Drahomira Rugata
''Drahomira'' is an extinct genus of paleozoic monoplacophorans in the family Tryblidiidae. Distribution Czech Republic. Genera Species in the genus ''Drahomira'' include:''Drahomira''

Paleobiology Database

. accessed 15 April 2010. * '''' * ''

Silurian
The Silurian ( ) is a geologic period and system spanning 24.6 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 shortest period of the Paleozoic Era. 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 fully terrestrialized. A significant evolutionary milestone during ...
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Jaroslav Perner
Jaroslav Perner (March 28, 1869 in Týnec nad Labem – June 9, 1947 in Prague) was a Czech paleontologist. In 1927 Perner became professor of paleontology at the Charles University in Prague. He continued in work started by Joachim Barrande (the ''Systéme silurien du center de la Bohéme''). He was also custodian of the Czech National Museum The National Museum (NM) (Czech: ''Národní muzeum'') is a Czech museum institution intended to systematically establish, prepare, and publicly exhibit natural scientific and historical collections. It was founded in 1818 by Kašpar Maria Štern ... in Prague. External links Very short biography (in Czech) 1869 births 1947 deaths Czech paleontologists {{CzechRepublic-scientist-stub ...
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Monoplacophora
Monoplacophora , meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell inhabiting deep sea environments . Extant representatives were not recognized as such until 1952; previously they were known only from the fossil record, and were thought to have become extinct 375 million years ago. Although the shell of many monoplacophorans is limpet-like in shape, they are not gastropods, nor do they have any close relation to gastropods. Definition Discussion about monoplacophorans is made difficult by the slippery definition of the taxon; some authors take it to refer to all non-gastropod mollusks with a single shell, or all single-shelled mollusks with serially repeated units; whereas other workers restrict the definition to cap-shaped forms, excluding spiral and other shapes of shell. The inclusion of the gastropod-like Bellerophontoidea within the group is also contentious. One attempt to resolve this confusion was to separate out the predom ...
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Tryblidiidae
Tryblidiidae is an extinct family of paleozoic monoplacophorans in the superfamily Tryblidioidea. Genera Genera in the family Tryblidiidae include: * ''Tryblidium'' Gustaf Lindström, Lindström, 1880. From Ordovician and Silurian.W. H. Dall, Dall W. H. 1913. ''Gastropods''. In: Charles Rochester Eastman, Eastman C. R. ''Text Book of Paleontology edited by C. R. Eastman adapted from German of K. A. von Zittel, 2nd edition revised and enlarged by the editor in collaboration with the following named specialists: R.S. Bassler, W. H. Dall, Charles Doolittle Walcott, C. D. Walcott.'Volume 1 MacMillan & Co., London. xii + 839 ppPage 521 * ''Drahomira'' Perner, 1903 ** ''Drahomira barrandei'' ** ''Drahomira glaseri'' ** ''Drahomira kriziana'' ** ''Drahomira rugata'' * ''Helcionopsis'' Ulrich & Scofield, 1897 * ''Pentalina (mollusc), Pentalina'' Horný, 1961 ** ''Pentalina prantli'' Horný, 1961 * ''Pilina'' References

Prehistoric monoplacophorans Prehistoric mollusc families ...
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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 NCEAS-funded Phanerozoic Marine Paleofaunal Database initiative, which operated from August 1998 through August 2000. From 2000 to 2015, PBDB received funding from the National Science Foundation. PBDB also received support form the Australian Research Council. From 2000 to 2010 it was housed at the National Center for Ecological Analysis and Synthesis, a cross-disciplinary research center within the University of California, Santa Barbara. It is currently housed at University of Wisconsin-Madison and overseen by an international committee of major data contributors. The Paleobiology Database works closely with the Neotoma Paleoecology Database, which has a similar intellectual history, but has focused on the Quaternary (with an emphasis on the late Pleistocene and Holocen ...
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Drahomira Barrandei
''Drahomira'' is an extinct genus of paleozoic monoplacophorans in the family Tryblidiidae. Distribution Czech Republic. Genera Species in the genus ''Drahomira'' include:''Drahomira''

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 NCEAS-funded Phanerozoic Marine Pale ...

. accessed 15 April 2010. * '' Drahomira barrandei'' * ''
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Drahomira Glaseri
''Drahomira'' is an extinct genus of paleozoic monoplacophorans in the family Tryblidiidae. Distribution Czech Republic. Genera Species in the genus ''Drahomira'' include:''Drahomira''

Paleobiology Database

. accessed 15 April 2010. * ''

Drahomira Kriziana
''Drahomira'' is an extinct genus of paleozoic monoplacophorans in the family Tryblidiidae. Distribution Czech Republic. Genera Species in the genus ''Drahomira'' include:''Drahomira''

Paleobiology Database

. accessed 15 April 2010. * '''' * '''' * '' Drahomira krizian ...
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Drahomira Rugata
''Drahomira'' is an extinct genus of paleozoic monoplacophorans in the family Tryblidiidae. Distribution Czech Republic. Genera Species in the genus ''Drahomira'' include:''Drahomira''

Paleobiology Database

. accessed 15 April 2010. * '''' * ''

Prehistoric Monoplacophorans
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 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 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Age. T ...
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