Illaenus

IllaenusTemporal range:
Illaenus tauricornis from Russia. On display at the Museo Civico di Storia Naturale di Milano
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	†Artiopoda
Class:	†Trilobita
Order:	†Corynexochida
Family:	†Illaenidae
Genus:	†IllaenusDalman, 1827

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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 57 millimetres (2.2 in). 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.

This genus includes about 50 species:

• †Illaenus alveatus Raymond 1925

• †Illaenus auriculatus Ross Jr. & Barnes 1967

• †Illaenus bayfieldi Billings 1859

• †Illaenus bucculentus Whittington 1963

• †Illaenus consimilis Billings 1865

• †Illaenus consobrinus Billings 1865

• †Illaenus crassicauda Wahlenberg 1826

• †Illaenus fraternus Billings 1865

• †Illaenus gelasinus Whittington 1965

• †Illaenus lacertus Whittington 1954

• †Illaenus marginalis Raymond 1925

• †Illaenus oscitatus Fortey 1980

• †Illaenus slancyensis Krylov 2016

• †Illaenus spiculatus Whittington 1963

• †Illaenus tauricornis Kutorga 1848

• †Illaenus tumidifrons Billings 1865

• †Illaenus utahensis Hintze 1952

• †Illaenus welchi Loch & Ethington 2017

• Ordovician fauna of Putilovo village

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• Yvonne Howells, "Ordovician Trilobites of St. Petersburg Region"

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• Russian Trilobites
• Saint Petersburg Paleontological Laboratory Archived 2012-03-24 at the Wayback Machine

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