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Pentagnostus - Revision history
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Caftaric: Category:Trilobites of Australia
2016-05-14T08:11:06Z
<p>Category:Trilobites of Australia</p>
<p><b>New page</b></p><div>{{Taxobox<br />
| fossil_range = {{fossilrange|Middle Cambrian}}<br />
| image = Pentagnostus brighamensis sharper only.jpg<br />
| image_caption = ''Pentagnostus brighamensis'', 6mm, Spence Formation <br />
| regnum = [[Animal]]ia<br />
| phylum = [[Arthropod]]a<br />
| classis = [[trilobite|Trilobita]]<br />
| ordo = [[Agnostida]]<br />
| subordo = [[Agnostina]]<br />
| superfamilia = [[Agnostoidea]]<br />
| familia = [[Peronopsidae]]<br />
| genus = '''''Pentagnostus'''''<br />
| genus_authority = Lermontova, 1940<br />
| subdivision_ranks = [[Subgenus|subgenera]]<br />
| subdivision = <br />
* ''Pentagnostus (Pentagnostus)''<br />
* ''Pentagnostus (Meragnostus)'' <small>Naimark, 2012</small><br />
and [[#Species and distribution|see text]] for species<br />
<ref name='Naimark'>{{cite journal|last= Naimark|first= E.B.|year= 2012|title= Hundred species of the Genus ''Peronopsis'' Hawle et Corda, 1847|journal= Paleontological Journal|volume= 46|issue= 9|pages= 945–1057|doi= 10.1134/S0031030112090018}}</ref><br />
}}<br />
'''''Pentagnostus''''' is a [[genus]] of [[trilobite]]s restricted to the [[Middle Cambrian]]. Its remains have been found in Siberia, Australia, North America, [[Scandinavia]], and [[Kazakhstan]].<ref name='Naimark'/><br />
<br />
== Taxonomy ==<br />
[[File:Gradogram Pentagnostus.jpg|left|450px|thumb|Schematic showing the relationship between both subgenera of ''Pentagnostus'' (light green), the ancestral ''Archaeagnostus'' (darker green) and the descending Ptychagnostidae (red). Based on E. B. Naimark (2012). Hundred species of the genus ''Peronopsis'' Hawle et Corda, 1847. Paleontological Journal 46(9):945-1057]]<br />
The probable ancestor of ''Pentagnostus'' is [[Archaeagnostus]]. Two subgenera can be distinguished. The nominate subgenus occurred first and developed into the later subgenus ''Pentagnostus (Meragnostus)'' and the family [[Ptychagnostidae]].<ref name='Naimark'/><br />
<br />
== Species and distribution ==<br />
<br />
=== Subgenus ''Pentagnostus (Pentagnostus)'' ===<br />
* ''P. anabarensis'' <small>Lermontova, 1940 ([[Type (biology)|type]])</small><br />
* ''P. ademptus'' <small>(Prokovskaya and Jegorova, 1972)</small><br />
* ''P. brighamensis'' <small>(Resser, 1938)</small><br />
* ''P. shergouldi'' <small>Laurie, 2004</small><br />
* ''P. veles'' <small>Öpik, 1979</small> synonym ''P. endemicus''.<ref name='Naimark'/><br />
<br />
=== Subgenus ''Pentagnostus (Meragnostus)'' ===<br />
* ''P. bonnerensis'' <small>(Resser, 1939) ([[Type (biology)|type]])</small> synonyms ''P. admirabilis'' and ''Agnostus lautus''.<br />
* ''P. bulkurensis'' <small>(Prokovskaya and Pregel, 1982)</small><br />
* ''P. remotus'' <small>(Prokovskaya and Jegorova, 1969)</small><br />
* ''P. segmentus'' <small>(Robison, 1964)</small><br />
* ''P. shabactensis'' <small>Ergaliev, 2008</small> synonym ''Peronopsis ultima'' <small>Ergaliev, 1980 non Poulsen 1960</small>.<ref name='Naimark'/><br />
<br />
== References ==<br />
{{Reflist}}<br />
<br />
[[Category:Agnostida]]<br />
[[Category:Trilobite genera]]<br />
[[Category:Cambrian trilobites]]<br />
[[Category:Cambrian trilobites of Australia]]<br />
[[Category:Fossils of Kazakhstan]]<br />
[[Category:Fossils of Russia]]</div>
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