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Dharragarra Aurora
''Dharragarra'' (meaning "platypus" in the Gamilaraay language) is an extinct genus of monotreme mammal from the Late Cretaceous (Cenomanian) Griman Creek Formation of Australia. The genus contains a single species, ''D. aurora'', known from a partial left mandibular ramus. ''Dharragarra'' was likely more closely related to the living platypus than many other monotremes of the Cretaceous. Discovery and naming The ''Dharragarra'' holotype specimen, AM F97262, was discovered in 2002 in sediments of the Griman Creek Formation (Wallangulla Sandstone Member) near Lightning Ridge, New South Wales, Australia. The specimen consists of a partial left horizontal mandibular ramus. This bone was first mentioned by Anne Musser in part of a 2013 publication, where it was identified as a steropodontid. In a 2022 monotreme evolution review, Flannery et al. alluded to it as an unnamed new genus of stem-ornithorhynchid. In 2024, Flannery et al. described ''Dharragarra aurora'' as a new gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Aus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steropodontid
''Steropodon'' is a genus of prehistoric platypus-like monotreme, or egg-laying mammal. It contains a single species, ''Steropodon galmani'', that lived about 100.2–96.6 million years ago during the Cretaceous period, from early to middle Cenomanian. It is one of the oldest monotremes discovered, and is one of the oldest Australian mammal discoveries. Several other monotremes are known from the Griman Creek Formation, including ''Dharragarra'', ''Kollikodon'', ''Opalios'', ''Parvopalus'', and ''Stirtodon''. Taxonomy The dentition of ''Steropodon'' is somewhat similar to that of therians—the placentals and the marsupials—specifically the presence of the tribosphenic molar tooth which was thought to be exclusive to therians since the Cretaceous. This, along with the tribosphenic molar discoveries of monotreme-relatives ''Ausktribosphenos'' and ''Ambondro mahabo'' of which the latter evolved in the Jurassic, led to the conclusion that the molar evolved independently in the tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stirtodon
''Stirtodon'' is an extinct genus of monotreme mammal from the Late Cretaceous (Cenomanian) Griman Creek Formation of Australia. The genus contains a single species, ''S. elizabethae'', known from a large isolated premolar. ''Stirtodon'' may be the largest toothed monotreme discovered. Several other monotremes are known from the Griman Creek Formation, including ''Dharragarra'', ''Kollikodon'', '' Opalios'', '' Parvopalus'', and ''Steropodon ''Steropodon'' is a genus of prehistoric platypus-like monotreme, or Oviparity, egg-laying mammal. It contains a single species, ''Steropodon galmani'', that lived about 100.2–96.6 million years ago during the Cretaceous period, from early to m ...''. References {{Taxonbar, from1=Q104521351, from2=Q126125973 Prehistoric monotremes Prehistoric mammal genera Cenomanian life Cretaceous mammals of Australia Fossil taxa described in 2020 Mammals described in 2020 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steropodon
''Steropodon'' is a genus of prehistoric platypus-like monotreme, or Oviparity, egg-laying mammal. It contains a single species, ''Steropodon galmani'', that lived about 100.2–96.6 million years ago during the Cretaceous period, from early to middle Cenomanian. It is one of the oldest monotremes discovered, and is one of the oldest Australian mammal discoveries. Several other monotremes are known from the Griman Creek Formation, including ''Dharragarra'', ''Kollikodon'', ''Opalios'', ''Parvopalus'', and ''Stirtodon''. Taxonomy The dentition of ''Steropodon'' is somewhat similar to that of therians—the Placentalia, placentals and the marsupials—specifically the presence of the tribosphenic molar tooth which was thought to be exclusive to therians since the Cretaceous. This, along with the tribosphenic molar discoveries of monotreme-relatives ''Ausktribosphenos'' and ''Ambondro mahabo'' of which the latter evolved in the Jurassic, led to the conclusion that the Molar (tooth), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kollikodon
''Kollikodon'' is an extinct species of mammal, considered to be an early monotreme. It is known only from an opalised dentary fragment, with one premolar and two molars '' in situ'', as well as a referred maxillary fragment containing the last premolar and all four molars. The fossils were found in the Griman Creek Formation at Lightning Ridge, New South Wales, Australia. ''Kollikodon'' lived in the Late Cretaceous period, during the Cenomanian age (99–96 million years ago). Several other monotremes are known from the Griman Creek Formation, including '' Dharragarra'', '' Opalios'', '' Parvopalus'', '' Steropodon'', and '' Stirtodon''. Etymology ''Kollix'' is an ancient Greek word (κολλίξ) for a bread roll. The strange teeth of ''Kollikodon'', when seen from above, resemble hot cross buns, traditionally toasted and eaten on Good Friday. Originally, Michael Archer wanted to name it "Hotcrossbunodon", but met disapproval from his associates. Description Like ''Ste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academic Publishing
Academic publishing is the subfield of publishing which distributes Research, academic research and scholarship. Most academic work is published in academic journal articles, books or Thesis, theses. The part of academic written output that is not formally published but merely printed up or posted on the Internet is often called "grey literature". Most scientific and scholarly journals, and many academic and scholarly books, though not all, are based on some form of academic peer review, peer review or editorial refereeing to qualify texts for publication. Peer review quality and selectivity standards vary greatly from journal to journal, publisher to publisher, and field to field. Most established academic disciplines have their own journals and other outlets for publication, although many academic journals are somewhat interdisciplinarity, interdisciplinary, and publish work from several distinct fields or subfields. There is also a tendency for existing journals to divide into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parvopalus
''Parvopalus'' (meaning "small opal") is an extinct genus of monotreme mammal from the Late Cretaceous (Cenomanian) Griman Creek Formation of Australia. The genus contains a single species, ''P. clytiei'', known from a partial left dentary. Discovery and naming The ''Parvopalus'' holotype specimen, AM F161198, was discovered in 1999 in sediments of the Griman Creek Formation (Wallangulla Sandstone Member) near Lightning Ridge, New South Wales, Australia. The specimen consists of part of the left dentary. In 2024, Flannery et al. described ''Parvopalus clytiei'' as a new genus and species of early monotreme based on these fossil remains. The generic name, ''Parvopalus'', combines the Latin words "parvus", meaning "small", and "opalus", meaning "opal", referencing the opalized preservation style of the holotype. The specific name, ''clytiei'', honours Clytie Smith who has found several opal fossils near the type locality. Several other monotremes are known from the Grima ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opalios
''Opalios'' (meaning "opal") is an extinct genus of monotreme mammal from the Late Cretaceous (Cenomanian) Griman Creek Formation of Australia. The genus contains a single species, ''O. splendens'', known from a fragmentary left dentary. Discovery and naming The ''Opalios'' holotype specimen, AM F132596–AM F132599, was discovered in 2001 in sediments of the Griman Creek Formation (Wallangulla Sandstone Member) near Lightning Ridge, New South Wales, Australia. The specimen consists of four broken pieces of the left dentary. In 2024, Flannery et al. described ''Opalios splendens'' as a new genus and species of early monotreme based on these fossil remains. They erected the new monotypic family Opalionidae within the Ornithorhynchoidea—the superfamily also containing modern echidnas and platypus—to house ''Opalios'' due to its similarity to both of these extant lineages. The generic name, ''Opalios'', is a Greek word meaning "opal", referencing the holotype's opalize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latin
Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area around Rome, Italy. Through the expansion of the Roman Republic, it became the dominant language in the Italian Peninsula and subsequently throughout the Roman Empire. It has greatly influenced many languages, Latin influence in English, including English, having contributed List of Latin words with English derivatives, many words to the English lexicon, particularly after the Christianity in Anglo-Saxon England, Christianization of the Anglo-Saxons and the Norman Conquest. Latin Root (linguistics), roots appear frequently in the technical vocabulary used by fields such as theology, List of Latin and Greek words commonly used in systematic names, the sciences, List of medical roots, suffixes and prefixes, medicine, and List of Latin legal terms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aurora
An aurora ( aurorae or auroras), also commonly known as the northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in Earth's sky, predominantly observed in high-latitude regions (around the Arctic and Antarctic). Auroras display dynamic patterns of radiant lights that appear as curtains, rays, spirals or dynamic flickers covering the entire sky. Auroras are the result of disturbances in the Earth's magnetosphere caused by enhanced speeds of solar wind from coronal holes and coronal mass ejections. These disturbances alter the trajectories of charged particles in the magnetospheric plasma. These particles, mainly electrons and protons, precipitate into the upper atmosphere ( thermosphere/exosphere). The resulting ionization and excitation of atmospheric constituents emit light of varying color and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Name (zoology)
In zoological nomenclature, the specific name (also specific epithet, species epithet, or epitheton) is the second part (the second name) within the scientific name of a species (a binomen). The first part of the name of a species is the name of the genus or the generic name. The rules and regulations governing the giving of a new species name are explained in the article species description. For example, the scientific name for humans is ''Homo sapiens'', which is the species name, consisting of two names: ''Homo'' is the " generic name" (the name of the genus) and ''sapiens'' is the "specific name". Etymology Historically, ''specific name'' referred to the combination of what are now called the generic and specific names. Carl Linnaeus, who formalized binomial nomenclature, made explicit distinctions between specific, generic, and trivial names. The generic name was that of the genus, the first in the binomial, the trivial name was the second name in the binomial, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neontology
Neontology is a part of biology that, in contrast to paleontology, studies and deals with living (or, more generally, '' recent'') organisms. It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members still alive, as opposed to (all) being extinct. For example: * The Indian elephant (''Elephas maximus'') is an extant species, and the woolly mammoth (''Mammuthus primigenius'') is an extinct species. * The moose (''Alces alces'') is an extant species, and the Irish elk (''Megaloceros giganteus'') is an extinct species. * In the group of molluscs known as the cephalopods, there were approximately 600 extant species and 7,500 extinct species. A taxon can be classified as extinct if it is broadly agreed or certified that no members of the group are still alive. Conversely, an extinct taxon can be reclassified as extant if there are new discoveries of living species (" Lazarus species"), or if previously known extant species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
