{{Short description|Genus of trilobites}} {{Automatic taxobox | fossil_range = {{fossil range|Middle Ordovician}} | image = Illaenus sarsi lateral.jpg | image_caption = ''Illaenus sarsi'' from Sweden | taxon = Illaenus | authority = Dalman, 1827 }}
'''''Illaenus''''' is a genus of trilobites from Russia and Morocco, from the middle Ordovician.
Species included in this genus can reach a length of about {{convert|57|mm}}. They are without glabella and without articulation of the tail. The cephalon has a high profile and recurved genal spines. Eyes are distant from the axis of the head, situated nearer to the edge.<ref>[https://archive.org/stream/classedannotated00vogdrich/classedannotated00vogdrich_djvu.txt Archive.org]</ref><ref>[http://www.fossilmuseum.net/Fossil_Galleries/Russian_Trilobites/IllaenusTaurkornis2/IllaenusTaurkornis2.htm Fossil Museum]</ref>
==Selected species== This genus includes about 50 species:<ref name=fa>{{fossilworks |id=19582 |title=''Illaenus'' |access-date=2 December 2015}}</ref>
*{{extinct}}''Illaenus alveatus'' Raymond 1925 *{{extinct}}''Illaenus auriculatus'' Ross Jr. & Barnes 1967 *{{extinct}}''Illaenus bayfieldi'' Billings 1859 *{{extinct}}''Illaenus bucculentus'' Whittington 1963 *{{extinct}}''Illaenus consimilis'' Billings 1865 *{{extinct}}''Illaenus consobrinus'' Billings 1865 *{{extinct}}''Illaenus crassicauda'' Wahlenberg 1826 *{{extinct}}''Illaenus fraternus'' Billings 1865 *{{extinct}}''Illaenus gelasinus'' Whittington 1965 *{{extinct}}''Illaenus lacertus'' Whittington 1954 *{{extinct}}''Illaenus marginalis'' Raymond 1925 *{{extinct}}''Illaenus oscitatus'' Fortey 1980 *{{extinct}}''Illaenus slancyensis'' Krylov 2016 *{{extinct}}''Illaenus spiculatus'' Whittington 1963 *{{extinct}}''Illaenus tauricornis'' Kutorga 1848 *{{extinct}}''Illaenus tumidifrons'' Billings 1865 *{{extinct}}''Illaenus utahensis'' Hintze 1952 *{{extinct}}''Illaenus welchi'' Loch & Ethington 2017
==See also== *Ordovician fauna of Putilovo village
==References== {{Reflist}} *Yvonne Howells, "Ordovician Trilobites of St. Petersburg Region"
==External links== {{Commons category}} *[https://web.archive.org/web/20110701155607/http://www.indiana9fossils.com/Trilobites/Russian-Trilobites.htm Russian Trilobites] *[http://www.paleoart.com/catalog/382/Illaenus Saint Petersburg Paleontological Laboratory] {{Webarchive|url=https://web.archive.org/web/20120324234932/http://www.paleoart.com/catalog/382/Illaenus |date=2012-03-24 }}
{{Taxonbar|from=Q12060685}}
Category:Corynexochida genera Category:Illaenina Category:Ordovician trilobites Category:Fossils of Morocco Category:Fossils of Russia Category:Bromide Formation Category:Paleozoic life of Ontario Category:Paleozoic life of Newfoundland and Labrador Category:Paleozoic life of the Northwest Territories Category:Paleozoic life of Nunavut Category:Paleozoic life of Quebec Category:Paleozoic life of Yukon
{{Corynexochida-stub}}