Enantiornithes & Gallimimus - Unionpedia, the concept map

Barun Goyot Formation

The Barun Goyot Formation (also known as Baruungoyot Formation or West Goyot Formation) is a geological formation dating to the Late Cretaceous Period.

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Bissekty Formation

The Bissekty Formation (sometimes referred to as Bissekt) is a geologic formation and Lagerstätte which crops out in the Kyzyl Kum desert of Uzbekistan, and dates to the Late Cretaceous Period.

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Clade

In biological phylogenetics, a clade, also known as a monophyletic group or natural group, is a grouping of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree.

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Convergent evolution

Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time.

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Coracoid

A coracoid (from Greek κόραξ, koraks, raven) is a paired bone which is part of the shoulder assembly in all vertebrates except therian mammals (marsupials and placentals).

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Cranial kinesis

Cranial kinesis is the term for significant movement of skull bones relative to each other in addition to movement at the joint between the upper and lower jaws.

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Cretaceous

The Cretaceous is a geological period that lasted from about 145 to 66 million years ago (Mya).

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Dinosaur

Dinosaurs are a diverse group of reptiles of the clade Dinosauria.

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Djadochta Formation

The Djadochta Formation (sometimes transcribed and also known as Djadokhta, Djadokata, or Dzhadokhtskaya) is a highly fossiliferous geological formation situated in Central Asia, Gobi Desert, dating from the Late Cretaceous period, about 75 million to 71 million years ago.

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Enantiornithes

The Enantiornithes, also known as enantiornithines or enantiornitheans in literature, are a group of extinct avialans ("birds" in the broad sense), the most abundant and diverse group known from the Mesozoic era.

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Gastrolith

A gastrolith, also called a stomach stone or gizzard stone, is a rock held inside a gastrointestinal tract.

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Geologic time scale

The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth.

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Gurilynia

Gurilynia is a genus of enantiornithine birds.

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Hesperornithes

Hesperornithes is an extinct and highly specialized group of aquatic avialans closely related to the ancestors of modern birds.

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Histology

Histology, also known as microscopic anatomy or microanatomy, is the branch of biology that studies the microscopic anatomy of biological tissues.

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Humerus

The humerus (humeri) is a long bone in the arm that runs from the shoulder to the elbow.

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Late Cretaceous

The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale.

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Maastrichtian

The Maastrichtian is, in the International Commission on Stratigraphy (ICS) geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem.

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Mongolia

Mongolia is a landlocked country in East Asia, bordered by Russia to the north and China to the south.

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Nemegt Formation

The Nemegt Formation (also known as Nemegtskaya Svita) is a geological formation in the Gobi Desert of Mongolia, dating to the Late Cretaceous.

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Nomen nudum

In taxonomy, a nomen nudum ('naked name'; plural nomina nuda) is a designation which looks exactly like a scientific name of an organism, and may have originally been intended to be one, but it has not been published with an adequate description.

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Orbit (anatomy)

In anatomy, the orbit is the cavity or socket/hole of the skull in which the eye and its appendages are situated.

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Ostrich

Ostriches are large flightless birds.

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Premaxilla

The premaxilla (or praemaxilla) is one of a pair of small cranial bones at the very tip of the upper jaw of many animals, usually, but not always, bearing teeth.

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Scapula

The scapula (scapulae or scapulas), also known as the shoulder blade, is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone).

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Temporal fenestra

Temporal fenestrae are openings in the temporal region of the skull of some amniotes, behind the orbit (eye socket).

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Theropoda

Theropoda (from ancient Greek whose members are known as theropods, is a dinosaur clade that is characterized by hollow bones and three toes and claws on each limb. Theropods are generally classed as a group of saurischian dinosaurs. They were ancestrally carnivorous, although a number of theropod groups evolved to become herbivores and omnivores. Theropods first appeared during the Carnian age of the late Triassic period 231.4 million years ago (Ma) and included the majority of large terrestrial carnivores from the Early Jurassic until at least the close of the Cretaceous, about 66 Ma. In the Jurassic, birds evolved from small specialized coelurosaurian theropods, and are today represented by about 11,000 living species.

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