Scorpiops, Peters, Euscorpiops Vachon, and Chaerilus Simon, 1861

Di, Zhi-Yong, He, Ya-Wen, Cao, Zhi-Jian, Wu, Ying-Liang & Li, Wen-Xin, 2011, The first record of the family Euscorpiidae (Arachnida: Scorpiones) from Central China, with a key of Chinese species of the genus Scorpiops, Euscorpius 118 (118), pp. 1-9 : 7

Key to species of Scorpiops from China

1. Fingers of pedipalps are straight or only slightly flexed in both sexes …………………………………...…… 2

- Fingers of pedipalps are flexed (curved) in both sexes .......…...…………………................................ 3

2. Ventral trichobothria on patella number 6 (7 rarely), total length 30–42.1mm, pectinal teeth number 4–5, chela length to width ratio about 2.2 ........... S. jendeki

- Ventral trichobothria on patella number 7, total length 40–58 mm, pectinal teeth number 7–9, chela length to width ratio about 3.3–3.5 ………..……. S. leptochirus

3. Male chela length to width ratio about 1.8–2.2; the manus with same or very similar length and width, fingers of pedipalps are very strongly flexed in the male. Ventral trichobothria on patella number 6–8 ...... S. hardwickii “complex” (including S. hardwickii , S. langxian and S. pococki )

- Manus length to width ratio visibly higher than 1 ….. 4

4. Total length more than 65 mm …………...………… 5

- Total length less than 65 mm …….….…………..…... 6

5. Mostly yellowish to yellow in adults, ventral patella of pedipalps with 9 trichobothria ...………........ S. luridus

- Mostly red brown in adults, ventral patella of pedipalps with 7 (rarely 6 or 8) trichobothria ……….. S. petersii

6. Dorsally flat manus of pedipalps and chela of both sexes with length/width ratio: 2.1–2.2 (mean about 2.1 in males and 2.2 in females), total length 40.0–50.0 mm in adults ...………....................... S. margerisonae

- Dorsally round manus of pedipalps or at least the chela of one sex with length to width ratio higher than 2.2 or total length higher than 50 mm ....…….....….............. 7

7. Total length more than 40 mm .......……...................... 8

- Total length less than 50 mm, chela strong, with length/width ratio: 2.0 in male and 2.5 in female.………………………..… ……….. S. tibetanus

8. Chela of pedipalp length to width ratio about 2.6–3.0, dorsal surface of chela of pedipalp coarse …. S. lhasa

- Chela of pedipalp length to width ratio lower than 2.5, dorsal surface of chela of pedipalp smooth with luster ………..…………............................ S. atomatus