Final answer:
Paleoclimatic evidence, such as plant fossils and foraminifera fossils, support the idea of the late Paleozoic supercontinent in the Southern Hemisphere.
Step-by-step explanation:
The late Paleozoic supercontinent in the Southern Hemisphere, known as Gondwana, is supported by various paleoclimatic evidence. One piece of evidence is the distribution of plant fossils. For example, the presence of fern spores above and below the Cretaceous-Paleogene boundary suggests a significant change in climate and vegetation during that time period. Another piece of evidence is the relative abundance of foraminifera fossils, which can provide information about past sea levels and climate conditions. Additionally, the configuration of Pangaea, the supercontinent that formed during the latter half of the Paleozoic, supports the existence of Gondwana in the Southern Hemisphere.