Euscorpiops Vachon, 1980

K, František, 2012, Euscorpiops thaomischi sp. n. from Vietnam and a key to species of the genus (Scorpiones: Euscorpiidae: Scorpiopinae), Euscorpius 142, pp. 1-8 : 6

Key to the species of Euscorpiops Vachon, 1980

1. External trichobothria on patella number 17.............. 2

– External trichobothria on patella number 18–21 ( Fig.

11)...……………………………….............………....... 5

2. Ventral trichobothria on patella number 7–10. ......... 3

– Ventral trichobothria on patella number 11–18…… ..…..…...... E. montanus (Karsch, 1879) ( India, Pakistan) and E. shidian Zhu et al., 2005 ( China: Yunnan)

3. Ventral trichobothria on patella number 7 …………. … E. bhutanensis (Tikader & Bastawade 1983) ( Bhutan)

– Ventral trichobothria on patella number 8–10. ..….... 4

4. Ventral trichobothria on patella number 8–9. ........... ……….. E. karschi Lourenço et al., 2005 ( China: Tibet)

– Ventral trichobothria on patella number 10………... ..……….... E. vachoni Zhu et al., 2005 ( China: Yunnan)

5. External trichobothria on patella number 20–21 (5 eb,

2 esb, 2 em, 6 est, 5–6 et). ...............……....................... …… E. binghamii (Pocock, 1893) ( Myanmar, Thailand)

– External trichobothria on patella number 18–19. ....... 6

6. est trichobothria on patella number 4 ( Fig. 11 ). ..….. 7

– est trichobothria on patella number 5. ........….......... 16

7. Chela length to width ratio lower than 2.75 .............. 8

– Chela length to width ratio higher than 2.9 ......…...... 9

8. Ventral trichobothria on patella number 9. ………... ………………....... E. sejnai ( Kovařík, 2000) ( Vietnam)

– Ventral trichobothria on patella number 10–11. …..... ………… E. puerensis Di et al., 2010 ( China: Yunnan)

9. Chela length to width ratio of adult female higher than

4 ..…………….... E. kaftani ( Kovařík, 1993) ( Vietnam)

– Chela length to width ratio of adults of both sexes lower than 3.8. ...………………………...................... 10

10. Male pedipalp fingers flexed ( Figs. 17–19 ). ..…... 12

– Male pedipalp fingers nearly or entirely straight, may be slightly undulate ( Fig. 21 ). .....……………............ 11

11. eb trichobothria on patella number 5. ..………....... E. longimanus (Pocock, 1893) ( Bangladesh, India, Myanmar) and E. yangi Zhu et al., 2007 ( China: Yunnan)

– eb trichobothria on patella number 6. ..……………..... ………...…… E. xui Sun et Zhu, 2010 ( China: Yunnan)

12. External surface of chela densely covered by minute granules ( Figs. 18–22 ). Ventral trichobothria on patella number 9–11, very rarely 12. ...................................... 13

– External surface of chela smooth, with less than 40 big rounded granules most of which form a medial carina

( Fig. 17 ). Ventral trichobothria on patella number 12 .......…........... E. beccaloniae Kovařík, 2005 ( Myanmar)

13. Sexual dimorphism expressed in shape of pedipalp fingers ( Figs. 19 and 20 ). ....…………………………. 14

– Sexual dimorphism not readily apparent, fingers flexed identically in both sexes ( Figs. 3 and 6 ). ..………….... ……………………….... E. thaomischi sp. n. ( Vietnam)

14. Pedipalp fingers in male flexed, in female nearly straight (very slightly undulate) ( Figs. 19 and 20 ). ..... 15

– Pedipalp fingers flexed in both sexes but strongly in males and only weakly in females. .................................. ……..……… E. validus Di et al., 2010 ( China: Yunnan)

15. Ventral trichobothria on patella number 8 or 9. Pectinal teeth number 5 or 6. ..……...........……................. E. asthenurus (Pocock, 1900) ( Bhutan, India, Myanmar)

– Ventral trichobothria on patella number 10, rarely 9. Pectinal teeth number 7 or 8. ........……........................ ……………… E. kubani Kovařík, 2004 (northern Laos)

16. Ventral trichobothria on patella number 11–13 .... 17

– Ventral trichobothria on patella number 7–9.…...... 18

17. Ventral trichobothria on patella number 12–13. Chela length to manus width ratio higher than 4 ....………............. E. kaftani ( Kovařík, 1993) ( Vietnam)

– Ventral trichobothria on patella number 11. Chela length to manus width ratio lower than 3.5 .......…....... ………..... E. problematicus ( Kovařík, 2000) ( Thailand)

18. Ventral trichobothria on patella number 9. ……..... …………….…. E. novaki Kovařík, 2005 ( China: Tibet)

– Ventral trichobothria on patella number 7..………..... ….. E. kamengensis Bastawade, 2006 ( India: Arunachal Pradesh)

Figures

Figures. 7–12: Euscorpiops thaomischi sp. n., female allotype, trichobothrial pattern. 7. Chela dorsal. 8. Chela external. 9. Chela ventral. 10. Patella dorsal. 11. Patella external. 12. Patella ventral.

Figures 17–22: Chela external of Euscorpiops species. 17. E. beccaloniae Kovařík, 2005, male holotype. 18. E. kubani Kovařík, 2004, male paratype. 19–20. E. asthenurus (Pocock, 1900), India, Meghalaya State, Nong Poh env., FKCP (author‘s collection). 19. Male. 20. Female. 21–22. E. longimanus (Pocock, 1893), India, Assam State, 50 km E of Tezpur, 1800 m a.s.l., FKCP. 21. Male. 22. Female.

Figures 1–6: Euscorpiops thaomischi sp. n. 1–3. Male paratype, dorsal and ventral views, and chela external. 4–6. Female allotype, dorsal and ventral views, and chela external.