Illaenus

Illaenus
Temporal range:
Illaenus tauricornis from Russia. On display at the Museo Civico di Storia Naturale di Milano
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Clade: †Artiopoda
Class: †Trilobita
Order: †Corynexochida
Family: †Illaenidae
Genus: †
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 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.[1][2]

Selected species

This genus includes about 50 species:[3]

  • †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

  1. ^ Archive.org
  2. ^ Fossil Museum
  3. ^ "Illaenus". Paleobiology Database. Retrieved 2 December 2015.
  • Yvonne Howells, "Ordovician Trilobites of St. Petersburg Region"
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