Monograptus is a genus of graptolites in the order Graptoloidea. This particular genus is the last stage of the graptoloid evolution before its extinction in the early Devonian. A characteristic of the genus includes one uniserial stipes with very elaborate thecae. This particular genus contains large number of graptolite species and may not be monophyletic.
The International Commission on Stratigraphy (ICS) has assigned the First Appearance Datum (FAD) of Monograptus uniformis as the defining biological marker for the start of the Lochkovian, 419.2 ± 3.2 million years ago, the earliest stage of the Devonian.[1] ICS has assigned the FAD of Monograptus parultimus defining biological marker for the start of the Pridoli epoch, 423.0 ± 2.3 million years ago, of Monograptus turriculatus (together with the replacement of the brachiopod Eocoelia intermedia with E. curtisi) for the start of the Telychian, 438.5 ± 1.1 million years ago, and of Monograptus austerus sequens for the start of the Aeronian, 440.8 ± 1.2 million years ago, all stages of the Silurian.
Referencesedit
^Gradstein, F. M. et al. ICS on Stage, page 5. Retrieved 2015-06-16.
External linksedit
Photo; english.fossiel.net—"graptolite Monograptus from Bornholm, Denmark"
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monograptus, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, january, 2017,. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Monograptus news newspapers books scholar JSTOR January 2017 Learn how and when to remove this template message Monograptus is a genus of graptolites in the order Graptoloidea This particular genus is the last stage of the graptoloid evolution before its extinction in the early Devonian A characteristic of the genus includes one uniserial stipes with very elaborate thecae This particular genus contains large number of graptolite species and may not be monophyletic MonograptusTemporal range Silurian Early Devonian PreꞒ Ꞓ O S D C P T J K Pg N Monograptus spiralis Scientific classification Kingdom Animalia Phylum Hemichordata Class Graptolithina Order Graptoloidea Family Monograptidae Genus MonograptusGeinitz 1852Biostratigraphic significance editThe International Commission on Stratigraphy ICS has assigned the First Appearance Datum FAD of Monograptus uniformis as the defining biological marker for the start of the Lochkovian 419 2 3 2 million years ago the earliest stage of the Devonian 1 ICS has assigned the FAD of Monograptus parultimus defining biological marker for the start of the Pridoli epoch 423 0 2 3 million years ago of Monograptus turriculatus together with the replacement of the brachiopod Eocoelia intermedia with E curtisi for the start of the Telychian 438 5 1 1 million years ago and of Monograptus austerus sequens for the start of the Aeronian 440 8 1 2 million years ago all stages of the Silurian References edit Gradstein F M et al ICS on Stage page 5 Retrieved 2015 06 16 External links editPhoto Article english fossiel net graptolite Monograptus from Bornholm Denmark nbsp This article related to a Devonian animal is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Monograptus amp oldid 1193895875, wikipedia, wiki, book, books, library,
