{{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 | 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'' <small>Conrad, 1843</small> *†''T. arctura'' <small>Hall, 1847</small> *†''T. angusticollis'' <small>Billings, 1859</small> *†''T. clavifrons'' <small>Billings, 1859</small> *†''T. conifrons'' <small>Billings, 1859</small> *†''T. conradi'' <small>Billings, 1859</small> *†''T. vindex'' <small>Billings, 1865</small> *†''T. punctata'' <small>Raymond, 1905</small> *†''T. latiaxiata'' <small>Raymond & Narraway, 1908</small> *†''T. fieldi'' <small>Raymond, 1925</small> *†''T. marginalis'' <small>Raymond, 1925</small> *†''T. viator'' <small>Raymond, 1925</small> *†''T. groenlandica'' <small>Troedsson, 1928</small> *†''T. depressicapitata'' <small>Bradley, 1930</small> *†''T. borealis'' <small>Teichert, 1937</small> *†''T. baffinlandica'' <small>Roy, 1941</small> *†''T. lacerta'' <small>Whittington, 1954</small> *†''T. longispina'' <small>Shaw, 1968</small> *†''T. raymondi'' <small>Shaw, 1968</small> *†''T. inflata'' <small>Shaw, 1968</small> *†''T. adunca'' <small>Chatterton & Ludvigsen, 1976</small> *†''T. mackenziensis'' <small>Chatterton & Ludvigsen, 1976</small> *†''T. nunavutica'' <small>Hammann, 1992</small> *†''T. zoppii'' <small>Hammann & Leone, 1997</small> *{{extinct}}''T. anusacerbissima'' <small>Amati & Westrop, 2004</small> *{{extinct}}''T. jaanussoni'' <small>Amati & Westrop, 2004</small> *{{extinct}}''T. mobydicki'' <small>Amati & Westrop, 2004</small> *{{extinct}}''T. laurentiana'' <small>Amati & Westrop, 2004</small> | synonyms = *{{extinct}}''Nanillaenus''? <small>Jaanusson, 1954</small><ref name=amati04/> }}
'''''Thaleops''''' is an extinct genus of trilobite of the family Illaenidae. It lived from the Floian to the Katian of the Ordovician in what is now North America. ''Thaleops'' can be told apart from other illaenids because of the cheek spines that many species possess under their eyes. ''Thaleops'' had a large distribution range, With some species being found in parts of Canada to some U.S states including Oklahoma, Wisconsin, and New York.<ref name=amati04>{{cite Q|Q104430461}}</ref> It is thought to have lived in shallow water, as a study published in Oklahoma found that deposits that contained ''Thaleops'' and the asaphid trilobite ''Bumastides'' contained 4 times as many trilobite genera, where associated with shallow water areas.<ref>{{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}}</ref>
==Classification==
Classification of ''Thaleops'', ''Illaenus'', and ''Nanillaenus'' by Amati & Westrop, 2004.<ref name=amati04/>
{{clade |style=font-size:85%; line-height:85% |1=''Raymondaspis'' |2={{clade |1=''I. roemeri'' |2={{clade |1={{clade |1=''I. fallax'' |2=''I. praecurrens''}} |2={{clade |1=''I. crassicauda'' |2=''I. sarsi'' |3=''I. aduncus'' |4=''I. planifrons'' |5=''I. oscitatus'' |label6='''''Thaleops''''' |6={{clade |1=''I. marginalis'' |2={{clade |1=''I. utahensis'' |2={{clade |1={{clade |1=''I. lacertus'' |2=''I. viator''}} |2={{clade |1={{bg|#E6FFE6|''T. mobydicki''}} |2={{clade |1={{clade |1={{clade |1=''I. conradi'' |2={{bg|#E6FFE6|''T. laurentiana''}}}} |2={{clade |1=''Nanillaenus mackenziensis'' |2={{clade |1=''Nanillaenus aduncus'' |2={{bg|#E6FFE6|''T. anusacerbissima''}}}}}}}} |2={{clade |1=''I. fieldi'' |2={{clade |1=''I. latiaxiatus'' |2=''I. depressicapitatus'' |3={{clade |1={{bg|#E6FFE6|''T. jaanussoni''}} |2={{clade |1={{bg|#E6FFE6|''T. raymondi''}} |2={{clade |1=''I. angusticollis'' |2={{bg|#E6FFE6|''T. ovata''}} |3={{clade |1=''I. conifrons'' |2={{bg|#E6FFE6|''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