Abstract This study describes the basic morphology and structure of the dermal denticle from Trygonorrhina dumerilii, and assesses its utility as an ageing structure for rhinobatids. No banding patterns were identified on the surface or in sections of enlarged dermal denticles, which may indicate that these structures are not suitable for estimating age in rhinobatids.

中文翻译：

---

Rhinobatid Trygonorrhina Dumerilii真皮小齿的检查

摘要 本研究描述了 Trygonorrhina dumerilii 真皮小齿的基本形态和结构，并评估了其作为犀牛老化结构的效用。在扩大的真皮小齿的表面或部分中没有发现条带图案，这可能表明这些结构不适合估计犀牛的年龄。