Torrenticola dentifera Wiles, 1991

Gu, Xin-Yao, Jin, Dao-Chao & Guo, Jian-Jun, 2020, Three new species and one new record of Torrenticolidae (Acari, Hydrachnidia) from Wuyishan with an updated key for Chinese fauna, European Journal of Taxonomy 625, pp. 1-23 : 16-20

Torrenticola dentifera Wiles, 1991

Figs 13–16

Material examined

China • 1 ♂, 1 ♀; Wuyishan ; 27°45′24″ N, 117°41′20″ E, 710 m a.s.l.; 6 Aug. 2018; X.Y. Gu leg.; FJ-TO-20180806 to FJ-TO-20180807 .

Description

Male (n = 1)

BODY. Idiosoma elliptical, L/W ratio 1.7 ( Fig. 13A ). Dorsal plate arrangement: 4+1. Infracapitular bay V-shaped, Cx-II–III mL relatively long; L 4 on same line with 2 nd pair of acetabula; E 4 on same line with 5 th pair of acetabula; V 1, V 2 anterior to Ap ( Fig. 13B ). Gnathosoma dorsal apodeme short, ventral apodeme long and blunt, ventral edge of infracapitulum flat. Basal part of gnathosoma very long ( Fig. 13D ). Palp: P-1 short, with one dorsal seta; P-2 with four dorsal setae and one ventral seta at base of ventrodistal extension, which is long and finely serrated; P-3 with two dorsal setae and one ventral seta on serrated ventral extension; P-4 with one dorsal seta and two sharp ventral extensions, bearing three setae ( Fig. 13C ). Legs I–IV as shown in Fig. 14 A–D: claw of Leg-I damaged.

MEASUREMENTS. Idiosoma L 584, W 338; dorsal shield L 480, W 300, dorsal plate L 425, frontal platelets L 115, shoulder platelets L 143. Infracapitular bay L 119; Cx-I L 166, mL 74, Cx-II–III mL 92; Gf L 105, W 92, distance between Gf and Ap 144. Gnathosoma vL 240, dL 202, chelicera bs L 222, claw L

29. Ejaculatory complex ( Fig. 14E ), L 140, aL 91. L of palp: P-1, 23; P-2, 63; P-3, 47; P-4, 86; P-5, 13. L of leg segments: I-L-1–6: 23, 46, 51, 67, 75, 86; II-L-1–6: 24, 57, 43, 57, 61, 73; III-L-1–6: 33, 57, 48, 69, 72, 82; IV-L-1–6: 88, 72, 81, 96, 101, 93.

Female (n = 1)

BODY. Body features same as male except: L 4 on the same line with 3 rd pair of acetabula. Legs I–IV as shown in Fig. 16 A–D: claw of Leg-III damaged.

MEASUREMENTS. Idiosoma L 602, W 371. Dorsal shield L 483, W 320, dorsal plate L 437, frontal platelets L 116, shoulder platelets L 147. Infracapitular bay depth 120; Cx-I L 160, mL 68, Cx-II–III mL 91. Gf L 128, W 111, distance between Gf and Ap 154. Gnathosoma vL 256, dL 214, chelicera bs L 243, claw L 33. L of palp: P-1, 22; P-2, 66; P-3, 48; P-4, 81; P-5, 13. L of leg segments: I-L-1–6: 25, 55, 51, 67, 79, 85; II-L-1–6: 25, 49, 50, 58, 64, 75; III-L-1–6: 27, 58, 51, 72, 80, 77; IV-L-1–6: 91, 74, 85, 102, 101, 99.

Distribution

Malaysia ( Wiles 1991, 1997), Korea ( Pešić et al. 2013), China (new record).

Habitat

Streamlet.

Remarks

The Chinese specimens well fit with the original description of Torrenticola dentifera Wiles, 1991 , described from Malaysia ( Wiles 1991), and later reported from Korea ( Pešić et al. 2013). The only

difference is the specimens from Malaysia and Korea have one large blunt spine at dorsodistal extremity of P-4, but absent in Chinese specimens.

Figures

Fig. 13. Torrenticola dentifera Wiles, 1991, ♂ (FJ-TO-20180806). A. Dorsal view. B. Ventral view. C. Palp, lateral view. D. Infracapitulum and chelicera. Scale bars = 100 μm.

Fig. 14. Torrenticola dentifera Wiles, 1991, ♂, (FJ-TO-20180806). A. leg-I. B. leg-II. C. leg-III. D. leg- IV. E. Ejaculatory complex. Scale bar = 100 μm.

Fig. 15. Torrenticola dentifera Wiles, 1991, ♀, (FJ-TO-20180807). A. Dorsal view. B. Ventral view. C. Palp, lateral view. D. Infracapitulum and chelicera. Scale bars = 100 μm.

Fig. 16. Torrenticola dentifera Wiles, 1991, ♀, (FJ-TO-20180807). A. leg-I. B. leg-II. C. leg-III. D. leg- IV. Scale bar = 100 μm.