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Punk (mollusc)
''Punk ferox'' is a species of aplacophoran mollusc known from the Homerian Coalbrookdale Formation of England. It is the only species within the genus ''Punk''. Description ''Punk'' is elongate and vermiform, with rounded anterior and posterior ends. The dorsal surface bears a median ridge which widens near the anterior, with a low hump near the midpoint. The flanks of the ridge become more dorsolateral, meeting at the posterior tip of the animal. It lacks valves, instead bearing many long upwards-facing spines (likely mineralised spicules), with these fanning out near the anterior and the anterior margin bearing shorter "head spines". The dorsal surface is better preserved than the ventral, with a sharp margin between the two. The head is short with a subcylindrical boss possibly representing a buccal mass, alongside a sub-semicircular possible anterior plate. The posterior portion of ''Punks trunk bears around 25 subconical projections near the median ridge, likely g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aplacophoran
Aplacophora is a class of small, deep-water, exclusively benthic, marine molluscs found in all oceans of the world. MolluscaBase eds. (2021). MolluscaBase. Aplacophora. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=411 on 2021-04-13 All known modern forms are shell-less: only some extinct primitive forms possessed valves. The group comprises the two classes Solenogastres (Neomeniomorpha) and Caudofoveata (Chaetodermomorpha), which between them contain 28 families and about 320 species. The aplacophorans are traditionally considered ancestral to the other mollusc classes. However, the relationship between the two aplacophoran groups and to the other molluscan classes and to each other is as yet unclear. Aplacophorans are cylindrical and worm-like in form, and most very small, being no longer than ; some species, however, can reach a length of . Habitat Caudofoveates generally burrow into the substrate while soleno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homerian
In the geologic timescale, the Homerian is an age of the Wenlock Epoch of the Silurian Period of the Paleozoic Era of the Phanerozoic Eon that is comprehended between 430.5 ± 0.7 Ma and 427.4 ± 0.5 Ma (million years ago), approximately. The Homerian Age succeeds the Sheinwoodian Age and precedes the Gorstian Age. The name comes from the small village of Homer, Shropshire near Much Wenlock. The defining lower boundary of Homerian rock layers (GSSP A Global Boundary Stratotype Section and Point (GSSP), sometimes referred to as a golden spike, is an internationally agreed upon reference point on a stratigraphic section which defines the lower boundary of a stage on the geologic time scale. ...) is located within the Coalbrookdale Formation of England. References Wenlock epoch Silurian geochronology {{geochronology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coalbrookdale Formation
Coalbrookdale Formation, earlier known as Wenlock Shale or Wenlock Shale Formation and also referred to as Herefordshire Lagerstätte in palaeontology, is a fossil-rich deposit ('' Konservat-Lagerstätte'') in Powys and Herefordshire at the England–Wales border in UK. It belongs to the Wenlock Series of the Silurian Period within the Homerian Age (about 430 million years ago). It is known for its well-preserved fossils of various invertebrate animals many of which are in their three-dimensional structures. Some of the fossils are regarded as earliest evidences and evolutionary origin of some of the major groups of modern animals. Roderick Murchison first described the geological setting of Coalbrookdale Formation by which he gave the name Silurian in 1935, referring to the Silures, a Celtic tribe of Wales. It is assigned to the Wenlock Group in 1978 based on the age of crustacean fossils found around the region. Robert J. King of the University of Leicester discovered the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vermiform
Vermes (" vermin/vermes") is an obsolete taxon used by Carl Linnaeus and Jean-Baptiste Lamarck for non-arthropod invertebrate animals. Linnaeus In Linnaeus's ''Systema Naturae'', the Vermes had the rank of class, occupying the 6th (and last) slot of his animal systematics. It was divided into the following orders, all except the Lithophyta containing (in modern terms) organisms from a variety of phyla: * Intestina, including horsehair worms, earthworms, roundworms, liver flukes, leeches, hagfishes, and shipworms * Mollusca, including slugs, sea slugs, polychaetes, sea mice, priapulids, salps, jellyfish, starfish, and sea urchins * Testacea, including chitons, barnacles, clams, cockles, nautiluses, snails and serpulid worms * Lithophyta, including various corals * Zoophyta, including bryozoans, coralline algae, '' Hydra'', sea pens, tapeworms, and '' Volvox'' Apart from the Mollusca, understood very differently from the modern phylum of that name, Linnaeus includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsolateral
Standard anatomical terms of location are used to describe unambiguously the anatomy of humans and other animals. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and axes. The meaning of terms that are used can change depending on whether a vertebrate is a biped or a quadruped, due to the difference in the neuraxis, or if an invertebrate is a non-bilaterian. A non-bilaterian has no anterior or posterior surface for example but can still have a descriptor used such as proximal or distal in relation to a body part that is nearest to, or furthest from its middle. International organisations have determined vocabularies that are often used as standards for subdisciplines of anatomy. For example, ''Terminologia Anat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spicule (sponge)
Spicules are structural elements found in most Sea sponge, sponges. The meshing of many spicules serves as the sponge's skeleton and thus it provides structural support and potentially defense against predators. Sponge spicules are made of calcium carbonate or Silicon dioxide, silica. Large spicules visible to the naked eye are referred to as megascleres or macroscleres, while smaller, microscopic ones are termed microscleres. The composition, size, and shape of spicules are major characters in sponge systematics and Taxonomy (biology), taxonomy. Overview Sponges are a species-rich clade of the earliest-diverging (most Basal (phylogenetics), basal) animals. They are distributed globally, with diverse ecologies and functions, and a record spanning at least the entire Phanerozoic. Most sponges produce skeletons formed by spicules, structural elements that develop in a wide variety of sizes and three dimensional shapes. Among the four sub-clades of Porifera, three (Demospong ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subcylindrical
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Digestive System Of Gastropods
The digestive system of gastropods has evolved to suit almost every kind of diet and feeding behavior. Gastropods (snails and slugs) as the largest taxonomic class of the mollusca are very diverse: the group includes carnivores, herbivores, scavengers, filter feeders, and even parasites. In particular, the radula is often highly adapted to the specific diet of the various group of gastropods. Another distinctive feature of the digestive tract is that, along with the rest of the visceral mass, it has undergone torsion (gastropod), torsion, twisting around through 180 degrees during the larval stage, so that the anus of the animal is located above its head. A number of species have developed special adaptations to feeding, such as the "drill" of some limpets, or the harpoon of the Neogastropoda, neogastropod genus ''Conus''. Filter feeders use the gills, mantle lining, or nets of mucus to trap their prey, which they then pull into the mouth with the radula. The highly modified para ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Punk Rock
Punk rock (also known as simply punk) is a rock music genre that emerged in the mid-1970s. Rooted in 1950s rock and roll and 1960s garage rock, punk bands rejected the corporate nature of mainstream 1970s rock music. They typically produced short, fast-paced songs with hard-edged melodies and singing styles with stripped-down instrumentation. Punk rock lyrics often explore anti-establishment and Anti-authoritarianism, anti-authoritarian themes. Punk embraces a DIY ethic; many bands self-produce recordings and distribute them through independent record label, independent labels. The term "punk rock" was previously used by American Music criticism, rock critics in the early 1970s to describe the mid-1960s garage bands. Certain late 1960s and early 1970s Detroit acts, such as MC5 and Iggy and the Stooges, and other bands from elsewhere created out-of-the-mainstream music that became highly influential on what was to come. Glam rock in the UK and the New York Dolls from New York ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Unusual Biological Names
This is a list of unusual biological names, given to biological inventions and discoveries. One might consider the listed names unusual due to their containing pop culture references or puns. Genes and proteins In the early days of genomics, genes were often given creative names upon discovery. A nomenclature committee later established naming guidelines, but several early names remain. Controversies Unusual names have caused issues for scientists explaining genetic diseases to lay-people, such as when an individual is affected by a gene with an offensive or insensitive name. This has particularly been noted in patients with a defect in the sonic hedgehog gene pathway and the disease formerly named CATCH22 for "cardiac anomaly, T-cell deficit, clefting and hypocalcaemia for chromosome 22q11.2 microdeletions". This name was abandoned due to the no-win connotations. In 1993 Alfonso Martinez Arias, a researcher at the University of Cambridge, was ordered to change the name of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silurian Molluscs
The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of the Paleozoic Era, and the third of twelve periods of the Phanerozoic Eon. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by a few million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. One important event in this period was the initial establishment of terrestrial life in what is known as the Silurian-Devonian Terrestrial Revolution: vascular plants emerged from more primitive land plants, dikaryan fungi started expanding and diversifying along with glomeromycotan fungi, and three groups of arthropods (myriapods, arachnids and hexapods) became full ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
