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The Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these groups are extinct or severely reduced in importance and brachiopods never quite recover. Also, the Devonian is the last time we see trilobites with such variation, large sizes and numbers and orthocerids too are much more uncommon after the rise of the goniatites. The massive tabulate coral reefs also disappear after the Devonian. Fascinating period and I hope to share some of its wonders with you. Equally, a lot of this is rather new to me, so I would be very grateful for any assistance, corrections or further information on my specimens. Thank you. The Early Devonian epoch is split into three stages, so let's start with the first of those, the Lochkovian, that began about 419 mya and finished roughly 411 mya. I have been sent a nice selection of brachiopods from the Kalkberg Formation, Helderberg Group by the Mighty @Misha, mostly. But the kind gentleperson also sent me this fascinating little bryozoan hash : It is dominated by fenestellids, which is usually the case in the Devonian, but other orders sill occur. These ones, I think, are Fenestella, but there are so many species in the formation that I wont take a guess as to species : Not sure what this one is ;
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- 7
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- cordillera cantabrica
- cryptoschisma schultzii
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(and 79 more)
Tagged with:
- cordillera cantabrica
- cryptoschisma schultzii
- erfoud
- reedops
- goniatites
- panenka
- assa
- draa
- yeraifa formation
- assie de nkhaila member
- cuninulus
- cuninulus assaensis
- ferronia subspeciosa
- ferronia
- aguion formation
- ranees group
- plicathyris ezquerrai
- plicathyris
- area de bonar
- early devonian
- lower devonian
- lochkovian
- pragian
- emsian
- bryozoa
- tabulata
- crenulipora
- morocco
- crenulipora difformis
- leptotrypella
- kalkberg
- fenestella
- fenestellid
- helderberg group
- fenestrata
- helderberg
- kalkberg formation
- new york
- schoharie
- usa
- gypidula
- pentamerid
- gypidula galeata
- pentamerida
- trepostome
- trepostomata
- thamniscus
- polypora
- polypora lilia
- discomyorthis
- atrypa
- discomyorthis oblata
- atrypa reticularis
- orthid
- orthida
- atrypida
- atrypid
- rhynchonellid
- rhynchonellida
- uncinulus
- athyrid
- uncinulus pyramidatus
- athyrida
- meristella
- concinnispirifer
- meristella laevis
- sprifer
- spiriferid
- speriferida
- costellispirifer
- costellisprifer concinnus
- bivalve
- bivalvia
- mollusca
- mollusc
- colorado quarry
- becraft
- becraft mountain
- becraft formation
- schizophoria
- schizop
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A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
- 177 replies
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- 7
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- fort steele
- marble mountains
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(and 76 more)
Tagged with:
- fort steele
- marble mountains
- mickwitzia
- chambless limestone
- mickwitzia occidens
- mid-dyeran
- yorkia zafrensis
- yorkia
- nisusia vaticini
- nisusia
- kutorginata
- kutorginate
- lancara formation
- barrios fascies
- spain
- embalse del luna
- leon
- falites fala
- falites
- phosphatocopida
- ctenopyge affinis
- phosphatocopid
- sphaerophthalmus alatus
- ctenopyge
- biwabek
- mary ellen mine
- proterozoic
- biwabek formation
- stromatolite
- collenia
- collenia undosa
- ptychopariida
- cyanobacteria
- jellyfish
- trilobite
- medusina
- south australia
- ellipsocephalus
- lower cambrian
- lingulella davisii
- lingulella
- millard county
- tremadoc
- utah
- late cambrian
- linguella davisii
- upper cambrian
- wales
- ptychagnostus gibbus
- hamatolenus morocanus
- linguella
- czechoslovakia
- ellipsocephalid
- wheeler shale
- ptychagnostus
- prague basin
- slammestadt
- agnostid
- paradoxides series
- morocco
- hamatolenus
- middle cambrian
- norway
- czech republic
- ethmocyathus
- cambrian
- jince formation
- medusinites
- archaeocyathid
- rangeomorph
- california
- holdfast
- parabolina
- ediacaran
- australia
- parabolina spinulosa
- peltura beds
- d
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Hi everyone. I recently visited a quarry at the north of Spain (more specifically a geographical area called "El Bierzo", famous for its fossils from the carboniferous era) and I found the following ones. I think I have identified most of them but I would like to know your opinion. Thank you very much!
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- fossil
- carboniferous
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I want to submit for identification the specimen below. It came from the Carboniferous of Leon, Spain, labeled as tree trunk cortex. There are no other informations available. Any thought of what might be exactly, or a more precise ID will be welcomed. Thank you.