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Use the following information to answer the questions below: ( 6 pts) "Fossils of Lustrosaurus, a dicynodont therapsid, are most common in parts of modern-day South America, South Africa, Madagascar, India, South Australia, and Antarctica. Fossils of Lystrosaurus Essay Paper  It apparently lived in arid regions, and was mostly herbivorous. It originated during the mid-Permian period, survived the Permian extinction, and dwindled by the late Triassic, though there is evidence of a relict population in Australia during the Cretaceous. The dicynodonts had two large tusks, extending down from their upper jaws; the tusks were not used for food gathering, and in some species were limited to males.

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Food was gathered using an otherwise toothless beak. Judging from the fossil record, these pig-sized organisms were the most common mammal-like reptiles of the Permian." a. What kind of prediction could you make about the following anatomical features? EXPLAIN 1. Jaw hinge: 2. Temporal fenestra: b. Which of the Lystrosaurus' features or characteristics help explain why these organisms fossilized so abundantly? EXPLAIN c. Give a possible (plausible) explanation (hypothesis) for the modern-day distribution of dicynodont fossils and support your explanation with evidence. (i.e, My hypothesis is ...., because ....) d. Give a possible (plausible) explanation for the observation that tusks were limited to males in some species, and were apparently not used in food gathering. EXPLAIN e. Give a possible (plausible) explanation for the observation that there are at least a dozen known species in the extinct genus Lystrosaurus and each species appeared suited to a different habitat and diet. EXPLAIN f. What conditions would the dicynodonts that survived the Permian extinction have had to endure? EXPLAIN  Fossils of Lystrosaurus Essay Paper