FIGURE 1. Map of Mongolia, showing the location of the working area in the Valley of Lakes (Modified from Map of Mongolia by Cartography Co. Ltd, Ulan Bator, Mongolia).
FIGURE 2. Dental terminology of the upper and lower cheek teeth of Yindirtemys deflexus. Terminology after Vianey-Liaud et al. (2006) and Wang (1997). Illustration modified from Schmidt-Kittler et al. (2007).
FIGURE 3. Stratigraphic ranges of the Yindirtemys species from the Valley of Lakes (Mongolia). Stratigraphic chart (modified from Daxner-Höck et al., 2015) including the geological time scale (Gradstein et al., 2004), basalt ages and Mongolian biozones A - D (Höck et al., 1999), the lower boundary of the Xiejian Chinese Mammal Age after Meng et al. (2006).
FIGURE 4. Upper molars of Yindirtemys deflexus from the Valley of Lakes (Mongolia). Nos. 1-18. From Loh: 1) LOH-C/1-NHMW 2006./0083/0002 P4-M3 left; 2) LOH-C/1-NHMW 2006/0083/0007 M3 right. From Del: 3) DEL-B/12-NHMW 2006/0089/0006 M2 right; 4) DEL-B/12-NHMW 2006/0089/0033 M1 left. From Huch Teeg: 5) RHN-A/7-NHMW 2006/0090/0009 M3 right; 6) RHN-A/7-NHMW 2006/0090/0010 M3 left; 7) RHN-A/7-NHMW 2006/0090/0012 M3 left; 8) RHN-A/7-NHMW 2006/0090/0015 DP4 right; 9) RHN-A/7-NHMW 2006/0090/0039 P4 left; 10) RHN-A/7-NHMW 2006/0090/0045 P4 right; 11) RHN-A/7-NHMW 2006/0090/0047 P4 right; 12) RHN-A/7-NHMW 2006/0090/0052 M3 right; 13) RHN-A/7-NHMW 2006/0090/0053 M2 right. From Toglorhoi: 14) TGW-A/surface -NHMW 2006/0086/0005 Complete maxilla. From Tatal Gol: 15) TAT-043-NHMW 2012/0034/0005 M2-M3 right. From Huch Teeg: 16) RHN-023-NHMW 2012/0038/0014 M1 right. From Hotuliin Teeg: 17) HTSE-009+013-NHMW 2012/0039/0015 M2-M3 right; 18) HTE-057-NHMW 2012/0045/0002 DP4 left. All teeth same magnification. Scale bar equals 1 mm.
FIGURE 5. Lower molars of Yindirtemys deflexus from the Valley of Lakes (Mongolia). Nos. 1-21. From Loh: 1) LOH-C/1-NHMW 2006/0083/0015 dp4 right. From Ikh Argalatyn Nuru: 2) IKH-A/5-NHMW 2009/0148/0011 m1 left. From Del: 3) DEL-B/12-NHMW 2006/0089/0001 m2-m3 left; 4) DEL-B/12-NHMW 2006/0089/0002 m3 right; 5) DEL-B/12-NHMW 2006/0089/0018 p4 right; 6) DEL-B/12-NHMW 2006./0089/0025 m2 left; 7) DEL-B/12-NHMW 2006/0089/00027 m3 left; 8) DEL-B/12-NHMW 2006/0089/0029 m3 left; 9) DEL-B/12-NHMW 2006/0089/0041 m3 right. From Huch Teeg: 10) RHN-A/7-NHMW 2006/0090/0001 p4-m3 left; 11) RHN-A/7-NHMW 2006/0090/0004 dp4 left; 12) RHN-A/7-NHMW 2006/0090/0005 p4 left; 13) RHN-A/7-NHMW 2006/0090/0019 p4 right; 14) RHN-A/7-NHMW 2006/0090/0021 dp4 right; 15) RHN-A/7- NHMW 2006/0090/0031 m2 right; 16) RHN-A/7- NHMW 2006/0090/0032 m3 right; 17) RHN-A/7-NHMW 2006/0090/0037 m2-m3 left. From Tatal Gol: 18) TAT-051/2-NHMW 2012/0035/0005 m1 right. From Huch Teeg: 19) RHN-023-NHMW 2012/0038/0023 m2 left; 20) RHN-023-NHMW 2012/0038/0027 m1 right. From Hotuliin Teeg: 21) HTSE-009+013-NHMW 2012/0039/0020 m1 left. All teeth same magnification. Scale bar: 1 mm.
FIGURE 6. Yindirtemys suni from the Valley of Lakes (Mongolia). Nos. 1-12. From Hotuliin Teeg (south): 1) HTS-056/3-NHMW 2012/0047/0001 M2-M3 right. From Unkheltseg: 2) UNCH-A/4-NHMW 2006/0088/0001 dp4 right; 3) UNCH-A/4-NHMW 2006/0088/0003 M1 left. From Hotuliin Teeg (east): 4) HTE-009-NHMW2012/0033/0009 m3 left; 5) HTE-008-NHMW 2012/0032/0004 p4 right; 6) HTE-008-NHMW 2012/0032/0005 m2 right; 7) HTE-008-NHMW 2012/0032/0006 m3 left; 8) HTE-014-018-NHMW 2012/0031/0001 P4-M2 right; 9) HTE-014-018-NHMW 2012/0031/0002 M2 right; 10) HTE-014-018-NHMW 2012/0031/0003 M3 right; 11) HTE-014-018-NHMW 2012/0031/0006 M3 left; 12) HTE-014-018-NHMW 2012/0031/0009 m1-m3 left. All teeth same magnification. Scale bar equals 1 mm.
FIGURE 7. Complete maxilla of Yindirtemys birgeri from the locality of Tatal Gol (TAT-051/2- NHMW 2012/0060/0001) in the Valley of Lakes (Mongolia). Nos. 1-8. 1) P4 left; 2) M1 left; 3) M2 left; 4) M3 left; 5) P4 right; 6) M1 right; 7) M2 right; 8) M3 right. All teeth same magnification. Scale bar equals 1 mm.
FIGURE 8. Distribution of the length and width ranges charts of the upper and lower dental elements for the three large-sized species of Yindirtemys from the Valley of Lakes.
