Malerisaurus
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Malerisaurus Temporal range: Late Triassic, 228–215 Ma |
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| Malerisaurus robinsonae | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Protorosauria |
| Genus: |
†Malerisaurus Chatterjee, 1980 |
| Species | |
Malerisaurus is an extinct genus of prolacertiform archosauromorph known from Andhra Pradesh of India and Texas of the USA.
Malerisaurus was a medium-sized prolacertiform which averaged 1.2 meters in length.Malerisaurus is known from the holotype ISIR 150, two articulated and almost complete skeletons which were discovered as the presumable gastric contents of two skeletons of Parasuchus hislopi. It was collected from the Lower Maleri Formation, dating to the late Carnian or early Norian stage of the Late Triassic. Malerisaurus robinsonae was a small archosauromorph, probably capable of climbing trees and swimming. The skull has some adaptations to a carnivorous diet, but is nevertheless unspecialised and probably more of an insectivore. Malerisaurus, seen as a diapsid skull, shows primitive and advanced facies in its unossified laterosphenoid, absence of antorbital and mandibular fenestrae, gracile form, primitive girdles, elongated cervicals and absence of dermal armour. The suborder Prolacertiformes currently represents four families: Sharovipterygidae, Protorosauridae, Prolacertidae and Tanystropheidae. Chatterjee provisionally regarded Malerisaurus as close to Protorosaurus.
A second species, M. langstoni, is known from the holotype TMM 31099-11, a partial but poorly preserved skeleton. It was collected in the Otis Chalk Quarry 2 (TMM 31099 locality) from the Colorado City Formation, Chinle Group, dating to the early Carnian stage of the Late Triassic, about 228-227.5 million years ago. It was found in the Howard County of Texas. Spielmann et al. (2006) redescribed the type material of M. langstoni and concluded that it's indistinguishable from the type species of Trilophosaurus, T. buettneri, and thus M. langstoni represents its junior synonym.
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