology. The name of the new species derives from the Latin word “ ovalis ” meaning “ oval ” and refers to the oval shape of the body of the new species.
description: Published as part of Khaustov, Alexander A. & Frolov, Andrey V., 2019, Revision of the genus Athyreacarus (Acari: Athyreacaridae), pp. 168-225 in Zootaxa 4647 (1) on pages 211-216, DOI: 10.11646/zootaxa.4647.1.14, http://zenodo.org/record/3352927