Kyphosis and other Variations in Soft-shelled Turtles

This audio guide walks you through a focused survey of an unusual physical trait—kyphosis, or a pronounced hump—found in several species of soft‑shelled turtles. Drawing from three museum specimens collected across the American Southwest and Midwest, the narrator describes the subtle differences in hump shape, size, and angle, comparing them to similar anomalies already documented in Asian turtles. Along the way, you’ll hear detailed explanations of the measurement techniques used to assess shell dimensions and how these data illuminate the rarity of the condition among the 37 normal turtles also examined.

The discussion also touches on the broader context of turtle morphology, noting how certain species, such as Amyda ferox, stand out for their unusually elongated carapaces. While the cause of the kyphotic deformity remains a mystery, listeners will gain a clear sense of the careful observation and comparative analysis that underpin this niche field of herpetology, all presented in an accessible, engaging style.