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Aegicetus Size
''Aegicetus'' is an extinct genus of protocetid whale based on a partial skull with much of an associated postcranial skeleton discovered in Egypt.Philip D. Gingerich, Mohammed Sameh M. Antar und Iyad S. Zalmot: "''Aegicetus gehennae'', a new late Eocene protocetid (Cetacea, Archaeoceti) from Wadi Al Hitan, Egypt, and the transition to tail-powered swimming in whales". ''PLoS ONE'' 14(12): e0225391 doi:10.1371/journal.pone.0225391 It lived around 35 million years ago (during the Late Eocene), making it the youngest known protocetid to date. ''Aegicetus'' was discovered in 2007 at Wadi El Hitan ( Gehannam Formation) as a relatively complete skeleton and a partial second specimen. They were assigned to a new genus and species in 2019 by Philip D. Gingerich ''et al.'' Description ''Aegicetus'' is a medium-sized whale weighing about , and is reported to have been intermediate in form and functionally transitional in having a larger and more powerful vertebral column of a tail-po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Eocene
The Priabonian is, in the International Commission on Stratigraphy, ICS's geologic timescale, the latest age (geology), age or the upper stage (stratigraphy), stage of the Eocene epoch (geology), Epoch or series (stratigraphy), Series. It spans the time between . The Priabonian is preceded by the Bartonian and is followed by the Rupelian, the lowest stage of the Oligocene. ''Priabona florissantius, Priabona'', an extinct dipteran of Pipunculidae family, is named after Priabonian, the age of deposits from which this insect is known. History and naming The Priabonian Stage was introduced in scientific literature by Ernest Munier-Chalmas and Albert de Lapparent in 1893. The stage is named after the small hamlet of Priabona (Monte di Malo), Priabona in the community of Monte di Malo, in the Veneto region of northern Italy. Stratigraphic definition The base of the Priabonian Stage is at the first appearance datum, first appearance of calcareous nannoplankton species ''Chiasmolithus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegicetus Size
''Aegicetus'' is an extinct genus of protocetid whale based on a partial skull with much of an associated postcranial skeleton discovered in Egypt.Philip D. Gingerich, Mohammed Sameh M. Antar und Iyad S. Zalmot: "''Aegicetus gehennae'', a new late Eocene protocetid (Cetacea, Archaeoceti) from Wadi Al Hitan, Egypt, and the transition to tail-powered swimming in whales". ''PLoS ONE'' 14(12): e0225391 doi:10.1371/journal.pone.0225391 It lived around 35 million years ago (during the Late Eocene), making it the youngest known protocetid to date. ''Aegicetus'' was discovered in 2007 at Wadi El Hitan ( Gehannam Formation) as a relatively complete skeleton and a partial second specimen. They were assigned to a new genus and species in 2019 by Philip D. Gingerich ''et al.'' Description ''Aegicetus'' is a medium-sized whale weighing about , and is reported to have been intermediate in form and functionally transitional in having a larger and more powerful vertebral column of a tail-po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Philip D
In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils Of Egypt
Egypt has many fossil-bearing Geological formation, geologic formations, in which many dinosaurs have been discovered. Scientists *Ernst Stromer *Richard Markgraf, early 1900s, (he died in Sinnuris of Giza in 1916) * A. B. Orlebar, Fayoum 1845 * George Schweinfurth, Geziret al-Qarn in Lake Qarun 1879 & Qasr al-Sagha Formation ancient whale fossils named Zeuglodom osiris. * Hugh Beadnell, Fayoum 1898 * Charles William Andrews, Charles Andrews, 1901, they unearthed a wealth of fossils Palaeomastodon, the oldest known elephant * Eberhard Frass, Fayoum 1905 * Walter W. Granger, Walter Granger & Henry F. Osborn, Fayoum 1907 * Wendell Phillips, 1947 * Elwyn L. Simons, Fayoum 1961–1986 * Thomas M. Bown and David Tab Rasmussen, 1980s Fossils Petrified Wood Fayoum, Petrified wood protectorate in New Cairo, New-Cairo Area/ Cairo-Suez desert road & entire Western Desert (Egypt), Western Desert of Egypt is covered in Petrified wood. This is one of the clues that the region was a tropic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protocetidae
Protocetidae, the protocetids, form a paraphyletic, diverse and heterogeneous group of extinct cetaceans known from Asia, Europe, Africa, South America, and North America. Description There were many genera, and some of these are very well known (e.g., ''Rodhocetus''). Known protocetids had large fore- and hindlimbs that could support the body on land, and it is likely that they lived amphibiously: in the sea and on land. It is unclear at present whether protocetids had flukes (the horizontal tail fin of modern cetaceans). However, what is clear is that they are adapted even further to an aquatic life-style. In ''Rodhocetus'', for example, the sacrum – a bone that in land-mammals is a fusion of five vertebrae that connects the pelvis with the rest of the vertebral column – was divided into loose vertebrae. However, the pelvis retain a sacroiliac joint. Furthermore, the nasal openings are now halfway up the snout; a first step towards the telescoped condition in mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rodhocetus
''Rodhocetus'' (from ''Rodho'', the geological anticline at the type locality, and ''cetus'', Latin for whale) is an extinct genus of protocetid early whale known from the Lutetian of Pakistan. The best-known protocetid, ''Rodhocetus'' is known from two partial skeletons that taken together give a complete image of an Eocene whale that had short limbs with long hands and feet that were probably webbed and a sacrum that was immobile with four partially fused sacral vertebrae. It is one of several extinct whale genera that possess land mammal characteristics, thus demonstrating the evolutionary transition from land to sea. Description left, Size of ''Rodhocetus'' relative to a human. ''Rodhocetus'' was a small whale measuring long. Throughout the 1990s, a close relationship between cetaceans and mesonychians, an extinct group of cursorial, wolf-like ungulates, was generally accepted based on morphological analyses. In the late 1990s, however, cladistic analyses based on molec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sacroiliac Joint
The sacroiliac joint or SI joint (SIJ) is the joint between the sacrum and the ilium bones of the pelvis, which are connected by strong ligaments. In humans, the sacrum supports the spine and is supported in turn by an ilium on each side. The joint is strong, supporting the entire weight of the upper body. It is a synovial plane joint with irregular elevations and depressions that produce interlocking of the two bones. The human body has two sacroiliac joints, one on the left and one on the right, that often match each other but are highly variable from person to person. Structure Sacroiliac joints are paired C-shaped or L-shaped joints capable of a small amount of movement (2–18 degrees, which is debatable at this time) that are formed between the auricular surfaces of the sacrum and the ilium bones. However, mostBogduk, Nicolai "Clinical and Radiological Anatomy of the Lumbar Spine" Elsevier Health Sciences, 2022, p. 172. agree that only slight movements occur on thes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peregocetus
''Peregocetus'' is a genus of early whale that lived in what is now Peru during the Middle Eocene epoch. Its fossil was uncovered in 2011 in the Yumaque Member ( Paracas Formation) of the Pisco Basin at Playa Media Luna by a team consisting of members from Belgium, Peru, France, Italy, and the Netherlands. Parts recovered include the jaw, front and hind legs, bits of spine, and tail. Olivier Lambert, a scientist at the Royal Belgian Institute of Natural Sciences and lead author of the study, noted that ''Peregocetus'' "fills in a crucial nowledgegap" about the evolution of whales and their spread. ''Peregocetus'' is the first recorded quadrupedal whale from the Pacific Ocean and the Southern Hemisphere. The discovery reveals that protocetids reached the Pacific Ocean and attained a near circumequatorial distribution while retaining functional weight-bearing limbs. Description ''Peregocetus'' was essentially a four-legged whale: however, it had webbed feet with small hoov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegicetus - Gingerich Et Al
''Aegicetus'' is an extinct genus of protocetid whale based on a partial skull with much of an associated postcranial skeleton discovered in Egypt.Philip D. Gingerich, Mohammed Sameh M. Antar und Iyad S. Zalmot: "''Aegicetus gehennae'', a new late Eocene protocetid (Cetacea, Archaeoceti) from Wadi Al Hitan, Egypt, and the transition to tail-powered swimming in whales". ''PLoS ONE'' 14(12): e0225391 doi:10.1371/journal.pone.0225391 It lived around 35 million years ago (during the Late Eocene), making it the youngest known protocetid to date. ''Aegicetus'' was discovered in 2007 at Wadi El Hitan ( Gehannam Formation) as a relatively complete skeleton and a partial second specimen. They were assigned to a new genus and species in 2019 by Philip D. Gingerich ''et al.'' Description ''Aegicetus'' is a medium-sized whale weighing about , and is reported to have been intermediate in form and functionally transitional in having a larger and more powerful vertebral column of a tail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Michigan
The University of Michigan (U-M, U of M, or Michigan) is a public university, public research university in Ann Arbor, Michigan, United States. Founded in 1817, it is the oldest institution of higher education in the state. The University of Michigan is one of the earliest American research universities and is a founding member of the Association of American Universities. In the fall of 2023, the university employed 8,189 faculty members and enrolled 52,065 students in its programs. The university is Carnegie Classification of Institutions of Higher Education, classified among "R1: Doctoral Universities – Very high research activity". It consists of nineteen colleges and offers 250 degree programs at the undergraduate and graduate levels. The university is Higher education accreditation in the United States, accredited by the Higher Learning Commission. In 2021, it ranked third among American universities in List of countries by research and development spending, research expe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip D
Philip, also Phillip, is a male name derived from the Greek (''Philippos'', lit. "horse-loving" or "fond of horses"), from a compound of (''philos'', "dear", "loved", "loving") and (''hippos'', "horse"). Prominent Philips who popularized the name include kings of Macedonia and one of the apostles of early Christianity. ''Philip'' has many alternative spellings. One derivation often used as a surname is Phillips. The original Greek spelling includes two Ps as seen in Philippides and Philippos, which is possible due to the Greek endings following the two Ps. To end a word with such a double consonant—in Greek or in English—would, however, be incorrect. It has many diminutive (or even hypocoristic) forms including Phil, Philly, Phillie, Lip, and Pip. There are also feminine forms such as Philippine and Philippa. Philip in other languages * Afrikaans: Filip * Albanian: Filip * Amharic: ፊሊጶስ (Filip'os) * Arabic: فيلبس (Fīlibus), فيليبوس (Fīlī ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gehannam Formation
The Gehannam Formation (or Gar Gehannam) is a formation in Egypt which dates to the Eocene. It is similar in age to the Birket Qarun Formation. Paleobiota Mammals Afrotheres Cetacea Reptiles Crocodylomorphs Fish A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ... Actinopterygians Chondrichthyes References {{Reflist Geologic formations of Egypt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
