Alwalkeria

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17 Mar 2024
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However, due to a previous technical naming conflict, the name Alwalkeria was introduced in 1994 by Chatterjee and Ben Creisler after discovering the original name was already in use for a bryozoan. The specific name maleriensis pays homage to the Maleri Formation in southern India where the fossils of Alwalkeria were unearthed. In 2011, Novas and team supported the validity of Alwalkeria citing distinct features in its femur and astragalus resembling those of early dinosaurs.

The holotype ISI R306, representing the only known specimen, is incomplete and includes various parts such as jaw sections, vertebrae, a femur, and an ankle bone. The partial skull is approximately 4 centimeters long, showing similarities to Eoraptor in tooth spacing and shape, as well as other morphological features that connect the two species. Alwalkeria likely measured around 1.5 meters long and weighed between 2-5 kilograms.

The holotype had heterodont dentition in the upper jaw, meaning that the teeth are differently shaped depending on their position in the jaw. Similarly to Eoraptor and basal sauropodomorphs, the front teeth are slender and straight, while the teeth in the sides of the jaw are curved backwards like those of predatory theropods, although none of these teeth are serrated. This arrangement of teeth is neither clearly herbivorous nor clearly carnivorous, which suggests that the jaws were from an omnivore with a varied diet, including insects, small vertebrates, and plant material.

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