Illaenus Explained
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.[1] [2]
Selected species
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
See also
- Ordovician fauna of Putilovo village
References
- Yvonne Howells, "Ordovician Trilobites of St. Petersburg Region"
External links
Notes and References
- https://archive.org/stream/classedannotated00vogdrich/classedannotated00vogdrich_djvu.txt Archive.org
- http://www.fossilmuseum.net/Fossil_Galleries/Russian_Trilobites/IllaenusTaurkornis2/IllaenusTaurkornis2.htm Fossil Museum