|
Glaucidium Ireneae
''Glaucidium ireneae'' is an extinct species of pygmy owl that lived in what is now Gauteng, South Africa during the Early Pleistocene epoch, about 2.5–1.38 million years ago. Discovery and naming In 2020, Italian ornithologist Marco Pavia published a study on fossilized bird remains found at the Kromdraai fossil site in Gauteng, South Africa, in which he reviewed over 800 specimens representing 25 different species from the site. Among these, Pavia noticed that some of the fossils kept in the Evolutionary Studies Institute at the University of the Witwatersrand represented a species of owl unknown to science. After comparisons with the bones of modern owls, he determined that this new species belonged in the genus '' Glaucidium'', and gave it the scientific name ''Glaucidium ireneae''. Pavia chose the specific name "''ireneae''" in honor of Italian ornithologist Irene Pellegrino, who specializes in the study of bird phylogeography, especially that of owlets. Pellegrino support ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Pleistocene
The Early Pleistocene is an unofficial epoch (geology), sub-epoch in the international geologic timescale in chronostratigraphy, representing the earliest division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently estimated to span the time between 2.580 ± 0.005 annum, Ma (million years ago) and 0.773 ± 0.005 Ma. The term Early Pleistocene applies to both the Gelasian, Gelasian Age and the Calabrian (stage), Calabrian Age. While the Gelasian and the Calabrian have officially been defined by the International Union of Geological Sciences (IUGS) to effectively constitute the Early Pleistocene, the succeeding Chibanian and Tarantian ages have yet to be ratified. These proposed ages are unofficially termed the Middle Pleistocene and Late Pleistocene respectively. The Chibanian provisionally spans time from 773 ka to 126 ka, and the Tarantian from then until the definitive end of the whole Pleistocene, c. 9700 BC in the 10th millennium BC. Notes {{Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paratype
In zoology and botany, a paratype is a specimen of an organism that helps define what the scientific name of a species and other taxon actually represents, but it is not the holotype (and in botany is also neither an isotype (biology), isotype nor a syntype). Often there is more than one paratype. Paratypes are usually held in museum research collections. The exact meaning of the term ''paratype'' when it is used in zoology is not the same as the meaning when it is used in botany. In both cases however, this term is used in conjunction with ''holotype''. Zoology In zoological nomenclature, a paratype is officially defined as "Each specimen of a type series other than the holotype.", ''International Code of Zoological Nomenclature'' In turn, this definition relies on the definition of a "type series". A type series is the material (specimens of organisms) that was cited in the original publication of the new species or subspecies, and was not excluded from being type material ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Taxa Described In 2020
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Though the fossil record is incomplete, numerous studies have demonstrated that there is enough information available to give a good understanding of the pattern of diversification of life on Earth. In addition, the record can predict and fill gaps such as the discovery of ''Tiktaalik'' in the arctic of Canada. Paleontology includes the study of fossils: their age, method of formation, and evolutionary significance. Specimens are sometimes considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years to 4.1 billion years old. Early edition, published online before print. The ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaucidium (owl)
Pygmy owls are members of the genus ''Glaucidium''. They belong to the typical owl family, Strigidae. The genus consists of 29 species distributed worldwide. These are mostly small owls, and some of the species are called "owlets". The genus includes nocturnal, diurnal, and crepuscular species. Birds in this genus mainly hunt large insects and other small prey. Taxonomy The genus ''Glaucidium'' was introduced in 1826 by the German zoologist Friedrich Boie. The type species was designated as the Eurasian pygmy owl by George Robert Gray in 1840. The genus name is from Ancient Greek ''glaukidion'' meaning "little owl" or "owlet". It is diminutive of ''glaux'' ''(γλαυξ)'' meaning "owl". A molecular phylogenetic study of the owls published in 2019 found that the widely distributed northern hawk-owl (''Surnia ulula'') is sister to the genus ''Glaucidium''. Species The genus contains 29 living species: * Eurasian pygmy owl (''Glaucidium passerinum'') * Pearl-spotted owlet ('' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Bird Species Described In The 2020s ...
: ''See also parent article Bird species new to science'' This list shall only include newly recognized species and subspecies of birds (living as well as extinct) whose formal description was first published during the period from to . By default, the table was sorted by the "publ-date" and alphabetically by the scientific name. List of species ;Legend to the BGR column See also * List of bird species described in the 2000s * List of bird species described in the 2010s Notes References {{Reflist 2020s The 2020s (pronounced "twenty-twenties" or "two thousand ndtwenties"; shortened to "the '20s" and also known as "The Twenties") is the current decade that began on 1 January 2020, and will end on 31 December 2029. The 2020s began with th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coracoid
A coracoid is a paired bone which is part of the shoulder assembly in all vertebrates except therian mammals (marsupials and placentals). In therian mammals (including humans), a coracoid process is present as part of the scapula, but this is not homologous with the coracoid bone of most other vertebrates. In other tetrapods, it joins the scapula to the front end of the sternum and has a notch on the dorsal surface which, along with a similar notch on the ventral surface of the scapula, forms the socket in which the proximal end of the humerus (upper arm bone) is located. The acrocoracoid process is an expansion adjacent to this contact surface, to which the shoulderward end of the biceps brachii muscle attaches in these animals. In birds (and generally theropods and related animals), the entire unit is rigid and called scapulocoracoid. This plays a major role in bird flight. In other dinosaurs, the main bones of the pectoral girdle were the scapula (shoulder blade) an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cooper's Cave
Cooper's Cave is a series of fossil-bearing breccia filled cavities. The cave is located almost exactly between the well known South African hominid-bearing sites of Sterkfontein and Kromdraai and about northwest of Johannesburg, South Africa and has been declared a South African National Heritage Site. History of investigations Cooper's Cave is now recognised as the fifth richest hominid site in the Cradle of Humankind World Heritage Site (behind Sterkfontein, Swartkrans, Drimolen and Kromdraai) and one of the richest sites for early hominid stone tools of the Developed Olduwan culture. Excavations are still underway at Cooper's and are currently being directed by Christine Steininger and Lee Berger of the Institute for Human Evolution and the Bernard Price Institute for Palaeontological Research at the University of the Witwatersrand The University of the Witwatersrand, Johannesburg (), commonly known as Wits University or Wits, is a multi-campus Public university, publi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pearl-spotted Owlet
The pearl-spotted owlet (''Glaucidium perlatum'') is a small bird of prey found in sub-Saharan Africa. They belong to the Strigidae family, otherwise known as the typical owls or the true owls, which contains most species of owl. As part of the genus ''Glaucidium,'' or pygmy owls'','' they are commonly referred to as 'owlets' due to their diminutive size. Pearl-spotted owlets are brownish and heavily spotted white, with two distinct black false 'eyes' at the back of their head. They are often confused with an African barred owlet. Description The pearl-spotted owlet is one of the smallest owls in Africa with a length of 17 to 21 cm. The females are slightly larger and heavier (100g) than the males (65g). Both males and females have similar plumage colouration. The facial disc is off-white and the eyes are yellow. At the back of the head there are two striking false black 'eyes' with a white outline. The upper parts are cinnamon-brown with white spots. The tail and flight feathers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taung
Taung is a small town situated in the North West Province of South Africa. The name means ''place of the lion'' and was named after Tau, the King of the Barolong people. ''Tau'' is the Tswana word for lion. Taung skull fossil site In 1924, a skull (later named the Taung Child) was discovered by a quarry-worker in the nearby Buxton-limestone quarry. It was described by Raymond Dart in 1925 as the type specimen of ''Australopithecus africanus'' after he received a shipment of mostly fossil baboons, but also containing the skull and face of the child. Surprisingly, it would be many years before Dart would visit Taung to determine the exact location of the find. By that time, lime-mining had destroyed much of the area. Later ''in-situ'' excavations were conducted under the direction of Phillip Tobias and Jeffrey McKee of the University of the Witwatersrand, who worked at the site from approximately 1989 until 1993. Although they failed to find additional hominid specimens, they d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skull
The skull, or cranium, is typically a bony enclosure around the brain of a vertebrate. In some fish, and amphibians, the skull is of cartilage. The skull is at the head end of the vertebrate. In the human, the skull comprises two prominent parts: the neurocranium and the facial skeleton, which evolved from the first pharyngeal arch. The skull forms the frontmost portion of the axial skeleton and is a product of cephalization and vesicular enlargement of the brain, with several special senses structures such as the eyes, ears, nose, tongue and, in fish, specialized tactile organs such as barbels near the mouth. The skull is composed of three types of bone: cranial bones, facial bones and ossicles, which is made up of a number of fused flat and irregular bones. The cranial bones are joined at firm fibrous junctions called sutures and contains many foramina, fossae, processes, and sinuses. In zoology, the openings in the skull are called fenestrae, the most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holotype
A holotype (Latin: ''holotypus'') is a single physical example (or illustration) of an organism used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept. For example, the holotype for the butterfly '' Plebejus idas longinus'' is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany and mycology, an isotype is a duplicate of the holotype, generally pieces from the same individual plant or samples from the same genetic individual. A holotype is not necessarily "ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
