A Bilateral Division of the Parietal Bone in a Chimpanzee; with a Special Reference to the Oblique Sutures in the Parietal

A Bilateral Division of the Parietal Bone in a Chimpanzee by Aleš Hrdlička is a meticulous scientific monograph that illuminates an unusual cranial anomaly and its implications for comparative anatomy. Hrdlička examines a rare bilateral division of the parietal bone, with close attention to oblique sutures and their relationship to neighboring coronal and lambdoid sutures, situating his observations within late-19th-century museum-based research. Drawing on earlier work by Johannes Ranke and examples from the Selenka collection, the study contrasts complete and incomplete parietal divisions, describes the squamous overlapping articulation, limited serration of the abnormal suture, and the characteristic forward bend of the coronal suture found in related specimens. The author also engages with taxonomic questions raised by specimen identification, reflecting the era’s evolving methods in physical anthropology and osteology. Rich in anatomical detail yet concise in scope, this audiobook offers a window into historical scientific practice and cranial morphology. Ideal for anatomists, paleoanthropologists, osteologists, and history-of-science listeners, it’s a focused, informative listen for anyone interested in comparative anatomy, museum collections, and early anthropological scholarship.