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The integument, or body covering, of Psittacosaurus is known from a Chinese specimen, SMF R 4970, which most likely comes from the Yixian Formation of Liaoning Province, China. The specimen, which is not yet assigned to any particular species, was likely illegally exported from China and was purchased in 2001 by the Senckenberg Museum in Germany .
For these, the "lizard model" was entirely abandoned: they would have had an upright stance and a high metabolism. This also meant that earlier size estimates had been exaggerated. By simply adding the known length of the vertebrae, instead of extrapolating from a lizard, Owen arrived at a total body length for Megalosaurus of 30 feet. In the ...
The generic name would normally read as "armoured lizard" from the Greek hoplon, "body armour". The usual story about the — given the fact that Oplosaurus is not known to be armoured — odd choice of name is that Gervais named this large, well-preserved tooth ( holotype BMNH R964) under the mistaken belief that its owner was an armoured ...
As they grow they add concentric layers. They are arranged so as to overlap in a head-to-tail direction, like roof tiles, allowing a smoother flow of water over the body and therefore reducing drag. [3] They come in two forms: Cycloid scales have a smooth outer edge, and are most common on fish with soft fin rays, such as salmon and carp.
Lizards of the genus Laemanctus exhibit the following characters. The tympanum is distinct. The plane of the top of the head slopes forward, and the occipital region is raised and extends beyond the occiput. The body is laterally compressed, and is covered with imbricate keeled scales.
A small body size would allow these lizards to take advantage of the brief warm periods experienced at high latitudes or elevations, which a larger lizard would otherwise not be able to exploit. [5] These animals illustrate the breadth of information that remains unknown with regard to herbivorous lepidosaurs.
Most lizard species and some snake species are insectivores. The remaining snake species, tuataras, and amphisbaenians, are carnivores. While some snake species are generalist, others eat a narrow range of prey - for example, Salvadora only eat lizards. [33] The remaining lizards are omnivores and can consume plants or insects. The broad ...
This contrast with the pleurodont condition found in the vast majority of lizards, where the teeth are attached to the inward-facing surface of the jaw. The teeth of the tuatara are extensively fused to the jawbone, making the boundary between the tooth and jaw difficult to discern, and the teeth lack roots and are not replaced during the ...