Sacral regions of the basal varanopid <i>Archaeovenator hamiltonensis</i> (KUVP 12483) and the varanodontine <i>Varanodon agilis</i> (FMNH UR 986).

<p>A: Sacral region of KUVP 12483 and reconstruction of the sacral vertebrae (inset). B: Sacral region of FMNH UR 986 and reconstruction of the sacral vertebrae (inset). <i>Abbreviations</i>: ca1, first caudal vertebra; cr1, first caudal rib; ns, neural spine; s1–2, sacral vertebrae 1–2; sr1–2, sacral ribs 1–2; prz, prezygapophysis of first sacral vertebra; psz, postzygapophysis of first sacral vertebra.