Many lizards often break their tails when encountering predators or when they are severely disturbed. The broken tails constantly beat to attract the attention of the enemy.
This phenomenon is called self-interception and can be considered as a protective adaptation to escape predators. Self-cutting can occur anywhere on the tail. However, the tail is not located at the joint between the two tail bones, but occurs at the special cartilage septum in the middle of the same vertebral body. This special transverse septum was formed during the process of ossification of the tail vertebra and was severed due to the strong contraction of the tail muscles. The cells of the cartilage across the cartilage retain the characteristics of the embryonic tissue throughout its life and can continue to differentiate. Therefore, after the tail is disconnected, a new tail can be regenerated from there. There are no sectional caudal vertebrae in the regenerating tail, but only a continuous bony rib. The arrangement and structure of the scales are also different from those of the original tail. Sometimes, the tail is not completely broken, so the cartilage cross-divides and regenerates from the injury, producing another or even two tails, forming a bifurcation. The lizards of the family Geckoidae, Lizardidae, Lizardidae, and Selaginaceidae all have self-cutting and regeneration capabilities.
This phenomenon is called self-interception and can be considered as a protective adaptation to escape predators. Self-cutting can occur anywhere on the tail. However, the tail is not located at the joint between the two tail bones, but occurs at the special cartilage septum in the middle of the same vertebral body. This special transverse septum was formed during the process of ossification of the tail vertebra and was severed due to the strong contraction of the tail muscles. The cells of the cartilage across the cartilage retain the characteristics of the embryonic tissue throughout its life and can continue to differentiate. Therefore, after the tail is disconnected, a new tail can be regenerated from there. There are no sectional caudal vertebrae in the regenerating tail, but only a continuous bony rib. The arrangement and structure of the scales are also different from those of the original tail. Sometimes, the tail is not completely broken, so the cartilage cross-divides and regenerates from the injury, producing another or even two tails, forming a bifurcation. The lizards of the family Geckoidae, Lizardidae, Lizardidae, and Selaginaceidae all have self-cutting and regeneration capabilities.
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