''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 . 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.
Fossil Museum
/ref>
Selected species
This genus includes about 50 species:Illaenus alveatus
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Raymond 1925
*''Illaenus auriculatus
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Ross, Jr. & Barnes 1967
*''Illaenus bayfieldi
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Billings 1859
*''Illaenus bucculentus
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Whittington 1963
*''Illaenus consimilis
''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 . They are without glabella and without articulation of the tail. The cephalon has a high ...
'' Billings 1865
*'' Illaenus consobrinus'' Billings 1865
*''Illaenus crassicauda
''Illaenus crassicauda'' is a species of trilobites belonging to the family Illaenidae. These trilobites lived in the middle Ordovician and in the Silurian age (443 - 418 million years ago). Fossils of this species have been found in the sedimen ...
'' Wahlenberg 1826
*''Illaenus fraternus
''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 . They are without glabella and without articulation of the tail. The cephalon has a high ...
'' Billings 1865
*''Illaenus gelasinus
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Whittington 1965
*''Illaenus lacertus
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Whittington 1954
*''Illaenus marginalis
''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 . They are without glabella and without articulation of the tail. The cephalon has a high ...
'' Raymond 1925
*''Illaenus oscitatus
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Fortey 1980
*''Illaenus slancyensis
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Krylov 2016
*''Illaenus spiculatus
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Whittington 1963
*''Illaenus tauricornis
''Illaenus tauricornis'' is a species of trilobites from Russia and Morocco, from the middle Ordovician
The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million year ...
'' Kutorga 1848
*''Illaenus tumidifrons
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Billings 1865
*''Illaenus utahensis
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Hintze 1952
*''Illaenus welchi
''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 . They are without glabella and without articulation of the tail. The cephalon has a high prof ...
'' Loch & Ethington 2017
See also
*Ordovician fauna of Putilovo village
The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start of the Silurian Period Mya.
...
References
*Yvonne Howells, "Ordovician Trilobites of St. Petersburg Region"
External links
Russian TrilobitesSaint Petesburg Paleontological Laboratory
Corynexochida genera
Illaenina
Ordovician trilobites
Fossils of Morocco
Fossils of Russia
Bromide Formation
Paleozoic life of Ontario
Paleozoic life of Newfoundland and Labrador
Paleozoic life of the Northwest Territories
Paleozoic life of Nunavut
Paleozoic life of Quebec
Paleozoic life of Yukon
{{Corynexochida-stub