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Os antarctilamniformes habitaram águas costeiras do Hemisfério Sul entre 385 e 374 milhões de anos atrás. Dentes, escamas e espinhos de nadadeiras costumam ser os elementos mais comuns de seu registro paleontológico. Encontravam-se na base evolutiva do qual derivariam mais tarde os tubarões modernos.

Antartilamniforms inhabited shoreline waters along Southern Hemisphere between 385 and 374 million years ago. Teeth, scales and fin spines use to be the most common elements of their paleontological record. They were at the evolutionary basis from which modern sharks would later derive.

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