The Baculum in Microtine Rodents

Delving into the hidden world of vole anatomy, this study takes listeners on a close‑up tour of the baculum—a small yet surprisingly informative bone found in many micro‑tine rodents. By weaving together decades of earlier observations with fresh examinations, the narrator explains how the shape and ossification patterns of this structure can illuminate relationships within and between species. Along the way, listeners gain a clear picture of the bone’s orientation, its connection to surrounding tissues, and why it preserves so well in museum specimens.

The work continues with a comparative journey across dozens of vole and lemming species, illustrated by nearly fifty detailed figures that bring each variation to life. It reveals how differences in stalk length, curvature, and the three terminal processes serve as clues to evolutionary history, while also highlighting the practical methods used to collect and study these delicate specimens. By the end, listeners will appreciate how a single, modest bone can unlock a broader understanding of rodent diversity and taxonomy.