Abstract

Here we determine the individual age of a basal mosasaur (subfamily Halisaurinae) using zygapophyseal skeletochronology. This study is based on the cervical vertebra from the Late Cretaceous Beloe Ozero locality (Saratov Region). By of counting the zygapophyseal growth rings on the right prezygapophysis, it has been revealed that the age of the animal to which this vertebra belonged was at least 11 years. The absence of drastic reduction in the distance between the zygapophyseal growth rings is indicative of the fact that in the first 11 years of life, until the moment of death, the animal grew rapidly and evenly and reached a length of about 6 meters.

中文翻译：

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Zygapophyseal 骨骼年代学在萨拉托夫地区坎帕尼亚基础 Mosasauroid (Squamata, Mosasauridae) 个体年龄测定中的应用

摘要

在这里，我们使用 zygapophyseal 骨骼年代学确定基础 mosasaur（亚科 Halisaurinae）的个体年龄。本研究基于白垩纪晚期 Beloe Ozero 地区（萨拉托夫地区）的颈椎。通过计算右侧关节突前的关节突生长环，可以发现这块椎骨所属的动物的年龄至少为11岁。关节突生长环之间的距离没有急剧减少，这表明在生命的前 11 年中，直到死亡的那一刻，动物迅速而均匀地生长，并达到了约 6 米的长度。