64 W.F. Ponder, D.J. Colgan, T. Terzis, S.A. Clark, A.C. Miller 
Figure9. Snout morphology of Dalhousia species and Fluvidona centralia. A. D. globosa, dorsal view, Spring Cal 
(station 641B). B-D. D. harrisi, Spring Ca7 (station C644). B,D, dorsal view, D, high power view of left 
labium; C, ventral view. E,F. F. centralia, paratype. Dorsal view; F, high power view of right anterior end of 
snout. ci — cilia, Ip — labial papillae. Scales A-C,E — 0.1mm, D,F — 0.05mm. 
confirmed as containing this species are listed in Table 8 (Appendix 3). 
This species lives in a wide range of habitats ranging from small cold seeps (recorded temperatures 
of down to 20°C), to large warm pools to very hot (up to 43°C) springs. It is found in all spring 
groups except the Gb subgroup. 
