## 2 Materials and Methods
115); (**4–10**) _Bifarina bohemica_ (**4–6**. 110; **7**. 112; **8**, **9**. 107; **10**. 103); (**11**) _Bifarina_ sp. (112); (**12**, **13**) _Pseudoguemblina costulata_ (112; 103); (**14**, **15**) _Eouvigerina aculeata_ (107); (**16**, **29**, **30**) _Heterohelix striata_ ([PERSON], 1840) (107; 110; 115); (**17**, **18**) _Pseudotextularia_ sp. (110; 112); (**19**) _Pseudotextularia_ punctulata_ (112); (**20**–22**) _Bifarina bohemica_ (**20**, **21**. 112; **22**. 102; (**23**, **24**) _Heterohelix carinata_ (107; 110); (**25**) _Pseudoguemblina costellifera_ (115); (**26**, **27**) _Laeviheterohelix dentata_ (115); (**28**) _Laeviheterohelix pultra_ (115); (**31**–34**) _Heterohelix reussi_ (115); (**35**) _Planoglobulin carseyae_ (115); (**36**, **37**) _Bifarina bohemica_ (115); (**38**–40**) _Heterohelix punctulata_ (115); (**41**, **42**) _Gublernia acuta_ (115; 110). White scale bar = 50 \(\mu\)m.  
Figure 6: Trochospiral planktonic foraminifera from Zhangguo section of Rilang, Gyangze County, southern Tibet of China. (**1**–**6**) _Globotruncanita stuarti_**(1. 112; **2**: 109; **3**–**5**: 115; **6**: 109); (**7**) _Globotruncana bulloides_ (110); (**8**–**10**) _Globotruncana ventricosa_ (109; 112; 112); (**11**–**14**) _Globotruncanita elevata_ (109; 110; 109; 110); (**15**, **16**) _Globotruncanita stuartiformis_ (110); (**17**, **18**) _Globotruncanita atlantica_ (110; 109); (**19**–**21**) _Globotruncanita stuarti_ (110); (**22**, **23**) _Globotruncanita_ sp. (110); (**24**, **25**) _Globotruncanita cf. stuartiformis_ (109; 100); (**26**–**32**) _Radotruncana calcarata_ (**26**–**30**) _110; **31**, **32**. 109); (**33**–**40**) _Archaeglobigerina blowi_ (112). White scale bar = 100 \(\upmu\)m.  
Figure 7: Trochospiral planktonic foraminifera from Zhangguo section of Rilang, Gyangze County, southern Tibet of China. (**1**) _Dicarinella asymetrica_ (37); **(2–4)** _Schakoina multispinata_ (110; 103; 103); (**5**) _Globtruncana limeiana tricarinata_ (103); **(6–8)** _Globtruncana arca_ (103; 109; 109); (**9**, **10**) _Globtruncana lux inuris_ (109); **(11)** _Globtruncana laparenati_ (109); **(12**, **13**) _Globtruncanita pettersi_ (109); **(14**, **15**) _Globtruncana_ cf. _falsstuuri_ (110); **(16–19)** _Globtruncana hilli_ (110; 107; 109; 110); (**20**, **21**) _Globtruncana orientalis_ (109); **(22–24)** _Globtruncana arca_ (**22**, **23**, 109; **24**, 110); **(25–27)** _Globtruncana lapparenti_ (109); **(28)** _Globtruncana cf. hilli_ (110); **(29)** _Cnutocurancana fornicata_ (110); **(30)** _Rugortuncana subcircumndifer_ (109); **(31)** _Globtruncana atlantica_ (110); **(33)** _Gontuscurancana fornicata_ (110); **(35)** _Cnutocurancana patelliformis_ (100); **(36–38)** _Cnutocurancana placata_ (110); **(39)** _Cnutocurancana plummerne_ (110); **(40)** _Radotruncana calcarata_ (109). White scale bar = 100 μm. Figure 8: Trochospiral planktonic foraminifera from the Zhangguo section of Rilang, Gyangze County, southern Tibet of China. (**1–3**) _Radotruncana calcarata_ (109); (**4**) _Globtruncanita elevata_ ([PERSON], 1934) (110); (**5**) _Globtruncanita stuariformis_ ([PERSON], 1955) (109); (**6**) _Globtruncanita stuarti_ ([PERSON], 1918) (109); (**7–9**) _Globtruncana falsosuarti_ [PERSON], 1952 (109); (**10–19**) _Globtruncana arca_ ([PERSON], 1926) (109); (**20, 21**) _Rugotruncana subcircumndifer_ ([PERSON], 1955) (109); (**22–24**) _Contusotruncana_ sp. [PERSON], 1982 (110; 110; 107). (**25**) _Ruggolbigerina rugosa_ ([PERSON], 1926) (109); (**26**) _Rugtoruncana subcircumndifer_ ([PERSON], 1955) (109); (**27**) _Globtruncana_ ccf. _conica_ ([PERSON], 1928) (109); (**28–30**) _Murichodbergella holndelensis_ [PERSON], 1964 (110); (**31–33**) _Ruggolbigerina penny_ [PERSON] (110); (**34, 35**) _Rugotruncana tilevi_ [PERSON] and [PERSON], 1956 (110); (**36–38**) _Ruggolbigerina rugosa_ ([PERSON], 1926) (112). (**39, 40**) _Ruggolbigerina pennyi_ [PERSON]. (112).