“Thotobolosaurus”is a nomen nudum, meaning that the genus name was not actually accompanied by a good description, so it’s not really technically described. Still, we’re always up for a challenge here at ADAD (I say we, because fezraptor took it upon himself to help me with this), so we are going to talk about it anyway! It was excavated between 1955 and 1970, and were discovered near a garbage pile near the house of Mabeata, a woman living in Maphutseng, in Lesotho; back then, it was a British colony. The fossil have moved around a lot since their excavation; the rocks it was discovered in were part of the lower Elliot Formation, which was probably from the Carnian or Norian ages of the Late Triassic, between 208.5 and 235 million years ago. It was one of the earliest large dinosaurs, and is known from multiple poorly preserved skeletons. It was quadrupedal, and may have been 8-10 meters long - longer than even Melanorosaurus; though most of what we know about it is based on its relatives, including Antetonitrus, due to the scattered nature of its remains. Clearly, the fossils need to be formally described, before we can really know more about this animal.
Ellenberger F, Ellenberger P. 1956. Le gisement de dinosauriens de Maphutseng (Basutoland, Afrique du Sud). Comptes Rendus Sommaires de la Societe Geologique de France 8:99-101.
Gauffre F-X. 1993. Biochronostratigraphy of the Lower Elliot Formation (southern Africa) and preliminary results on the Maphutseng dinosaur (Saurischia: Prosauropoda) from the same Formation of Lesotho. New Mexico Museum of Natural History and Science Bulletin 3:147-149.
McPhee BW, Yates AM, Choiniere JN, Abdala F. 2014. The complete anatomy and phylogenetic relationships of Antetonitrus ingenipes (Sauropodiformes, Dinosauria): implications for the origins of Sauropoda. Zoological Journal of the Linnean Society 171:151-205.
Padian K. 2013. The problem of dinosaur origins: integrating three approaches to the rise of Dinosauria. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 103:423-442.