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Komoksodon
''Komoksodon'' is an extinct genus of hexanchiform shark known from the Late Cretaceous to the Paleocene. It is the only member of the monotypic family Komoksodontidae. It is represented by a single known species, ''K. kwutchakuth'' from the Campanian Northumberland Formation of Canada. However, teeth have also been identified from the Campanian of Angola and the m iddle Paleocene of New Zealand, suggesting that ''Komoksodon'' briefly survived the Cretaceous-Paleogene extinction. All these localities appear to be deep-water habitats, suggesting that ''Komoksodon'' was a deep-water specialist much like other hexanchiforms. The New Zealand teeth were previously assigned to the orthacodontid '' Sphenodus'' before being reanalyzed prior to the genus's description, and likely represent an undescribed taxon due to certain morphological differences from the Canadian species. The teeth can be distinguished from all other extant and extinct sharks by their highly distinctive and comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexanchiformes
The Hexanchiformes Help:IPA/English, /hɛkˈsæŋkɪfɔːrmiːz/ are a primitive Order (biology), order of sharks, numbering just five extant species in two Family (biology), families, Chlamydoselachidae and Cow shark, Hexanchidae. Chlamydoselachidae are also known as frilled sharks, these sharks are very rare fishes and typically reside in deeper waters. Hexanchidae are also known as cow sharks and are the lesser known of the two types of Hexanchiformes and also reside in deep waters. Taxonomy Due to their primitive anatomy, hexanchiforms were previously considered the most Basal (phylogenetics), basal group of sharks. However, more recent phylogenetic studies indicate that while primitive, they in fact belong to the superorder Squalomorphi, which also contains Squalidae, dogfishes, angelsharks, and sawsharks, although they are thought to be the most basal member of the group. Description Hexanchiform sharks have one spineless dorsal fin located over or behind the pelvic fin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northumberland Formation
The Northumberland Formation is a Late Cretaceous (?Campanian-?Maastrichtian)-aged geologic Formation (geology), formation in Canada. It belongs to the larger Nanaimo Group. Indeterminate bird and pterosaur fossils have been recovered from the formation, as well as a potential Gladius (cephalopod), gladius of ''Eromangateuthis''. An extensive diversity of Shark tooth, shark teeth is known from the formation; many appear to be closely allied with modern deep-water shark taxa, suggesting a deep-water environment for the formation. The most well-known exposures of the formation are on Hornby Island. Vertebrate paleofauna Cartilaginous fish Source: Hybodontiformes Hexanchiformes Echinorhiniformes Squaliformes Pristiophoriformes Orectolobiformes Lamniformes Synechodontiformes Carcharhiniformes Bony fish Birds Pterosaurs Squamates Invertebrate paleofauna Molluscs Cephalopods Gastropods Crustaceans Paleoflora G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orthacodontidae
Orthacodontidae is an extinct family of shark Sharks are a group of elasmobranch cartilaginous fish characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the ...s. It is disputed as to whether it belongs to the modern shark order Hexanchiformes, or the extinct order Synechodontiformes.'''' It contains two genera. Some other authors included it in Lamniformes. Species * '' Occitanodus'' Guinot, Cappetta & Adnet, 2014 ** '' Occitanodus sudrei'' Guinot, Cappetta & Adnet, 2014 * '' Sphenodus'' Agassiz, 1843 ** '' Sphenodus alpinus'' Gümbel, 1861 ** '' Sphenodus longidens'' Agassiz, 1843 ** '' Sphenodus lundgreni'' Davis, 1890 ** '' Sphenodus macer'' Quenstedt, 1852 ** '' Sphenodus nitidus'' Wagner, 1862 ** '' Sphenodus planus'' Agassiz, 1843 ** '' Sphenodus rectidens'' Emmons, 1858 ** '' Sphenodus robustidens'' Seguenza, 1900 ** '' Sphe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleocene Sharks
The Paleocene ( ), or Palaeocene, is a geological epoch that lasted from about 66 to 56 million years ago (mya). It is the first epoch of the Paleogene Period in the modern Cenozoic Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by an asteroid impact (Chicxulub impact) and possibly volcanism (Deccan Traps), marked the beginning of the Paleocene and killed off 75% of species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Paleocene, the continents of the Northern Hemisphere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous Sharks
The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 77.1 million years, it is the ninth and longest geological period of the entire Phanerozoic. The name is derived from the Latin , 'chalk', which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation . The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was largely ice-free, although there is some evidence of brief periods of glaciation during the cooler first half, and forests extended to the poles. Many of the dominant taxonomic groups present in modern times can be ultimately traced back to origins in the C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils Of British Columbia
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] |
Prehistoric Shark Genera
Prehistory, also called pre-literary history, is the period of human history Human history or world history is the record of humankind from prehistory to the present. Early modern human, Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers. They Early expansions of hominin ... between the first known use of stone tools by hominins million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared years ago. It took thousands of years for writing systems to be widely adopted, with writing having spread to almost all cultures by the 19th century. The end of prehistory therefore came at different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. It is based on an old conception of history that without ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comox Language
The Comox language () is a Coast Salish language historically spoken in the northern Georgia Strait region, spanning the east coast of Vancouver Island and the northern Sunshine Coast and adjoining inlets and islands. More specifically, was traditionally spoken in Bute Inlet (also known as Church House), in Squirrel Cove (also known as Cortez Island), and in Sliammon, located in the area now known as Powell River. The term is not a Comox word, but rather a Kwak'wala term meaning "plenty", "abundance", or "wealth”. means “the language of our people” in Sliammon, Klahoose, and Homalco languages. Status As of 1983, only two L1 speakers of the Island Comox were surviving, an aunt and niece, the aunt born in 1900. (Kennedy and Bouchard, 23). Powell River, Campbell River, and Cortez island have started projects to help save . Children in daycare and preschool are being taught in schools on Cortez Island, Campbell River (the current city where many of the Homalco people ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Columbia
British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, forests, lakes, mountains, inland deserts and grassy plains. British Columbia borders the province of Alberta to the east; the territories of Yukon and Northwest Territories to the north; the U.S. states of Washington (state), Washington, Idaho and Montana to the south, and Alaska to the northwest. With an estimated population of over 5.7million as of 2025, it is Canada's Population of Canada by province and territory, third-most populous province. The capital of British Columbia is Victoria, British Columbia, Victoria, while the province's largest city is Vancouver. Vancouver and its suburbs together make up List of census metropolitan areas and agglomerations in Canada, the third-largest metropolit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kʼómoks
The Kʼómoks or Kʼomoks, usually known in English as the Comox, are an Indigenous group of Coast Salishan-speaking people in Comox, British Columbia and in Toba Inlet and the Malaspina Peninsula areas of the British Columbia mainland across Georgia Strait. They historically spoke the Komox language (Comox-Sliammon), and were divided in two main dialect and tribal groupings, which are known by academics as ''Island Comox'' and ''Mainland Comox''. The Island Comox of Vancouver Island now centered in the area of Courtenay- Comox, were historically the greatest and most powerful Kʼómoks group; both - Kʼómoks together with the neighboring Pentlatch (Puntletch / Puntledge) - were referring in their original language to their cultural collective as Sathloot, known to the Mainland Comox as the θaɬaθtuxʷ. After being conquered and politically dominated by southward moving warring Laich-kwil-tach (Ligwiłdaʼxw) (sometimes known as "Southern Kwakiutl") they refer today in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlamydoselachidae
Chlamydoselachidae is a family of primitive deep-sea sharks in the order Hexanchiformes. They are one of only two extant families in the order alongside the cow sharks in the family Hexanchidae, and the only members of the suborder Chlamydoselachoidei. They are now represented only by two extant species in the genus '' Chlamydoselachus'': the frilled shark (''C. anguineus'') and the Southern African frilled shark (''C. africana''). However, they are thought to have been more diverse during the Late Cretaceous, where all three extant and extinct genera are known, and one other genus (''Rolfodon'') survived up to the Pliocene. The earliest remains of the family are indeterminate teeth from the Turonian of Japan. Members of this family appear to have always been closely associated with deep-sea habitats. Some extinct taxa such as ''Rolfodon goliath'' and ''Dykeius'' could grow to very large sizes. Species The following taxa are known: * '' Chlamydoselachus'' Garman, 1884 ** ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
