Torrenticola (Megapalpis)

Jia, Lan, Gu, Xinyao, Jin, Daochao & Guo, Jianjun, 2023, A newly recorded and a new species of torrenticolid mites (Acari: Hydrachnidiae) from China, Zoological Systematics 48 (1), pp. 100-105 : 104-105

publication ID

https://doi.org/ 10.11865/zs.2023102

publication LSID

lsid:zoobank.org:pub:A81F0976-56C4-482A-B540-41A938132DAA

persistent identifier

https://treatment.plazi.org/id/038F3F6D-FFE5-FF99-6DC5-FEA5FB6E297B

treatment provided by

Felipe

scientific name

Torrenticola (Megapalpis)
status

 

Torrenticola (Megapalpis) distans K.O. Viets, 1981 ( Figs 3–4 View Figure 3 View Figure 4 )

Description. Male (n = 1). Idiosoma elliptical, and flattened, L 765, W 487, L/W ratio 1.6 ( Fig. 3A View Figure 3 ). Dorsal shied L 689, W 415, L/W ratio 1.7; frontal platelet proximately rectangular, L 114, W 61, L/W ratio 1.8; shoulder platelets approximately triangular, L 225, W 76, L/W ratio 3.0 ( Fig. 3A View Figure 3 ). Infracapitular bay U-shaped, deep and wide, L 213. Cx-I L 339, mL 126, Cx-II–III mL 114. Gf small and rectangular, L 129, W 110, L/W ratio 1.2. E 4 aligned with acetabula pair III ( Fig. 3B View Figure 3 ); distance between Gf and Ap 194. Cx-IV trailing edge pronounced, V 1 anterior to trailing edge of Cx-IV, V 2 located on the trailing edge of Cx-IV, V 2 almost at same level of Ap ( Fig. 3B View Figure 3 ). Gnathosoma dL 238, vL 320, claw L 160, chelicera bs L 290, ventral processes almost absent, dorsal processes short and slightly pointed at end, rostrum long and curved upwards, and with fine setae at end ( Fig. 3D View Figure 3 ). Palp ( Fig. 3C View Figure 3 ): P-1 with one short dorsal seta; P-2 with four short dorsal setae, one ventral seta on the upper middle of processes; P-3 with one seta on middle of dorsum, one ventral seta; both P-2 and P-3 without ventral processes; P-4 slender, with one slender dorsal seta, ventral surface with two extensions, each of them with a slender seta. L of palp segments ( Fig. 3C View Figure 3 ): P-1, 42; P-2, 152; P-3, 67; P-4, 143; P-5, 32. L of legs ( Figs 3E–F View Figure 3 ): I-L-1–6: 85, 152, 164, 173, 182, 148; IV-L-1–6: 158, 182, 165, 206, 251, 217.

Female (n = 1). Body features same as male except: Idiosoma L 906, W 594, L/W ratio 1.5 ( Fig. 4A View Figure 4 ). Dorsal shield L 803, dorsal plate L 750, W 495, L/W ratio 1.5. Frontal platelets L 137, W 68, L/W ratio 2.0. Shoulder platelets L 225, W 76, L/W ratio 3.0 ( Fig. 4A View Figure 4 ). Infracapitular bay L 213. Cx-I L 304, mL 110, Cx-II–III mL short, L 19. Gf L 209, W 175, L/W ratio 1.2 ( Fig. 4B View Figure 4 ). Distance between Gf and Ap 266. E 4 aligned with acetabula pair V. Ap located at posterior edge ofsecondary ossification line; Gnathosoma vL 398, dL 285, chelicera bs L 294, claw L 186 ( Fig. 4D View Figure 4 ). L of palp segments ( Fig. 4C View Figure 4 ): P-1, 44; P-2, 19; P-3, 91; P-4, 175; P-5, 38. L of legs: I-L-3-6: 148-167-198-145.

Material examined. 1♂ 1♀, No. JX-TO-2009080401—02, Huangbitan River , Wuyishan National Nature Reserve , Yanshan, Shangrao, Jiangxi, China (27°50′53′′N, 117°43′43′′E, elev. 916 m), 4.VIII.2009, coll. Hao Zhong. GoogleMaps

Habitat. Streams, running water, with mayflies, small fish and no water plants.

Distribution. China (Jiangxi), South Africa (K.O. Viets 1981).

Remarks. The species is recorded in China for the first time. The population in China is almost identical to the South African population (Viets, 1981) except P-2 with four/three dorsal setae in male/female rather than only one dorsal seta as the drawing of the South African specimen.

Funding This research was supported by SRT program of Guizhou University ((2019) 337), National Natural Science Foundation of China (31772421) and Guizhou Provincial Science and Technology Projects (Qiankehe Pingtai Rencai-GCC [2022]029-1) .

Acknowledgements Special thanks are given to Hao Zhong (Institute of Entomology, Guizhou University, China) and Xu Zhang (College of Life Sciences, Huaibei Normal University, China) for the collections of the specimens.

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