Cretaceous

The third, and last, period of the Mesozoic Era, from 145.5 to 16.5 mya. The Cretaceous is divided into Early and Late Cretaceous epochs .

Tyrannosaurus rex, one of the largest land predators of all time, lived during the late Cretaceous.

Up to 2 m-long Velociraptor was likely feathered and roamed the late Cretaceous.

Triceratops is one of the most recognizable genera of the Cretaceous.

Mammals were a minor part of the Cretacean fauna with Eomaia being the first eutherian.

A pterosaur, Anhanguera piscator

A scene from the early Cretaceous: a Woolungasaurus is attacked by a Kronosaurus.

Tylosaurus was the largest known mosasaur, carnivorous marine reptiles that emerged in the late Cretaceous.

Strong-swimming and toothed predatory waterbird Hesperornis roamed late Cretacean oceans.

The ammonite Discoscaphites iris, Owl Creek Formation (Upper Cretaceous), Ripley, Mississippi.

A plate with Nematonotus sp., Pseudostacus sp., and a partial Dercetis triqueter, found in Hakel, Lebanon

References

This article is part of Project Glossary, an All Birds project that aims to write comprehensive articles on each term related to animals.

Project Glossary
Glossary v • t • e A Abdomen • Aberrant • Abmigration • Abrasion • Absolute magnitude • Absorption line • Abyssal • Abyssal plain • Abyssal zone • Accelerating universe • Accidental • Accretion • Acquisition • Active galaxy • Active prominence • Adaptive radiation • Addition • Adult • Adult plumage • Aerie • African parrot • Air mass • Air sac • Airfoil • Alarm call • Albedo • Albino • Allopatric • Allopreening • Altazimuth mounting • Altitude • Altricial • Alula • Americas • Anadromous • Anaerobic • Anatomy • Annual parallax • Annual proper motion • Annualar eclipse • Anoxic • Antarctic Circle • Ant-follower • Anterior • Anticyclone • Anting • Antimatter • Antiparticle • Antiphonal song • Aperture • Apogee • Apparent magnitude • Arachnoid • Arboreal • Arctic Circle • Argon • Arm • Asexual reproduction • Asterism • Asteroid • Astronomical unit • Asynchronous hatching • Atmosphere • Atoll • Atom • Auricular • Auricular patch • Aurora • Autapomorphy • Authigenic • Autotroph • Autumnal equinox • Avian influenza • Axillaries • Azimuth B Back • Background radiation • Backshore • Backwash • Baleen • Band • Bank • Bar • Barbel • Barbule • Barnard • Barrage • Barred • Barred spiral galaxy • Barrier island • Barrier reef • Baryon • Basal (phylogenetics) • Basic I • Basin • Bathyal • Beach face • Belly • Beryllium • Benthos • Berm • Bib • Big Bang • Big Crunch • Big Rip • Binary star • Binomial nomenclature • Biodiversity • Biogenic • Bioluminescence • Biomass • Biome • Bioturbation • Bipedalism • Bird anatomy • Bird diets • Bird egg • Bird flight • Bird hybrid • Bird intelligence • Bird migration • Bird nest • Bird of prey • Bird reproduction • Bird senses • Bird song • Black body • Black dwarf star • Black hole • Black smoker • Blazar • BL lacterae object • Bloom • Blue shift • Body fossil • Bok globule • Booted • Bore • Brackish • Breaker zone • Breakwater • Breast • Breastband • Breeding plumage • Brood parasite • Brown dwarf star • Bustle • Buzzard • Bycatch C Calcareous • Calcium carbonate • Calendar year • Caldera • Callosity • Calve • Carapace • Carbon cycle • Carnivore • Carpal • Carpal bar • Casque • Casual • Catadromous • Cere • Cheek • Chemosynthesis • Chevron • Chin • Chlorophyll • Chromatophore • Cilia • Clade • Class • Cline • Cloaca • Coast • Cob • Cold seep • Collar • Colonial • Colour morph • Commensalism • Commic terns • Commissure • Common name • Concordant coast • Congeneric • Conservation status • Conspecific • Continental crust • Continental margin • Continental rise • Continental shelf • Continental slope • Convection • Convergent evolution • Coral bleaching • Coral reef • Coralline • Coriolis effect • Coverts • Crepuscular • Crest • Cretaceous • Crissum • Critically Endangered • Crown • Crown patch • Cryptic • Culmen • Current • Cusp • Cyclone D Dactyly • Dark zone • Dawn chorus • Deforestation • Delta • Demersal • Deposit feeding • Depositional coast • Detritus • Deuterium • Dewlap • Diagnostic • Digital object identifier • Dihedral • Discordant coast • DNA • DNA sequence • Doldrums • Dorsal • Drift • Drowned coast • Dune E Ear tuft • Earth • Echolocation • Echo-sounding • Eclipse plumage • Eddy • Egg • Egg tooth • Ekman effect • El Nino • Emargination • Emergent coast • Endangered • Endangered species • Endemic • Endemism • ENSO • Eocene • Equator • Erosional coast • Estuary • Eustatic • Eutrophication • Evolution of birds • Extant • Extinct • Extinct in the wild • Extinction • Exoskeleton • Eye • Eye line • Eye ring • Eye stripe • Eye wattle • Eyebrow F Face skin • Facial disk • Family • Fast ice • Fathom • Fault •Feather • Feather fringe • Fecal sac • Femur • Feral • Ferrel cell • Fertilization • Fetch • Filoplume • Filter feeding • Finger • Fjord • Flagellum • Flank • Fledgling • Flight feathers • Flightless bird • Flipper • Fluke • Foot • Foot projection • Forced wave • Forecrown • Forehead • Foreneck • Foreshore • Forest • Forewing • Fossil • Fractal • Frazil ice • Fringing reef • Frons • Front • Frontal shield G Gabion • Gander • Gape • Gape flange • Genus • Gibber • Gill rakers • Glacier • Gleaning • Glide • Gonydeal angle • Gonys • Gorget • Gravitational lens • Grease ice • Grease ice • Groyne • Guano • Gular • Gular fluttering • Guyot • Gynandromorph • Gyre H H1N1 • Habitat • Habitat loss • Hackle • Hadal • Hadley cell • Half-hood • Halocline • Hand • Hatchling • Hawk • Headland • Heat capacity • Helium • Herbig-Haro object • Herbivore • Hermaphrodite • Hibernation • Hindneck • Holdfast • Holoplankton • Hood • Hotspot • Hover • Humerus • Hurricane • Hybrid • Hydrocarbon • Hydrogen • Hydrothermal vent I-K Ice age • Iceberg • Ice cap • Ice lead • Ice rafting • Ice sheet • Ice shelf • Igneous rock • Immature • Incertae sedis • Infraorder • Insectivore • Intermediate coast • Internal wave • International Standard Book Number • Introduced species • Intertropical convergence zone • Invertebrate • Iridescence • Irradiance • Irruption • Island arc • Isolating mechanisms • Isotasy • IUCN • Juvenile • Katabatic wind • Keel • Kite (verb) • Kleptoparasitism • Krypton

Template:Project Geology