Squalodontidae closely related to the South Asian river dolphin ("Platanista gangetica"). The genus "Squalodon" was named by French naturalist Jean-Pierre Sylvestre de Grateloup in 1840 based on a jaw fragment he thought belonged to a reptile. Fossils discovered later, nevertheless, showed that this was a toothed whale. In extant odontocetes, however, the dentition is atavistic with all teeth reduced to simple, undifferentiated conical shapes. In squalodonts the teeth resemble those of the archaic whales, Archaeoceti, with conical incisors anteriorly and low-crowned, serrated teeth posteriorly. Squalodontidae Squalodontidae or the shark-toothed dolphins is an extinct family of large toothed whales who had long
X-Men: Endangered Species X-Men: Endangered Species "Endangered Species" is a 2007 comic book storyline published by Marvel Comics. Starring the X-Men, it ran from June to October 2007. It begins with the "Endangered Species" one-shot written by Mike Carey and drawn by Scot Eaton. The storyline, following up on the events of "House of M" and "Decimation", focuses on the Beast and explains why some mutants have retained their superpowers. The story is composed of a one-shot and 17 eight-page back-up stories spread across the "X-Men", "Uncanny X-Men", "X-Factor" and "New X-Men" titles, starting with "" #200. It acts as a prelude to