Atractides (Atractides) fodingensis Zhang & Guo 2025, sp. nov.
Creators: name: Zhang, Yu-Hao
name: Li, Hai-Tao
name: Hu, Zhan-Yu
name: Guo, Jian-Jun
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Hygrobatidae
Atractides
Atractides fodingensis

description: Atractides (Atractides) fodingensis Zhang & Guo sp. nov.
urn:lsid:zoobank.org:act: 00A65086-590B-431B-AB50-F7C9A01B8CA8
Figs 16–18
Diagnosis
The apodemes of ACG almost transverse. Pregenital sclerite relatively large, V 1 separated fro V 2, V 3 at same level of pregenital sclerite and near Cx-IV, excretory pore smooth. P-4 with straight ventral margin and two ventral hairs dividing it in 2:1:2, sword seta at same level of distoventral hair.
Etymology
The new species is named after the Foding Mountain, where the specimens were collected.
Type material
Holotype P.R. CHINA • ♀; Guizhou Province, Tongren City, Foding Mountain; 27.3113° N, 108.1363° E; 693 m a.s.l.; 19 Jun. 2023; Ri-Xin Jiang, Ping Li and Lan Jia leg.; waterfall in the mountain, with fast running water, and many plants along the shore; slide no. GZ-HY-2023061901; GUGC.
Paratype P.R. CHINA • 1 ♀; same data as for holotype; slide no. GZ-HY-2023061902; GUGC.
Description
Female (n = 2)
Idiosoma soft and oval, frontal edge slightly concave; O 1 between A 1 and A 2, O 2 between D 1 and slightly front of D 1; all slit organs visible, So 1 near A 2, So 2 at the middle of L 1 and L 2, So 3 at same level of D 2, So 4
near L 4, So 5 behind of D 4 (Figs 16A, 18A). ACG fused and with suture line, apodemes of ACG almost transverse; PCG separated. Pregenital sclerite relatively large, three pairs of acetabula in weakly curved line, Ac3 largest. V 1 separated from V 2, V 3 at same level of pregenital sclerite and near Cx-IV, V 4 at horizontal line between Ac1 and Ac2, V 3 and V 4 forming trapezoid; excretory pore smooth and between V 2 (Figs 16B, 18B).
Palp five-segmented; P-1 short, P-2 and P-3 without projection, P-4 with straight ventral margin and two ventral hairs, dividing P- 4 in 2:1:2, sword seta at same level of distoventral hair (Fig. 16C). Ventral margin of I-L-5 as long as dorsal margin, S-1 close to S-2, S-2 longer and thicker than S-1, ventrally curved whip-like seta at end of I-L-5, and near dorsal slide; I-L-6 stout, thick at its base, tapering towards end (Fig. 17).
MEASUREMENTS (measurements of paratypes in parantheses). Idiosoma L 495 (443), W 408 (368); coxal field L 295 (264), Cx-III W 252 (289), ACG IL 161 (179), mL 104 (116), W 210 (226); gnathosoma bay L 80 (86); gonopore L 95 (95), pregenital sclerite L 76 (65), postgenital sclerite L 37 (30); Ac1–3 L 31 (33), 23 (31), 29 (34); chelicera L 125 (114), cheliceral claw L 37 (39), basal segment L 94 (96); gnathosoma L 107 (131); palp dL: P-1 22 (25), P-2 46 (49), P-3 54 (59), P-4 57 (63), P-5 23 (23); leg segments: I-L-1 dL 42 (49), I-L-2 dL 60 (68), I-L-3 dL 78 (83), I-L-4 dL 106 (113), I-L-5 dL 117 (124), HB 31 (35), I-L-6 dL 61 (62), HB 12 (14), S-1 L 46 (53), W 6 (8), S-2 L 51 (51), W 7 (12); dL: II-L-1 40 (45), II-L-2 50 (56), II-L-3 62 (66), II-L-4 81 (85), II-L-5 84 (96), II-L-6 83 (88); dL: III-L-1 44 (44), III-L-2 60 (65), III-L-3 69 (76), III-L-4 97 (111), III-L-5 102 (112), III-L-6 90 (105); dL: IV-L-1 85 (93), IV-L-2 79 (78), IV-L-3 110 (117), IV-L-4 129 (137), IV-L-5 132 (143), IV-L-6 115 (130).
Remarks
This new species is similar to Atractides (Atractides) cardiacus Zhang & Guo sp. nov. in the following characters: (1) V 1 separated from V 2; (2) excretory pore smooth; (3) I-L-6 stout, thick at its base, tapering towards the end. However, the new species differs from A. (A.) cardiacus in the following aspects: (1) sword seta of P-4 at the same level of distoventral hair in the new species, but at the same level of proximoventral hair in A (A.) cardiacus; (2) ACG and PCG occupy half of the venter in the new species, but ACG and PCG of the female A (A.) cardiacus occupy one third of the ventral view; (3) excretory pore between V 2 in the new species, but slightly behind the parallel line of V 2 in the female A (A.) cardiacus.
description: Published as part of Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu & Guo, Jian-Jun, 2025, Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China, pp. 47-76 in European Journal of Taxonomy 976 on pages 62-65, DOI: 10.5852/ejt.2025.976.2775, http://zenodo.org/record/14771799