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Information about Dicraeosauridae

Dicraeosauridae
Fossil range: Jurassic - Cretaceous
Conservation status
Extinct (fossil)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Superorder:Dinosauria
Suborder:Sauropodomorpha
Superfamily:Diplodocoidea
Family:Dicraeosauridae
Janensch, 1929
Genera
Dicraeosauridae is a family of sauropod dinosaurs known from the Late Jurassic and Early Cretaceous of Africa and South America. Currently only three genera are recognised; the Jurassic South American genus Brachytrachelopan, the Jurassic African Dicraeosaurus and the South American Early Cretaceous Amargasaurus, with its distinctive neck spines. All three animals are small by sauropod standards, with relatively short necks.

McIntosh (1990) includes a number of genera within the subfamily Dicraeasaurinae of the family Diplodocidae, but many of these are now recognised as belonging to distinct families (Nemegtosauridae and Rebbachisauridae).

The group is described cladistically as a stem-based taxon defined as "The most inclusive clade containing Dicraeosaurus hansemanni Janensch 1914 but not Diplodocus longus Marsh 1878" or as "all diplodocoids more closely related to Dicraeosaurus hansemanni than to Diplodocus longus (Sereno 1998 p.63, Upchurch et al. 2004 p.304, Wilson 2005 p.35)

Bibliography

The Jurassic Period is a major unit of the geologic timescale that extends from about 199.6 ± 0.6 Ma (million years ago) to 145.4 ± 4.0 Ma, the end of the Triassic to the beginning of the Cretaceous.
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The Cretaceous Period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic Period (i.e. from 145.5 ± 4.0 million years ago (Ma)) to the beginning of the Paleocene epoch of the Tertiary Period (about 65.5 ± 0.3 Ma).
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conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. Many factors are taken into account when assessing the conservation status of a species: not simply the number remaining, but the
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For other uses of the term, see Fossil (disambiguation)


FOSSIL is a standard for allowing serial communication for telecommunications programs under the DOS operating system.
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Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Editing of this page by unregistered or newly registered users is currently disabled until (UTC) due to vandalism.
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Chordata
Bateson, 1885

Typical Classes

See below

Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Dinosauria *
Owen, 1842

Orders & Suborders
  • Ornithischia
  • Cerapoda
  • Thyreophora
  • Saurischia

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Sauropodomorpha
von Huene, 1932

Infraorders

Prosauropoda
Sauropoda

The Sauropodomorpha were a group of long-necked, herbivorous dinosaurs that eventually dropped down on all fours and became the largest animals that ever walked the earth.
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Diplodocoidea
Marsh, 1884

Families
  • Dicraeosauridae
  • Diplodocidae
  • Rebbachisauridae


Diplodocoidea was a superfamily of sauropod dinosaurs, which included some of the longest animals of all time, including slender giants like
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Werner Ernst Martin Janensch (November 11, 1878 in Herzberg (Elster) - October 20, 1969 in Berlin) was a German paleontologist and geologist. Janensch's most famous contributions stemmed from the expedition he led with Edwin Hennig to the Tendaguru Beds in what is now Tanzania.
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19th century - 20th century - 21st century
1890s  1900s  1910s  - 1920s -  1930s  1940s  1950s
1926 1927 1928 - 1929 - 1930 1931 1932

Year 1929 (MCMXXIX
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genus (plural: genera) is part of the Latinized name for an organism. It is a name which reflects the classification of the organism by grouping it with other closely similar organisms.
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Amargasaurus

Species: A. cazaui

Binomial name
Amargasaurus cazaui
Salgado & Bonaparte, 1991

Amargasaurus
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Dicraeosaurus
Janensch, 1914

Species
  • D. hansemanni (type)
  • D. sattleri Janensch, 1914


Dicraeosaurus (Gr. dikraios "bifurcated, double-headed" + Gr.
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Brachytrachelopan

Binomial name
Brachytrachelopan mesai
Rauhut et al., 2005

Overview and Holotype

Brachytrachelopan
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Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Sauropoda
Marsh, 1878

Families

See text

Sauropoda, the sauropods, are a suborder or infraorder of the saurischian ("lizard-hipped") dinosaurs. They were the largest animals ever to have lived on land.
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Late Jurassic (or Malm) Epoch of the Jurassic Period is the unit of geologic time from 161.2 ± 4.0 to 145.5 ± 4.0 million years ago, which is preserved in Upper Jurassic strata.
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The Early Cretaceous (timestratigraphic name) or the Lower Cretaceous (logstratigraphic name), is the earlier of the two major divisions of the Cretaceous Period. It began about 146 million years ago.
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genus (plural: genera) is part of the Latinized name for an organism. It is a name which reflects the classification of the organism by grouping it with other closely similar organisms.
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Brachytrachelopan

Binomial name
Brachytrachelopan mesai
Rauhut et al., 2005

Overview and Holotype

Brachytrachelopan
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Dicraeosaurus
Janensch, 1914

Species
  • D. hansemanni (type)
  • D. sattleri Janensch, 1914


Dicraeosaurus (Gr. dikraios "bifurcated, double-headed" + Gr.
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Amargasaurus

Species: A. cazaui

Binomial name
Amargasaurus cazaui
Salgado & Bonaparte, 1991

Amargasaurus
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Nemegtosauridae
Barrett & Upchurch, 1995

Genera
  • Nemegtosaurus
  • Bonitasaura
  • Quaesitosaurus
  • Rapetosaurus
  • ?Mongolosaurus


Nemegtosauridae
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Rebbachisauridae
Bonaparte, 1997

Genera
  • Cathartesaura
  • Limaysaurus
  • Nigersaurus
  • Nopcsaspondylus
  • Rayososaurus
  • Rebbachisaurus
Rebbachisauridae
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Cladistics is a philosophy of classification that arranges organisms only by their order of branching in an evolutionary tree and not by their morphological similarity, in the words of Luria et al. (1981).
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The International Code of Phylogenetic Nomenclature, known for short as the PhyloCode, is a developing draft for a formal set of rules governing phylogenetic nomenclature.
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Diplodocus
Marsh, 1878

Species

D. carnegiei Hatcher, 1901
D. hallorum (Gillette, 1991) Lucas et al., 2004
D. hayi Holland, 1924
D.
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Diplodocoidea
Marsh, 1884

Families
  • Dicraeosauridae
  • Diplodocidae
  • Rebbachisauridae


Diplodocoidea was a superfamily of sauropod dinosaurs, which included some of the longest animals of all time, including slender giants like
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Herod_Archelaus


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