Allosaurus & Pterosaur - Unionpedia, the concept map

Archosaur

Archosauria or archosaurs is a clade of diapsid sauropsid tetrapods, with birds and crocodilians being the only extant representatives.

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Bipedalism

Bipedalism is a form of terrestrial locomotion where an animal moves by means of its two rear (or lower) limbs or legs.

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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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Crocodilia

Crocodilia (or Crocodylia, both) is an order of semiaquatic, predatory reptiles known as crocodilians.

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CT scan

A computed tomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed internal images of the body.

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Early Cretaceous

The Early Cretaceous (geochronological name) or the Lower Cretaceous (chronostratigraphic name) is the earlier or lower of the two major divisions of the Cretaceous.

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Ecological niche

In ecology, a niche is the match of a species to a specific environmental condition.

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Egg

An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the animal hatches.

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Extinction

Extinction is the termination of a taxon by the death of its last member.

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Femur

The femur (femurs or femora), or thigh bone is the only bone in the thigh.

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Fossil

A fossil (from Classical Latin) is any preserved remains, impression, or trace of any once-living thing from a past geological age.

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Gastralia

Gastralia (gastralium) are dermal bones found in the ventral body wall of modern crocodilians and tuatara, and many prehistoric tetrapods.

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Haemal arch

A haemal arch, also known as a chevron, is a bony arch on the ventral side of a tail vertebra of a vertebrate.

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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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Ilium (bone)

The ilium (ilia) is the uppermost and largest region of the coxal bone, and appears in most vertebrates including mammals and birds, but not bony fish.

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Jurassic

The Jurassic is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya.

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Keratin

Keratin is one of a family of structural fibrous proteins also known as scleroproteins.

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Late Jurassic

The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 161.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.

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Mammal

A mammal is a vertebrate animal of the class Mammalia.

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Mandible

In jawed vertebrates, the mandible (from the Latin mandibula, 'for chewing'), lower jaw, or jawbone is a bone that makes up the lowerand typically more mobilecomponent of the mouth (the upper jaw being known as the maxilla).

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Maniraptora

Maniraptora is a clade of coelurosaurian dinosaurs which includes the birds and the non-avian dinosaurs that were more closely related to them than to Ornithomimus velox.

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Maxilla

In vertebrates, the maxilla (maxillae) is the upper fixed (not fixed in Neopterygii) bone of the jaw formed from the fusion of two maxillary bones.

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Metatarsal bones

The metatarsal bones or metatarsus (metatarsi) are a group of five long bones in the midfoot, located between the tarsal bones (which form the heel and the ankle) and the phalanges (toes).

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Neurocranium

In human anatomy, the neurocranium, also known as the braincase, brainpan, or brain-pan, is the upper and back part of the skull, which forms a protective case around the brain.

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Ornithischia

Ornithischia is an extinct clade of mainly herbivorous dinosaurs characterized by a pelvic structure superficially similar to that of birds.

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Othniel Charles Marsh

Othniel Charles Marsh (October 29, 1831 – March 18, 1899) was an American professor of Paleontology in Yale College and President of the National Academy of Sciences.

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Paraphyly

Paraphyly is a taxonomic term describing a grouping that consists of the grouping's last common ancestor and some but not all of its descendant lineages.

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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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Pterosaur

Pterosaurs (from Greek pteron and sauros, meaning "wing lizard") are an extinct clade of flying reptiles in the order Pterosauria.

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Pubis (bone)

In vertebrates, the pubis or pubic bone (os pubis) forms the lower and anterior part of each side of the hip bone.

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Radius (bone)

The radius or radial bone (radii or radiuses) is one of the two large bones of the forearm, the other being the ulna.

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Respiratory system

The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs and structures used for gas exchange in animals and plants.

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Robert T. Bakker

Robert Thomas Bakker (born March 24, 1945) is an American paleontologist who helped reshape modern theories about dinosaurs, particularly by adding support to the theory that some dinosaurs were endothermic (warm-blooded).

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Sacrum

The sacrum (sacra or sacrums), in human anatomy, is a large, triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1S5) between ages 18 and 30.

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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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Sexual dimorphism

Sexual dimorphism is the condition where sexes of the same species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction.

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Taxonomy (biology)

In biology, taxonomy is the scientific study of naming, defining (circumscribing) and classifying groups of biological organisms based on shared characteristics.

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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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Tibia

The tibia (tibiae or tibias), also known as the shinbone or shankbone, is the larger, stronger, and anterior (frontal) of the two bones in the leg below the knee in vertebrates (the other being the fibula, behind and to the outside of the tibia); it connects the knee with the ankle.

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Ulna

The ulna or ulnar bone (ulnae or ulnas) is a long bone in the forearm stretching from the elbow to the wrist.

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Vertebra

Each vertebra (vertebrae) is an irregular bone with a complex structure composed of bone and some hyaline cartilage, that make up the vertebral column or spine, of vertebrates.

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