- cartilage. The very
first remains of
Ptychodus were
found in
England and
Germany in the
first half of the 18th century.
Ptychodus teeth have long been identified...
-
Scapanorhynchus tex****,
Squalicorax kaupi,
Squalicorax pristodontus and
Ptychodus mortoni from the
Upper Cretaceous strata from the Gulf
Coastal Plain,...
- †Serratolamna
Family †Ptychodontidae (extinct,
Cretaceous period)
Genus †
Ptychodus (16+ species)
Below is a
cladogram showing relationships within Lamniformes...
-
reservoir by an embankment. [citation needed] In 1926, a
fossilized tooth of
Ptychodus latissimus paucisulcata was
found in
redeposited sediments of
Tunguz sand...
-
included sharks such as Squalicorax, Cretoxyrhina, and the
giant durophagous Ptychodus mortoni (believed to be 10
metres (33 ft) long); and
advanced bony fish...
-
dolichosaurian thoracic vertebra and
teeth of chondrichthyians:
hybodontiform Ptychodus and
lamniform Protolamna, Cretolamna,
Cretoxyrhina and Hispidaspis. These...
- the
plesiosaur Mauriciosaurus, the
mosasaur Yaguarasaurus and
sharks Ptychodus and Aquilolamna.
Earth sciences portal Mexico portal Paleontology portal...
- †Pterotrigonia †
Ptychodus †
Ptychodus anonymus – or
unidentified comparable form †
Ptychodus decurrens †
Ptychodus mortoni †
Ptychodus occidentalis †
Ptychodus whipplei...
- Glikman, 1980 †
Ptychodus Ag****iz, 1839 †
Ptychodus acutus Ag****iz, 1843 †
Ptychodus ag****izi Dixon, 1850 †
Ptychodus altior Ag****iz, 1843 †
Ptychodus anonymus Williston...
-
unique dentition,
combining Squalicorax-like,
cutting anterior teeth with
Ptychodus-like,
crushing posterior teeth. Glickman, L.S. (1980).
Evolyutsiya melovykh...
