Fossil Record.

The earliest ancestors of modern sea turtles may have come from the Deep South in the United States, new evidence suggests. 100-150 million years ago b. after the giant asteroid hit the earth 65 million years ago c. 150-200 million years ago d. 65-100 million years ago e. 200-300 million years ago 2) All 7 species of sea turtles currently living evolved 50-60 million years […]

1) Modern sea turtles began appearing in the fossil records: a. Turtles History And Fossil Record, Morphology, Ecology, Behavior And Life History, Side-neck TurtlesClassification, Turtles and humans The 257 living species inhabit all continents except Antarctica , plus many islands, and there are marine turtles in all tropical and temperate oceans.

100-150 million years ago b. after the giant asteroid hit the earth 65 million years ago c. 150-200 million years ago d. 65-100 million years ago e. 200-300 million years ago 2) All 7 species of sea turtles currently living evolved 50-60 million years […] Turtles are unique among known extant and extinct tetrapods, including other forms with armour formed by bony plates (e.g. fossil fi ndings confi rm the presence of cheloniid sea turtles and testify for the existence of leatherback sea turtles. There are seven varietal species that can be found around the world in tropical, sub-tropical and temperate waters and all of them are endangered. Two halves of a fossil bone found more 160 years apart have finally allowed scientists to scale one of the biggest sea turtles that ever lived. The evolution and occurrence of fossil sea turtles at the Pacific margin of South America is poorly known and restricted to Neogene (Miocene/Pliocene) findings from the Pisco Formation, Peru. Turtles are reptiles of the order Testudines characterized by a special bony or cartilaginous shell developed from their ribs and acting as a shield. "

The first turtles appeared during the Triassic period, 245 to 209 million years ago.

Cheloniidae are a family of sea turtles that lived during the Late Cretaceous (Maastrichtian) to Recent. turtle remains. The Loggerhead Sea Turtle is the most common one to nest on our beaches during the summer months. Drew Gentry, UAB Ph.D. candidate, examining the fossils of Asmodochelys parhami. 100-150 million years ago b. after the giant asteroid hit the earth 65 million years ago c. 150-200 million years ago d. 65-100 million years ago e. 200-300 million years ago 2) All 7 species of sea turtles currently living evolved 50-60 million years […]

However, the Two halves of a fossil bone found more 160 years apart have finally allowed scientists to scale one of the biggest sea turtles that ever lived. Working with two … Turtles are reptiles of the order Testudines characterized by a special bony or cartilaginous shell developed from their ribs and acting as a shield. " They were (and still are) a world-wide distributed group and range in … In addition, we discuss the importance of this fossil site for understanding the evolution and paleobiogeography of sea turtles in the American continent. The oldest fossil sea turtle is Santanachelys, from the Early Cretaceous. Atlantochelys mortoni was originally described from a broken arm bone, or humerus, found in the 1840s in New Jersey. Photograph courtesy of McWane Science Center. The earliest known sea turtles appear in the fossil record in the Early Cretaceous period, about 110 million years ago. Th e dermochelyid remains are referred to the species Psephophorus polygonus Meyer, 1846. Softshell turtles (family Trionychidae) are the first modern turtles found in the fossil record, appearing in the Cretaceous Period. Here we report and describe the first record of Oligocene (late Oligocene, ∼24 Ma) Pan-Cheloniidae sea turtle remains of South America. Ironically, determining the relationships among the species currently alive posed real problems, at least until recently, because those relationships were based in the past primarily upon resemblance. Th e specimen MAUL 990/1a-l represents the largest carapace portion of this species so far reported in the lit-erature. The oldest sea turtle (Santanachelys gaffneyi) is known from the mid-Cretaceous.