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Extinct Marine Fossil Crossword Clue and Answers List

RateAnswerClue
TRILOBITE Extinct marine arthropod, a common fossil
MOSASAURIA An order of large, extinct, marine reptiles, found in the Cretaceous rocks, especially in America. They were serpentlike in form and in having ...
ELASMOSAURUS An extinct, long-necked, marine, cretaceous reptile from Kansas, allied to Plesiosaurus.
CLIDASTES A genus of extinct marine reptiles, allied to the Mosasaurus. See Illust. in Appendix.
PLIOSAURUS An extinct genus of marine reptiles allied to Plesiosaurus, but having a much shorter neck.
SEA SAURIAN Any marine saurian; esp. (Paleon.) the large extinct species of Mosasaurus, Icthyosaurus, Plesiosaurus, and related genera.
STEGOCEPHALA An extinct order of amphibians found fossil in the Mesozoic rocks; called also Stegocephali, and Labyrinthodonta.
SCOLITHUS A tubular structure found in Potsdam sandstone, and believed to be the fossil burrow of a marine worm.
BACULITE A cephalopod of the extinct genus Baculites, found fossil in the Cretaceous rocks. It is like an uncoiled ammonite.
ENALIOSAURIA An extinct group of marine reptiles, embracing both the Ichthyosauria and the Plesiosauria, now regarded as distinct orders.
PLESIOSAURIA An extinct order of Mesozoic marine reptiles including the genera Plesiosaurus, and allied forms; -- called also Sauropterygia.
INOCERAMUS An extinct genus of large, fossil, bivalve shells,allied to the mussels. The genus is characteristic of the Cretaceous period.
EOSAURUS An extinct marine reptile from the coal measures of Nova Scotia; -- so named because supposed to be of the earliest known reptiles.
TILLODONTIA An extinct group of Mammalia found fossil in the Eocene formation. The species are related to the carnivores, ungulates, and rodents. Called also Tillodonta.
PLESIOSAURUS A genus of large extinct marine reptiles, having a very long neck, a small head, and paddles for swimming. It lived in the Mesozoic age.
ICHTHYOSAURIA An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period.
GONIATITE One of an extinct genus of fossil cephalopods, allied to the Ammonites. The earliest forms are found in the Devonian formation, the latest, in the Triassic.
CHEIROTHERIUM A genus of extinct animals, so named from fossil footprints rudely resembling impressions of the human hand, and believed to have been made by ...
POLYCYSTINA A division of Radiolaria including numerous minute marine species. The skeleton is composed of silica, and is often very elegant in form and sc...
RUGOSA An extinct tribe of fossil corals, including numerous species, many of them of large size. They are characteristic of the Paleozoic formations....
CRINOIDEA A large class of Echinodermata, including numerous extinct families and genera, but comparatively few living ones. Most of the fossil species, ...
ICHTHYOSAURUS An extinct genus of marine reptiles; -- so named from their short, biconcave vertebrae, resembling those of fishes. Several species, varying in...
MOSASAURUS A genus of extinct marine reptiles allied to the lizards, but having the body much elongated, and the limbs in the form of paddles. The first k...
NOTORNIS ...land. It is supposed to be now nearly or quite extinct. ...
AMMONITE .... There are many genera and species, and all are extinct, the typical forms having existed only in the Mesozoic age, when they were exceedingly ...
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