Pliotrema Directory References Discover Why Do We Eat Turkey on Thanksgiving? What Is the Difference Between a Typhoon and a Super Typhoon? Why Is It Called Black Friday? Inventors and Inventions of the Industrial Revolution 10 Famous Artworks by Leonardo da Vinci Pro and Con: School Uniforms 11 Egyptian Gods and Goddesses Contents Pliotrema shark genus Ask the Chatbot a Question Learn about this topic in these articles:saw sharks In saw shark…two genera of saw sharks: Pliotrema, with six pairs of gill openings, and Pristiophorus, with five.Read More