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Concavus Concavus
''Concavus'' is a genus of barnacles. Species , WoRMS recognizes the following two species: * '' Concavus concavus'' (Bronn, 1831) — Pliocene–early Pleistocene; Western Europe. * '' Concavus crassostricola'' Zullo, 1984 — Early Miocene; North Carolina and northern Florida. Taxonomic history The genus was circumscribed by William A. Newman in 1982. His original list of subgenera and species for the genus was the following: * ''Concavus'' genus ** ''Concavus'' subgenus *** '' C. concavus'' ** ''Menesiniella'' subgenus *** ''C. (M.) aquila'' *** ''C. (M.) regalis'' ** ''Arossia'' subgenus *** ''C. (A.) panamensis'' **** ''C. (A.) p. panamensis'' **** ''C. (A.) p. eyerdami'' *** ''C. (A.) henryae'' Newman noted there were multiple fossil taxa in this genus, but didn't classify any except for the type species ''C. concavus''. In 1992, Victor A. Zullo revised the genus. He created a new subfamily, Concavinae, with '' Tamiosoma'' (the senior synonym of '' Menesinie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barnacle
A barnacle is a type of arthropod constituting the subclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive settings. They are sessile (nonmobile) and most are suspension feeders, but those in infraclass Rhizocephala are highly specialized parasites on crustaceans. They have four nektonic (active swimming) larval stages. Around 1,000 barnacle species are currently known. The name is Latin, meaning "curl-footed". The study of barnacles is called cirripedology. Description Barnacles are encrusters, attaching themselves temporarily to a hard substrate or a symbiont such as a whale ( whale barnacles), a sea snake ('' Platylepas ophiophila''), or another crustacean, like a crab or a lobster (Rhizocephala). The most common among them, "acorn barnacles" ( Sessilia), are sessile where they grow their shells directly onto the substrate. Peduncul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WoRMS
Worms may refer to: *Worm, an invertebrate animal with a tube-like body and no limbs Places *Worms, Germany, a city **Worms (electoral district) *Worms, Nebraska, U.S. *Worms im Veltlintal, the German name for Bormio, Italy Arts and entertainment * ''Worms'' (film), a 2013 Brazilian animated film * ''Worms'' (series), a series of video games, including: ** ''Worms'' (1995 video game), the first game in the series ** ''Worms'' (2007 video game), for Xbox Live Arcade, PlayStation Network, and iOS *''Worms?'', 1983 computer game Other uses *Worms (infection), common name for Helminthiasis *Parasitic worms (other) *Worms (surname), a surname *World Register of Marine Species (WoRMS) See also * *Worm (other) * Diet of Worms (other) *Worms & Cie Sequana Capital was a French pulp and paper company. History The company was founded as a coal importing business known as Worms and Cie in 1848. After diversifying into banking and finance it acquired Arjo W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concavus Concavus
''Concavus'' is a genus of barnacles. Species , WoRMS recognizes the following two species: * '' Concavus concavus'' (Bronn, 1831) — Pliocene–early Pleistocene; Western Europe. * '' Concavus crassostricola'' Zullo, 1984 — Early Miocene; North Carolina and northern Florida. Taxonomic history The genus was circumscribed by William A. Newman in 1982. His original list of subgenera and species for the genus was the following: * ''Concavus'' genus ** ''Concavus'' subgenus *** '' C. concavus'' ** ''Menesiniella'' subgenus *** ''C. (M.) aquila'' *** ''C. (M.) regalis'' ** ''Arossia'' subgenus *** ''C. (A.) panamensis'' **** ''C. (A.) p. panamensis'' **** ''C. (A.) p. eyerdami'' *** ''C. (A.) henryae'' Newman noted there were multiple fossil taxa in this genus, but didn't classify any except for the type species ''C. concavus''. In 1992, Victor A. Zullo revised the genus. He created a new subfamily, Concavinae, with '' Tamiosoma'' (the senior synonym of '' Menesinie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Pleistocene
The Early Pleistocene is an unofficial sub-epoch in the international geologic timescale in chronostratigraphy, being 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 Ma (million years ago) and 0.773 ± 0.005 Ma. The term Early Pleistocene applies to both the Gelasian Age (to 1.800 ± 0.005 Ma) and the 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 The Late Pleistocene is an unofficial Age (geology), age in the international geologic timescale in chronostratigraphy, also known as Upper Pleistocene from a Stratigraphy, stratigraphic perspective. It is intended to be the fourth div ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concavus Crassostricola
''Concavus'' is a genus of barnacles. Species , WoRMS recognizes the following two species: * ''Concavus concavus'' (Bronn, 1831) — Pliocene–early Pleistocene; Western Europe. * '' Concavus crassostricola'' Zullo, 1984 — Early Miocene; North Carolina and northern Florida. Taxonomic history The genus was circumscribed by William A. Newman in 1982. His original list of subgenera and species for the genus was the following: * ''Concavus'' genus ** ''Concavus'' subgenus *** '' C. concavus'' ** ''Menesiniella'' subgenus *** ''C. (M.) aquila'' *** ''C. (M.) regalis'' ** ''Arossia'' subgenus *** ''C. (A.) panamensis'' **** ''C. (A.) p. panamensis'' **** ''C. (A.) p. eyerdami'' *** ''C. (A.) henryae'' Newman noted there were multiple fossil taxa in this genus, but didn't classify any except for the type species ''C. concavus''. In 1992, Victor A. Zullo revised the genus. He created a new subfamily, Concavinae, with '' Tamiosoma'' (the senior synonym of '' Menesiniel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Miocene
The Early Miocene (also known as Lower Miocene) is a sub-epoch of the Miocene Epoch made up of two stages: the Aquitanian and Burdigalian stages. The sub-epoch lasted from 23.03 ± 0.05 Ma to 15.97 ± 0.05 Ma (million years ago). It was preceded by the Oligocene epoch. As the climate started to get cooler, the landscape started to change. New mammals evolved to replace the extinct animals of the Oligocene epoch. The first members of the hyena and weasel family started to evolve to replace the extinct ''Hyaenodon'', entelodonts and bear-dogs. The chalicotheres survived the Oligocene epoch. A new genus of entelodont called ''Daeodon'' evolved in order to adapt to the new habitats and hunt the new prey animals of the Early Miocene epoch; it quickly became the top predator of North America. But it became extinct due to competition from '' Amphicyon'', a newcomer from Eurasia. ''Amphicyon'' bested ''Daeodon'' because the bear-dog Amphicyonidae is an extinct family of terrestr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circumscription (taxonomy)
In biological taxonomy, circumscription is the content of a taxon, that is, the delimitation of which subordinate taxa are parts of that taxon. If we determine that species X, Y, and Z belong in Genus A, and species T, U, V, and W belong in Genus B, those are our circumscriptions of those two genera. Another systematist might determine that T, U, V, W, X, Y, and Z all belong in genus A. Agreement on circumscriptions is not governed by the Codes of Zoological or Botanical Nomenclature, and must be reached by scientific consensus. A goal of biological taxonomy is to achieve a stable circumscription for every taxon. This goal conflicts, at times, with the goal of achieving a natural classification that reflects the evolutionary history of divergence of groups of organisms. Balancing these two goals is a work in progress, and the circumscriptions of many taxa that had been regarded as stable for decades are in upheaval in the light of rapid developments in molecular phylogenetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Menesiniella
''Menesiniella'' is a genus of the barnacle family Balanidae The Balanidae comprise a family of barnacles of the order Balanomorpha. As a result of research published in 2021 by Chan et al., the members of the family Archaeobalanidae were merged with this family. Genera These genera belong to the family B ... that includes the following species: *'' Menesiniella advena'' Zullo, 1992 *'' Menesiniella aquila'' (Pilsbry, 1907) *'' Menesiniella regalis'' (Pilsbry, 1916) References External links * Barnacles {{Maxillopoda-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arossia
''Arossia'' is a genus of barnacles belonging to the family Balanidae The Balanidae comprise a family of barnacles of the order Balanomorpha. As a result of research published in 2021 by Chan et al., the members of the family Archaeobalanidae were merged with this family. Genera These genera belong to the family B .... The species of this genus are found in Northern and Central America. Species: *'' Arossia ashleyensis'' *'' Arossia aurae'' *'' Arossia bohaska'' *'' Arossia cummembrana'' *'' Arossia eyerdami'' *'' Arossia glyptopoma'' *'' Arossia henryae'' *'' Arossia newmani'' *'' Arossia panamensis'' *'' Arossia rubra'' *'' Arossia sendaica'' References {{Taxonbar, from=Q18581870 Barnacles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Record
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''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absolu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
