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X-ray showing the skeleton of Typhlonectes (Typhlonectidae). Caecilians' anatomy is highly adapted for a burrowing lifestyle. In a couple of species belonging to the primitive genus Ichthyophis vestigial traces of limbs have been found, and in Typhlonectes compressicauda the presence of limb buds has been observed during embryonic development, remnants in an otherwise completely limbless body. [7]
Atretochoana eiselti is a species of caecilian originally known only from two preserved specimens discovered by Sir Graham Hales in the Brazilian rainforest, while on an expedition with Sir Brian Doll in the late 1800s, but rediscovered in 2011 by engineers working on a hydroelectric dam project in Brazil.
The African clawed frog (Xenopus laevis), also known as simply xenopus, African clawed toad, African claw-toed frog or the platanna) is a species of African aquatic frog of the family Pipidae. Its name is derived from the short black claws on its feet. The word Xenopus means 'strange foot' and laevis means 'smooth'.
It provides a little extra protection against kicks, which are common during cat fights as a cat will try to rake with its rear claws. In wild cats , the ancestors of domesticated felines, this pouch appears to be present to provide extra room in case the animal has the opportunity to eat a large meal and the stomach needs to expand.
Diagram of the anatomy of the gammaridean amphipod Leucothoe incisa. The body of an amphipod is divided into 13 segments, which can be grouped into a head, a thorax and an abdomen. [4] The head is fused to the thorax, and bears two pairs of antennae and one pair of sessile compound eyes. [6] It also carries the mouthparts, but these are mostly ...
Small prey will be pulled completely into the mouth before being eaten. Structure of the teeth within the jaw tend to be arched caudal on the head. [ 15 ] The muscles of the jaw give them the ability to grab and hold on to prey as well as create a negative pressure to suck in the prey and displace the jaw.
The name Reptiliomorpha was coined by Professor Gunnar Säve-Söderbergh in 1934 to designate amniotes and various types of late Paleozoic tetrapods that were more closely related to amniotes than to living amphibians. In his view, the amphibians had evolved from fish twice, with one group composed of the ancestors of modern salamanders and the ...
Two-toed amphiumas are the most prominent in the Amphiumidae family and the longest salamander species in the United States, [4] that can grow from 39 to 1,042 g (1.4 to 36.8 oz) in mass and from 34.8 to 116 cm (13.7 to 45.7 in) in length.