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Calymenidae
Calymenidae is a family of trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the ...s, containing the following genera: *'' Alcymene'' *'' Apocalymene'' *'' Arcticalymene'' *'' Calymene'' *'' Calymenella'' *'' Calymenesum'' *'' Colpocoryphe'' *'' Dekalymene'' *'' Diacalymene'' *'' Flexicalymene'' *'' Gravicalymene'' *'' Limbocalymene'' *'' Linguocalymene'' *'' Liocalymene'' *'' Metacalymene'' *'' Neseuretinus'' *'' Neseuretus'' *'' Nipponocalymene'' *'' Onnicalymene'' *'' Papillicalymene'' *'' Paracalymene'' *'' Platycalymene'' *'' Pradoella'' *'' Protocalymene'' *'' Reacalymene'' *'' Reedocalymene'' *'' Salterocoryphe'' *'' Sarrabesia'' *'' Spathacalymene'' *'' Sthenarocalymene'' *'' Tapinocalymene'' *'' Thelecalymene'' *'' Vietnamia'' References Calymenina Trilobite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravicalymene
''Gravicalymene'' Shirley, 1936, is a genus of trilobites belonging to the order Phacopida, suborder Calymenina and family Calymenidae. Species included in this genus have previously been allocated to '' Calymene'' Brongniart 1822,'' Flexicalymene'' Shirley, 1936. and '' Sthenarocalymene'' Siveter 1977. Rarest within the genus is the Middle Ordovician species ''Gravicalymene magnotuberculata'', which is also amongst the rarest of all Calymenidae and regionally confined to two exposures in New York State. ''G. magnotuberculata'' is noted for its extremely pustulose exoskeleton, bell-shaped glabella and lack of complete articulated specimens. Type species * '' Gravicalymene convolva'' Shirley 1936, by original designation. Found only in the Birdshill Limestone (Pusgillian or lowest Cautleyan Stage) at Birdshill Quarry, near Llandeilo, South Wales. Other species Some known species and locations include: * '' Gravicalymene arcuata'' Price, 1982. Rawtheyan Stage, Dolhir Formation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flexicalymene
''Flexicalymene'' Shirley, 1936. is a genus of trilobites belonging to the order Phacopida, suborder Calymenina and Family Calymenidae. ''Flexicalymene'' specimens can be mistaken for '' Calymene'', ''Gravicalymene'', '' Diacalymene'' and a few other Calymenina genera. They are used as an index fossil in the Ordovician. Ohio and North America are particularly known for being rich with ''Flexicalymene'' fossils. Diagnosis "Glabella parabolic to bell-shaped in outline, with three or four lateral lobes and furrows. Lacks buttress(es) from fixed cheek to lateral glabellar lobe(s). Does not have preglabellar field. No distinct crescentic area outside lateral lobe l p. Facial sutures gonatoparian (exceptionally, can be proparian in Flexicalymene). Genal spines absent. Hypostome without discrete protuberance on anterior lobe of median body." (Siveter, 1976, p.353) Type species * ''Flexicalymene caractaci'' ( Salter, 1865). By original designation and by monotypy, ''Calymene blumenb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacalymene
Metacalymene is a genus of trilobites in the order Phacopida, family Calymenidae. This genus is considered monotypic, containing only the type species: * ''Metacalymene baylei'' Barrande, 1846. These trilobites were nektobenthic detritivore. They lived in the Silurian period in the Ludlow epoch, from 422.9 ± 1.5 to 418.7 ± 2.8 million years ago. Distribution Silurian of the Czech Republic. ReferencesBiolib in the Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms.
History
The Paleobiology Database (PBDB) originated in the NCE ...
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Colpocoryphe
''Colpocoryphe'' is a genus of trilobites in the family Calymenidae Calymenidae is a family of trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the .... Morphology * Convex Cephalon * Trapezoidal glabellae, frequently distinctly furrowed and surelevated compared to the axis. * Dorsal furrows slightly convergent forwardly with almost linear anterior parts. : Broad dorsal furrows, deep and not well defined. : 3, rather 4, well defined lateral furrows * Librigenæ without lateral area or lateral furrow. * Preglabellar field very short, downward oriented. * Inflated occipital ring with smooth lateral ends. * Occipital furrow broad and deep. * Eye ridges rather weak. * Anterior cephalic notch marked, with frequently parallel edges. * Thorax : Strongly convex axis. * Triangular Pygidium * Convex axis, with segmentation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apocalymene
''Apocalymene'' is a genus of trilobite in the order Phacopida, which existed in what is now Australia. It was described by Chatterton & Campbell in 1980, and the type species is ''Apocalymene copinsensis''. P.A. Jell and J.M. Adrain. References External links ''Apocalymene'' at the Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classificati ...
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Arcticalymene
''Arcticalymene'' is a genus of trilobites found in Silurian-aged marine strata of Arctic Canada and Central Victoria, Australia. The Canadian species are named after each of the Sex Pistols: ''A. cooki'' (Paul Cook), ''A. jonesi'' ( Steve Jones), ''A. matlocki'' (Glen Matlock), ''A. rotteni'' (Johnny Rotten) and ''A. viciousi'' (Sid Vicious), all named by Adrain and Edgecombe in 1997. See also *List of organisms named after famous people (born 1950–present) In biological nomenclature, organisms often receive scientific names that honor a person. A taxon (e.g. species or genus; plural: taxa) named in honor of another entity is an eponym, eponymous taxon, and names specifically honoring a person or pers ... References Calymenidae Fossil taxa described in 1997 Sex Pistols Fossils of British Columbia Paleozoic life of the Northwest Territories {{phacopida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calymene
''Calymene'' Brongniart, 1822, is a genus of trilobites in the order Phacopida, suborder Calymenina, that are found throughout North America, North Africa, and Europe in primarily Silurian outcrops. ''Calymene'' is closely related to ''Flexicalymene'', and both genera are frequently found enrolled. Calymene trilobites are small, typically 2 cm in length. The cephalon is the widest part of the animal and the thorax usually has 13 segments. The correct genus authorship is Brongniart (1822). A previously published genus description in Desmarest (1816) (often mis-cited as "Calymena" Desmarest, 1817) was suppressed by ICZN Opinion 1433. Etymology ''Calymene'' - meaning ''beautiful crescent'' as a reference to the glabella. Known species and locations *†'' Calymene blumenbachii'', Dudley, England - Type *†''Calymene brevicapitata'', N. and S. Wales *†''Calymene breviceps'', Indiana and Illinois *†'' Calymene celebra'', Illinois, Indiana, and Wisconsin. *†''Calymen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calymenesum
''Calymenesum'' is a trilobite in the order Phacopida that existed in what is now China during the middle Ordovician. It was described by Kobayashi in 1951, and the type species is ''Calymenesum tingi'', originally described under the genus ''Calymene'' by Sun in 1931. The species was described from the Shistzupu Formation in Guizhou, China. P.A. Jell and J.M. Adrain. References External links ''Calymenesum'' at the |
Trilobite
Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period () and they flourished throughout the lower Paleozoic before slipping into a long decline, when, during the Devonian, all trilobite orders except the Proetida died out. The last extant trilobites finally disappeared in the mass extinction at the end of the Permian about 252 million years ago. Trilobites were among the most successful of all early animals, existing in oceans for almost 270 million years, with over 22,000 species having been described. By the time trilobites first appeared in the fossil record, they were already highly diversified and geographically dispersed. Because trilobites had wide diversity and an easily fossilized exoskeleton, they left an extensive fossil record. The stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diacalymene
''Diacalymene'' is a genus of trilobite from the order Phacopida, suborder Calymenina. It includes the species ''D. ouzregui'', ''D. clavicula'', ''D. diademata'' and ''D. gabrielsi''. It lived in the Ordovician and Silurian periods. Distribution Fossils of the genus have been found in:''Diacalymene'' at Fossilworks.org ;Ordovician * , and White Hea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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