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Plantdrew: taxobox cleanup

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taxobox cleanup

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{{italic title}}
{{Taxobox
| fossil_range = {{Geological range|506|499|late Middle Cambrian}}
| image = Toragnostus bituberculatus draw.png
| image_upright = 0.5
| image_caption = ''Toragnostus bituberculatus'' from specimen from Andrarum, Skåne, Sweden
| regnum = [[Animal]]ia
| phylum = [[Arthropod]]a
| classis = [[Trilobita]]
| ordo = [[Agnostida]]
| subordo = [[Agnostina]]
| superfamilia = [[Agnostoidea]]
| familia = [[incertae sedis]]
| genus = '''''Toragnostus'''''
| genus_authority = Robison, 1988
| subdivision_ranks = Species
| subdivision =
* ''T. bituberculatus '' <small>(Angelin, 1851)</small> synonyms ''Agnostus bituberculatus'', ''Phalagnostus bituberculatus'', ''Phoidagnostus bituberculatus''<ref name='Palmer'>{{cite book|last= [[Allison R. Palmer|Palmer]]|first= A.R.|year= 1967|title= Trilobites of East-Cental Alaska|journal= Geological Survey Professional Paper|issue= 559-B|url= https://books.google.com/books?id=rE7wAAAAMAAJ&pg=SL2-PA32 |accessdate= 22 May 2013}}</ref>
* ''T. placidus'' <small>Buchholz, 1997 (tentatively assigned)</small>
}}

'''''Toragnostus''''' is a [[genus]] of [[trilobites]] restricted to the late Middle [[Cambrian]]. Its remains have been found in the United States, Greenland, Denmark, China, Sweden, the Russian Federation, and Kazakhstan. Its headshield and tailshield are almost completely effaced and it has two thorax segments.

== Distribution ==
* ''T. bituberculatus'' occurs in the late Middle Cambrian of the United States (Hillard Peak area, Alaska)<ref name='Palmer'/> Greenland (''Lejopyge laevigata''-zone, Holm Dal Formation, West Peary-land), Denmark, China (Hunan), Sweden (''Jincella brachymetopa''-zone, [[:sv:Andrarum|Andrarum]], Skåne), the Russian Federation (''C. oriens'' and ''A. henrici''-zones, Siberian Platform, and [[Bennett Island]]), and Kazakhstan ([[Mayan stage|Mayan]], [[Tian Shan]] Range).<ref name='Treatise'>[[Harry B. Whittington|Whittington]], H. B. et al. Part O, Treatise on Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997</ref>

== Description ==
Like all Agnostida, ''Toragnostus'' is diminutive, with the headshield (or [[Cephalon (arthropod head)#Trilobites|cephalon]]) and tailshield (or [[pygidium]]) of approximately the same size (or [[Pygidium#Trilobites|isopygous]]) and outline. Like all Agnostina, ''Toragnostus'' has only two thorax segments. The cephalon and pygidium are almost completely effaced, lacking a cephalic border and with wide pygidial border. The cephalon is strongly convex. The central raised area of the cephalon (or glabella) is outlined at the rear, narrow and tapering forward. It carries an elongated median node, clearly in the front half of the cephalon. The pygidial axis (or rhachis) is very broad, with the frontal lobe (M1) defined by a furrow crossing the axis. There is a weak elongated node on the rhachis.<ref name='Robison'>{{cite journal|last= Robison|first= R.A.|year= 1988|title= Stratigraphy and Palaentology of the Holm Dal Formation (late Middle Cambrian), Central North Greenland|journal= Meddelser om Gronland, Geoscience|issue= 20|url= https://books.google.com/books?id=9GihNpPF8fgC&pg=PA53 | accessdate=22 May 2013}}</ref>

== References ==
{{Reflist}}

[[Category:Agnostida]]
[[Category:Cambrian trilobites]]
[[Category:Fossils of the United States]]
[[Category:Fossils of Greenland]]
[[Category:Fossils of Denmark]]
[[Category:Fossils of China]]
[[Category:Fossils of Sweden]]
[[Category:Fossils of Russia]]
[[Category:Fossils of Kazakhstan]]

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