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A white-headed dwarf gecko with tail lost due to autotomy. Autotomy (from the Greek auto-, "self-" and tome, "severing", αὐτοτομία) or 'self-amputation', is the behaviour whereby an animal sheds or discards an appendage, [1] usually as a self-defense mechanism to elude a predator's grasp or to distract the predator and thereby allow escape.
The ability and degree of regeneration in reptiles differs among the various species (see [111]), but the most notable and well-studied occurrence is tail-regeneration in lizards. [112] [113] [114] In addition to lizards, regeneration has been observed in the tails and maxillary bone of crocodiles and adult neurogenesis has also been noted.
In spring where there is no breeding, ctenophorus caudicinctus has more sodium and potassium in their plasma and lower water influx and efflux. However, in autumn there is an increase in water metabolism. There are higher water influx and efflux but less sodium and potassium in their body. Their total body water is higher in autumn than in spring.
Hox genes play a massive role in some amphibians and reptiles in their ability to regenerate lost limbs, especially HoxA and HoxD genes. [1]If the processes involved in forming new tissue can be reverse-engineered into humans, it may be possible to heal injuries of the spinal cord or brain, repair damaged organs and reduce scarring and fibrosis after surgery.
The Philippine sailfin lizard has a flattened tail that is used to propel in water more quickly, adding to its natural born ability to be agile and swift in water to evade prey. [12] In the presence of predators, the Philippine sailfin lizard either drops from the tree branch it is residing on, runs, or swims to the bottom of the body of water ...
Adults of P. obsoletus can become quite large, with a reported typical total length (including tail) of 106.5–183 cm (3 ft 6 in – 6 ft 0 in). [8] [9] It is the largest snake found in Canada. The record total length is 256.5 cm (8 ft 5 in), [10] making it (officially) the longest snake in North America. [9]
Tropidophorus grayi, commonly called the spiny waterside skink, [1] Gray's keeled skink, Gray's water skink, and the Philippine spiny stream skink is a relatively abundant but secretive skink species, a lizard in the family Scincidae.
Tuatara are of interest for studying the evolution of reptiles. Tuatara are greenish brown and grey, and measure up to 80 cm (31 in) from head to tail-tip and weigh up to 1.3 kg (2.9 lb) [10] with a spiny crest along the back, especially pronounced in males. They have two rows of teeth in the upper jaw overlapping one row on the lower jaw ...