FIGURE 2. Drawings of mandibular dentitions of representatives of Palaeocastor or Capacikala and Capatanka. 2.1) Palaeocastor UCMP 65195; 2.2) Palaeocastor or Capacikala SDSM 5437; 2.3) Palaeocastor or Capacikala SDSM 5438; 2.4) Palaeocastor sp. SDSM 5475; 2.5) Palaeocastor sp. SDSM 55115; 2.6) Palaeocastor sp. SDSM 62431; 2.7) Palaeocastor nebrascensis UCMP 114451; 2.8) Palaeocastor nebrascensis UCMP 114461; 2.9) Palaeocastor sp. SDSM 54235; 2.10) Capatanka sp. SDSM 5672. Scale bar = 5 mm.