Bolosaurus
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Bolosaurus Temporal range: Early Permian, 289.5–273.6 Ma |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | †Parareptilia |
| Order: | †Procolophonomorpha |
| Family: | †Bolosauridae |
| Genus: |
†Bolosaurus Cope, 1878 |
| Species | |
Bolosaurus (from "Bolo" + saurus Latin: Lizard]) is an extinct genus of bolosaurid ankyramorph parareptile from the Cisuralian epoch (middle Sakmarian to early Kungurian stages) of North Asia and North America (Oklahoma and Texas).
Permian period is characterized by the presence of single supercontinent called Pangea. Pangaea stretched from pole to pole, and thus created a single great ocean called Panthalassa, and the Paleo-Tethys Ocean, which was located between Asia and Gondwana. The single gigantic continental landmass created climates of extreme continental climate, which is characterized by extreme variations of heat and cold as well as highly seasonal monsoon conditions in some parts of the supercontinent. Not all regions received abundant rainfalls, and deserts were widespread on Pangaea. Such climate patterns favored gymnosperms, over plants that use spore dispersion.
The first Bolosaurus was described by Edward Drinker Cope in 1878. His article "Descriptions of Extinct Batrachia and Reptilia from the Permian Formation of Texas" mentioned the findings of crushed skull and few vertebrae of Bolosaurus striatus and Bolosaurus rapidens (Cope 1878). The imperfect skull of Bolosaurus major was found by Robert Broom in 1911 and was published in his article "On the structure and Affinities of Bolosaurus" in 1913 (Broom 1913). In 1974 a bolosaurid maxilla was found by Tartarinov in Mylva River, Komi, Russia and was named Bolosaurus traati (Tartarinov 1974). The most recent Bolosaurus species to have been discovered was by Robert R. Reisz, who found the jawbones of Bolosaurus grandis and published it in 2002 (Reisz 2002).
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