Figure 1

Sampling sites in the Sultanate of Oman (a) and a detailed map of the Al Hoota Cave system and the adjacent areas (b). Wadi Mansah, WM; Wadi Hat, HT; Wadi Bani Awf1, WA1; Wadi Bani Awf2, WA2; Wadi Bani Khalid, BK; Al Hoota Cave, AH; Wadi Al Falahi, WF; Ain Al Msalla, AM; Wadi An Nakhar, WN; Wadi Bani Habib, BH; Hamra Al Falaj, HF; Wadi Misfat, MI; Wadi Dhum, WD. The colour codes are the same as in Figure 4. The white rectangular in the insert shows the location of the area in a map of the Arabian Peninsula. In the detailed map the sampling sites Al Hoota Cave (red), Wadi Al Fallahi (orange) and Ain Al Msalla (yellow) are depicted.