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
Endangered Species Act of 1969 passed prior to the 1969 act, and set up a list of species native to the United States that qualified as endangered. The animals on this list were then afforded certain protections from the National Wildlife Refuge System. For example, the Endangered Species Preservation Act was in part dedicated to raising awareness of endangered species of birds like the peregrine falcon, and to "conserve, protect, restore, and propagate certain species of native fish and wildlife". Despite these protections, however, researchers found that the act was insufficient. This led to the passage of the Endangered Species Conservation Act of 1969. The