# Thaleops
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> Source: https://en.wikipedia.org/wiki/Thaleops
> Source revision: 1295107539
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{{Short description|Extinct Trilobite arthropod from the Ordovician}}
{{Automatic taxobox
| fossil_range = {{Fossil range|Middle Ordovician|Katian}}
| image = A Thaleops sp. from Mount Horeb, Wisconsin.jpg
| image_caption = A ''Thaleops'' sp. from [Mount Horeb, Wisconsin](/source/Mount_Horeb%2C_Wisconsin)
| image2 = Thaleops.svg
| image2_caption = A line drawing of the species ''T. ovata''
| taxon = Thaleops
| authority = Conrad, 1843
| type_species = ''†Thaleops ovata''
| type_species_authority = Conrad, 1843
| subdivision_ranks = Species
| subdivision = *{{extinct}}''T. ovata'' Conrad, 1843
*†''T. arctura'' Hall, 1847
*†''T. angusticollis'' Billings, 1859
*†''T. clavifrons'' Billings, 1859
*†''T. conifrons'' Billings, 1859
*†''T. conradi'' Billings, 1859
*†''T. vindex'' Billings, 1865
*†''T. punctata'' Raymond, 1905
*†''T. latiaxiata'' Raymond & Narraway, 1908
*†''T. fieldi'' Raymond, 1925
*†''T. marginalis'' Raymond, 1925
*†''T. viator'' Raymond, 1925
*†''T. groenlandica'' Troedsson, 1928
*†''T. depressicapitata'' Bradley, 1930
*†''T. borealis'' Teichert, 1937
*†''T. baffinlandica'' Roy, 1941
*†''T. lacerta'' Whittington, 1954
*†''T. longispina'' Shaw, 1968
*†''T. raymondi'' Shaw, 1968
*†''T. inflata'' Shaw, 1968
*†''T. adunca'' Chatterton & Ludvigsen, 1976
*†''T. mackenziensis'' Chatterton & Ludvigsen, 1976
*†''T. nunavutica'' Hammann, 1992
*†''T. zoppii'' Hammann & Leone, 1997
*{{extinct}}''T. anusacerbissima'' Amati & Westrop, 2004
*{{extinct}}''T. jaanussoni'' Amati & Westrop, 2004
*{{extinct}}''T. mobydicki'' Amati & Westrop, 2004
*{{extinct}}''T. laurentiana'' Amati & Westrop, 2004
| synonyms = *{{extinct}}''[Nanillaenus](/source/Nanillaenus)''? Jaanusson, 1954[
}}
'''''Thaleops''''' is an extinct genus of [trilobite](/source/trilobite) of the family [Illaenidae](/source/Illaenidae). It lived from the [Floian](/source/Floian) to the [Katian](/source/Katian) of the [Ordovician](/source/Ordovician) in what is now [North America](/source/North_America).
''Thaleops'' can be told apart from other [illaenids](/source/Illaenidae) because of the [cheek spines](/source/Cephalon_(arthropod_head)) that many [species](/source/species) possess under their eyes. ''Thaleops'' had a large distribution range, With some species being found in parts of [Canada](/source/Canada) to some U.S states including [Oklahoma](/source/Oklahoma), [Wisconsin](/source/Wisconsin), and [New York](/source/New_York_(state)).][{{cite Q|Q104430461}}] It is thought to have lived in shallow water, as a study published in Oklahoma found that [deposits](/source/Deposition_(geology)) that contained ''Thaleops'' and the [asaphid](/source/Asaphidae) trilobite ''[Bumastides](/source/Bumastides)'' contained 4 times as many trilobite genera, where associated with shallow water areas.[{{Cite web|title=Sedimentary facies and trilobite biofacies along an Ordovician shelf to basin. gradient Viola Group South-Central. Oklahoma|url=https://dwww.researchgate.net/publication/250082995_Sedimentary_facies_and_trilobite_biofacies_along_an_Ordovician_shelf_to_basin_gradient_Viola_Group_South-Central_Oklahoma|website=Research Gate}}]
==Classification==
Classification of ''Thaleops'', ''[Illaenus](/source/Illaenus)'', and ''[Nanillaenus](/source/Nanillaenus)'' by Amati & Westrop, 2004.[
{{clade |style=font-size:85%; line-height:85%
|1=''[Raymondaspis](/source/Raymondaspis)''
|2={{clade
|1=''[I. roemeri](/source/I._roemeri)''
|2={{clade
|1={{clade
|1=''[I. fallax](/source/I._fallax)''
|2=''[I. praecurrens](/source/I._praecurrens)''}}
|2={{clade
|1=''[I. crassicauda](/source/Illaenus_crassicauda)''
|2=''[I. sarsi](/source/I._sarsi)''
|3=''[I. aduncus](/source/I._aduncus)''
|4=''[I. planifrons](/source/I._planifrons)''
|5=''[I. oscitatus](/source/I._oscitatus)''
|label6='''''Thaleops'''''
|6={{clade
|1=''[I. marginalis](/source/I._marginalis)''
|2={{clade
|1=''[I. utahensis](/source/I._utahensis)''
|2={{clade
|1={{clade
|1=''[I. lacertus](/source/I._lacertus)''
|2=''[I. viator](/source/I._viator)''}}
|2={{clade
|1={{bg|#E6FFE6|''[T. mobydicki](/source/T._mobydicki)''}}
|2={{clade
|1={{clade
|1={{clade
|1=''[I. conradi](/source/I._conradi)''
|2={{bg|#E6FFE6|''[T. laurentiana](/source/T._laurentiana)''}}}}
|2={{clade
|1=''[Nanillaenus mackenziensis](/source/Nanillaenus_mackenziensis)''
|2={{clade
|1=''[Nanillaenus aduncus](/source/Nanillaenus_aduncus)''
|2={{bg|#E6FFE6|''[T. anusacerbissima](/source/T._anusacerbissima)''}}}}}}}}
|2={{clade
|1=''[I. fieldi](/source/I._fieldi)''
|2={{clade
|1=''[I. latiaxiatus](/source/I._latiaxiatus)''
|2=''[I. depressicapitatus](/source/I._depressicapitatus)''
|3={{clade
|1={{bg|#E6FFE6|''[T. jaanussoni](/source/T._jaanussoni)''}}
|2={{clade
|1={{bg|#E6FFE6|''[T. raymondi](/source/T._raymondi)''}}
|2={{clade
|1=''[I. angusticollis](/source/I._angusticollis)''
|2={{bg|#E6FFE6|''[T. ovata](/source/T._ovata)''}}
|3={{clade
|1=''[I. conifrons](/source/I._conifrons)''
|2={{bg|#E6FFE6|''[T. longispina](/source/T._longispina)''}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
{{legend2|#E6FFE6|border=1px #aaa solid}} '''''Thaleops'''''
==References==
{{Reflist}}
{{Taxonbar|from=Q109975590}}
Category:Corynexochida genera
Category:Trilobites of North America
Category:Ordovician trilobites
Category:Illaenina
---
Adapted from the Wikipedia article [Thaleops](https://en.wikipedia.org/wiki/Thaleops) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Thaleops?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.
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