Monatractides xiaoxiensis Gu & Guo, 2019

Gu, Xin-Yao, Jia, Lan, Jin, Dao-Chao & Guo, Jian-Jun, 2020, Contributions to Chinese fauna of Torrenticolidae Piersig, 1902 (Acari, Hydrachnidia), with the description of three new species, ZooKeys 955, pp. 97-111 : 97

Monatractides xiaoxiensis Gu & Guo, 2019 Figure 9

Material examined.

Qingliangfeng National Nature Reserve, Lin’an, Zhejiang Province, P. R. China (30°6'12"N, 118°55'12"E, 440 m a.s.l.), female, collected by Xinyao Gu, 31-VII-2018, 3 ♀♀ (ZJ-TO-20180707 - ZJ-TO-20180709).

Morphology.

Female (n = 3): Idiosoma elliptical, L 741 (722-762), W 473 (472-491), L/W ratio 1.6 (1.5-1.6). Dorsal plate 4+1 (Fig. 9A ), dorsal shield L 631 (595-656), W 428 (413-441), dorsal plate L 567 (541-579), frontal platelets trapezoidal, L 131 (120-138), W 62 (62-74), shoulder platelets triangular, L 155 (142-155), W 76 (72-79). Infracapitular bay depth 134 (134-150); Cx-I L 269 (244-269), mL 133 (92-133), Cx-II+III mL 37 (37-42); Gf L 132 (132-151), W 116 (115-118), L/W ratio 1.1 (1.1-1.3), distance between Gf and Ap 197 (197-217); Ap away from the line of primary sclerotization, on the same line with V1 and anterior to V2 (Fig. 9B ). Gnathosoma (Fig. 9C ) vL 152 (152-173), dL 117 (113-121); claw short L 23 (19-23), chelicera bs L 159 (159-172). dL of palp segments: P-1, 23 (20-23); P-2, 52 (43-52); P-3, 34 (34-38); P-4, 44 (43-44); P-5, 15 (15-19). dL of leg segments: I-L-1-6: 66 (60-66), 71 (71-81), 76 (67-76), 97 (90-98), 97 (94-97), 92 (88-94); II-L-1-6: 63 (58-63), 80 (72-85), 68 (60-76), 93 (88-93), 107 (96-107), 109 (107-115); III-L-1-6: 54 (54-58), 93 (87-93), 71 (71-74), 99 (97-109), 127 (114-127), 117 (112-127); IV-L-1-6: 102 (99-114), 94 (88-108), 115 (109-118), 145 (133-154), 154 (151-156), 147 (135-149).

Male. Unknown.

Habitat.

Streamlet.

Remarks.

The specimens match the general morphology of Monatractides xiaoxiensis Gu & Guo, 2019, a species from China ( Gu et al. 2019b). Monatractides xiaoxiensis is characterized by: frontal platelets trapezoidal, shoulder platelets triangular; only the tip of Cx-I and Cx-II exceeding to the anterior margin of idiosoma; tips of Cx-I with an elongated cuticle extension; gnathosoma dorsal apodeme long with a blunt end, ventral apodeme pointed and bent towards dorsum; bs curved heavily towards ventrum ( Gu et al. 2019b). According to these characters, we believe our specimens from Zhejiang Province are M. xiaoxiensis . The only differences are found in V4, which is away from the line of primary sclerotization in Zhejiang specimens, but close to the line in Hunan specimens.

Distribution.

China (Hunan, Zhejiang).

Figures

Figure 9. Monatractides xiaoxiensis Gu & Guo, 2019, female A dorsal view B ventral view C infracapitulum and chelicera. Scale bars: 100 μm.