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Cretatriacanthidae
Cretatriacanthidae is an extinct family of prehistoric marine Actinopterygii, ray-finned fish from the Late Cretaceous. It contains two genera, both known from southern Europe. Placed in the suborder Plectocretacicoidei alongside several other similar Cretaceous fish genera, they were long considered the earliest members of the extant order Tetraodontiformes. However, a 2024 study found that many of the alleged shared traits were also found among other acanthomorph lineages, and that other traits present within the Plectocretacicoidea, Plectocretacicoidei are not known from modern Tetraodontiformes. For this reason, it considered them instead as basal members of an expanded Acanthuriformes (containing Tetraodontiformes and Anglerfish, Lophiiformes as superorders, among others). Genera *''Cretatriacanthus'' Tyler & Sorbini, 1996 *''Slovenitriacanthus'' Tyler & Križnar, 2013 References Tetraodontiformes Prehistoric ray-finned fish families {{paleo-tetraodontiformes-stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetraodontiformes
Tetraodontiformes (), also known as the Plectognathi, is an order of ray-finned fishes which includes the pufferfishes and related taxa. This order has been classified as a suborder of the order Perciformes, although recent studies have found that it, as the Tetraodontoidei, is a sister taxon to the anglerfish order Lophiiformes, called Lophiodei, and have placed both taxa within the Acanthuriformes. The Tetraodontiformes are represented by 10 extant families and at around 430 species overall. The majority of the species within this order are marine but a few may be found in freshwater. They are found throughout the world. Taxonomy Tetraodontiformes is a name first used for this order in 1940 by Lev Berg, the order was originally proposed in 1817 as the "''Les Plectognathes''", the Plectognathi. Cuvier divided this into two families ''"Les Gymnodontes"'' and ''"Les Sclerodermes"''. In 1940 Berg first used the term Tetraodontiformes for this order and this name is the curren ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plectocretacicoidei
Plectocretacicoidei is an extinct suborder of Actinopterygii belonging to the order Tetraodontiformes, which includes the triggerfishes, filefishes, pufferfishes and related groups. The fishes in this suborder were extant from the Late Cretaceous (Santonian to Campanian) of Italy and Slovenia, both in the former Tethyan region, and are regarded as basal Tetraodontiformes. The classification of the Plectocretacicoidei as a sister group to the Tetraodontiformes has been challenged and many of the characteristics which were used to suggest a close relationship to the Tetraodontiformes are shared with the Lophiiformes, the anglerfishes, and the Lophiiformes and Tetraodontiformes share derived characteristics which are not present in the Plectocretacicoidei. The authors of this study suggest that the taxa included within Plectocretacicoidei are basal members of the Percomorpha. Families ''Plectocretacicoidei'' includes the following families:' * Cretatriacanthidae Cretatriacan ... [...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] |
Cretatriacanthus
''Cretatriacanthus'' is an extinct genus of prehistoric marine ray-finned fish from the Late Cretaceous. It contains a single species, ''C. guidottii'' from the late Campanian or early Maastrichtian of Nardò, Italy. It is generally placed as a basal tetraodontiform, although more recent studies have disputed this, finding it to instead represent an early basal percomorph (under an expanded treatment of Acanthuriformes). It can be distinguished by its tall dorsal fin of elongated spines, which shows similarities to that of the modern genus ''Triacanthus''. Spines are also present on its pelvic fins. See also * Prehistoric fish * List of prehistoric bony fish References † A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species or languages). It is one of the mo ... Monotypic prehistoric ray-finned fish genera Prehi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actinopterygii
Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class (biology), class of Osteichthyes, bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fish fin, fins made of webbings of skin supported by radially extended thin bony spine (zoology), spines called ''lepidotrichia'', as opposed to the bulkier, fleshy lobed fins of the sister taxon, sister clade Sarcopterygii (lobe-finned fish). Resembling folding fans, the actinopterygian fins can easily change shape and wetted area, providing superior thrust-to-weight ratios per movement compared to sarcopterygian and chondrichthyian fins. The fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the articulation (anatomy), articulation between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). The vast majority of actinopterygians are teleosts. By species count, they domi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Wiley & Sons
John Wiley & Sons, Inc., commonly known as Wiley (), is an American Multinational corporation, multinational Publishing, publishing company that focuses on academic publishing and instructional materials. The company was founded in 1807 and produces books, Academic journal, journals, and encyclopedias, in print and electronically, as well as online products and services, training materials, and educational materials for undergraduate, graduate, and continuing education students. History The company was established in 1807 when Charles Wiley opened a print shop in Manhattan. The company was the publisher of 19th century American literary figures like James Fenimore Cooper, Washington Irving, Herman Melville, and Edgar Allan Poe, as well as of legal, religious, and other non-fiction titles. The firm took its current name in 1865. Wiley later shifted its focus to scientific, Technology, technical, and engineering subject areas, abandoning its literary interests. Wiley's son Joh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthuriformes
Acanthuriformes is a large, diverse order of mostly marine ray-finned fishes, part of the Percomorpha clade. In the past, members of this clade were placed in the suborders Acanthuroidea and Percoidea of the order Perciformes, but this treatment is now considered paraphyletic. This order contains many of the iconic tropical reef fish groups, such as surgeonfish, marine angelfish, butterflyfish, rabbitfish, grunts, and snappers. It also contains widespread, economically important food and sport fishes, such as drums, temperate basses, and porgies. The only pelagic member of the group is the louvar. Classification The following classification is based on Eschmeyer's Catalog of Fishes (2025): * Order Acanthuriformes ** Family Gerreidae Bleeker, 1859 (mojarras) ** Family Sillaginidae Richardson, 1846 (sillagos) ** Family Moronidae Jordan & Evermann, 1896 (temperate basses) ** Family Drepaneidae Gill, 1872 (sicklefishes) ** Family Ephippidae Bleeker, 1859 (spadefishes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anglerfish
The anglerfish are ray-finned fish in the order Lophiiformes (). Both the order's common name, common and scientific name comes from the characteristic mode of predation, in which a modified dorsal Fish fin#Ray-fins, fin ray acts as a Aggressive mimicry#Food as an attractant, lure for prey (akin to a human Angling, angler, and likened to a crest or "''wikt:Lophius, lophos''"). The modified fin ray, with the very tip being the Esca (fish anatomy), esca and the length of the structure the Illicium (fish anatomy), illicium, is adapted to attract specific prey items across the families of anglerfish by using different luring methods. Anglerfish occur worldwide. The majority are bottom-dwellers, being demersal fish, while the aberrant deep-sea anglerfish are Pelagic fish, pelagic, (mostly) living high in the water column. Some live in the Deep-sea fish, deep sea (such as the deep-sea anglerfish and sea toads), while others live in Shallow water marine environment, shallower waters, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Ray-finned Fish Families
Prehistory, also called pre-literary history, is the period of human history 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 written records there could be no history. The most common conception today is that history is based on evidence, however the concept of prehistory hasn't been completely discarded. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santonian First Appearances
The Santonian is an age in the geologic timescale or a chronostratigraphic stage. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series. It spans the time between 86.3 ± 0.7 mya (million years ago) and 83.6 ± 0.7 mya. The Santonian is preceded by the Coniacian and is followed by the Campanian.Gradstein ''et al.'' (2004) Stratigraphic definition The Santonian Stage was established by French geologist Henri Coquand in 1857. It is named after the city of Saintes in the region of Saintonge, where the original type locality is located. The base of the Santonian Stage is defined by the appearance of the inoceramid bivalve ''Cladoceramus undulatoplicatus''. The GSSP (official reference profile) for the base of the Santonian Stage is located near Olazagutia, Spain; it was ratified by the Subcommission on Cretaceous Stratigraphy in 2012. The Santonian's top (the base of the Campanian Stage) is informally marked by the extinction of the crinoid '' Marsupites te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
