Portal:Paleontology

The Palaeontology Portal

Introduction

Paleontology (/ˌpeɪliɒnˈtɒlədʒi, ˌpæli-, -ən-/ PAY-lee-on-TOL-ə-jee, PAL-ee-, -⁠ən-), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossils to classify organisms and study their interactions with each other and their environments (their paleoecology). Paleontological observations have been documented as far back as the 5th century BC. The science became established in the 18th century as a result of Georges Cuvier's work on comparative anatomy, and developed rapidly in the 19th century. The term has been used since 1822 formed from Greek παλαιός ('palaios', "old, ancient"), ὄν ('on', (gen. 'ontos'), "being, creature"), and λόγος ('logos', "speech, thought, study").

Paleontology lies on the border between biology and geology, but it differs from archaeology in that it excludes the study of anatomically modern humans. It now uses techniques drawn from a wide range of sciences, including biochemistry, mathematics, and engineering. Use of all these techniques has enabled paleontologists to discover much of the evolutionary history of life, almost back to when Earth became capable of supporting life, nearly 4 billion years ago. As knowledge has increased, paleontology has developed specialised sub-divisions, some of which focus on different types of fossil organisms while others study ecology and environmental history, such as ancient climates. (Full article...)

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Selected article on the prehistoric world and its legacies

Psittacosaurus skeleton. — *Psittacosaurus* skeleton.

Psittacosaurus (meaning 'parrot lizard') was a genus of psittacosaurid ceratopsian dinosaur from the Early Cretaceous Period of what is now Asia, about 130 to 100 million years ago. It is notable for being the most species-rich dinosaur genus; At least eight extinct species are recognized from fossils found in different regions of China and Mongolia, with possible additional species from Thailand and Russia.

All species of Psittacosaurus were gazelle-sized bipedal herbivores characterized by a high, powerful beak on the upper jaw. At least one species had long, quill-like structures on its tail and lower back, possibly serving a display function. Psittacosaurs were extremely early ceratopsians and, while they developed many novel adaptations of their own, they also shared many anatomical features with later ceratopsians, such as Protoceratops and the elephant-sized Triceratops.

Psittacosaurus is not as familiar to the general public as its distant relative Triceratops but it is one of the most completely known dinosaur genera. Fossils of over 150 individuals have been collected so far, including many near-complete skeletons. Most different age classes are represented, from nestling through to adult, which has allowed several detailed studies of Psittacosaurus growth rates and reproductive biology. The abundance of this dinosaur in the fossil record has led to its use as an index fossil for Early Cretaceous sediments of central Asia. (see more...)

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Did you know?

Fossil Leurospondylus vertebrae.

... that Leurospondylus ultimus was so named as it was originally thought to be the last occurrence of a plesiosaur?
... that the leaves of two species of the fossil plant genus Banksieaeformis resemble those of the living Banksia serrata?
... that the extinct Actinidia oregonensis was the first kiwi relative described from North America?
... that the extinct rove beetle genus Ektatotricha is known from 15 beetles trapped in Cretaceous amber from Myanmar?
... that UA 8699, a broken molar from the Cretaceous of Madagascar, may be the only Mesozoic marsupial from the southern continents?

... that the wasp Deinodryinus velteni (pictured) is one of only three Deinodryinus species described from the fossil record?
... that the extinct snakefly genera Lebanoraphidia and Iberoraphidia are both named for the regions they were found in?
... that Canadian paleontologist Scott D. Sampson hosted the four episode nature documentary series Dinosaur Planet for the Discovery Channel in 2003?
...that the type specimen of Dromicosuchus had damage to its jaw and neck that may have been inflicted by the teeth of the large carnivore it was found underneath?
... that unlike living rorqual whales, the late Miocene genus Plesiobalaenoptera was probably not capable of ram feeding?

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General images - load new batch

The following are images from various paleontology-related articles on Wikipedia.

Image 1First mention of the word palæontologie, as coined in January 1822 by Henri Marie Ducrotay de Blainville in his Journal de physique (from History of paleontology)
Image 2Geologic time scale from an 1861 book by Richard Owen shows the appearance of major animal types. (from History of paleontology)
Image 3A drawing comparing jaws was added in 1799 when Cuvier's 1796 presentation on living and fossil elephants was published. (from History of paleontology)
Image 4Illustration of the fossil jaw of the Stonesfield mammal from Gideon Mantell's 1848 Wonders of Geology (from History of paleontology)
Image 5Duria Antiquior – A more Ancient Dorset is a watercolor painted in 1830 by the geologist Henry De la Beche based on fossils found by Mary Anning. The late 18th and early 19th century was a time of rapid and dramatic changes in ideas about the history of life on earth. (from History of paleontology)
Image 6Elmer Riggs and H.W. Menke in Field Columbian Museum's paleontology lab, 1899 (from History of paleontology)
Image 7Johann Jakob Scheuchzer tried to explain fossils using Biblical floods in his Herbarium of the Deluge (1709). (from History of paleontology)
Image 8Diagram by O.C. Marsh of the evolution of horse feet and teeth, reproduced in T. H. Huxley's 1876 book, Professor Huxley in America (from History of paleontology)
Image 9Illustration from William Smith's Strata by Organized Fossils (1817) (from History of paleontology)
Image 10Photograph of the second Archaeopteryx skeleton to be found, taken in 1881 at the Natural History Museum, Berlin (from History of paleontology)
Image 11Fossil of the Taung child discovered in South Africa in 1924 (from History of paleontology)
Image 12A Spriggina fossil from the Ediacaran (from History of paleontology)
Image 13Philippe-Charles Schmerling (from List of paleontologists)
Image 14Illustration of fossil Iguanodon teeth with a modern iguana jaw for comparison from Mantell's 1825 paper describing Iguanodon (from History of paleontology)
Image 15Stephan Endlicher (from List of paleontologists)
Image 16A complete Anomalocaris fossil from the Burgess shale (from History of paleontology)
Image 17Illustration from Steno's 1667 paper shows a shark head and its teeth along with a fossil tooth for comparison. (from History of paleontology)

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Selected article on paleontology in human science, culture and economics

The history of paleontology traces the history of the effort to study the fossil record left behind by ancient life forms. Although fossils had been studied by scholars since ancient times, the nature of fossils and their relationship to life in the past became better understood during the 17th and 18th centuries. At the end of the 18th century the work of Georges Cuvier ended a long running debate about the reality of extinction and led to the emergence of paleontology as a scientific discipline.

The first half of the 19th century saw paleontological activity become increasingly well organized. This contributed to a rapid increase in knowledge about the history of life on Earth, and progress towards definition of the geologic time scale. As knowledge of life's history continued to improve, it became increasingly obvious that there had been some kind of successive order to the development of life. After Charles Darwin published Origin of Species in 1859, much of the focus of paleontology shifted to understanding evolutionary paths.

The last half of the 19th century saw a tremendous expansion in paleontological activity, especially in North America. The trend continued in the 20th century with additional regions of the Earth being opened to systematic fossil collection, as demonstrated by a series of important discoveries in China near the end of the 20th century. There was also a renewed interest in the Cambrian explosion that saw the development of the body plans of most animal phyla. (see more...)

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On this day...

September 30:

1900 - William Elgin Swinton was born in Kirkcaldy, Scotland.
2002 - Robert Masterman Stainforth died.

Evidence for Avian Intrathoracic Air Sacs in a New Predatory Dinosaur from Argentina

Paul C. Sereno, Ricardo N. Martinez, Jeffrey A. Wilson, David J. Varricchio, Oscar A. Alcober, Hans C. E. Larsson

published 30 Sep 2008

Common Avian Infection Plagued the Tyrant Dinosaurs

Ewan D. S. Wolff, Steven W. Salisbury, John R. Horner, David J. Varricchio

published 30 Sep 2009

Cartilaginous Epiphyses in Extant Archosaurs and Their Implications for Reconstructing Limb Function in Dinosaurs

Casey M. Holliday, Ryan C. Ridgely, Jayc C. Sedlmayr, Lawrence M. Witmer

published 30 Sep 2010

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Selected image

A cluster of fossils fossil of the trilobite Homotelus bromidensis. This specimen dates back to the Ordovician period and was discovered in Oklahoma, USA.
Photo credit: High Contrast