|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Redlichiida - Olenellidae
It was reranked as Holmia (Olenellus) by Peach (1894); it was reranked as Mesonacis (Olenellus) by Peach (1894).
It was assigned to Mesonacis by Peach (1894); to Holmia by Peach (1894); to Mesonacidae by Walcott (1910); to Olenellidae by Riccio (1952) and Whittington et al. (1997); to Olenellida by Sepkoski (2002); and to Olenellinae by Palmer and Repina (1993), Lieberman (1999) and Skovsted (2006).
|Year||Name and author|
|1894||Holmia (Olenellus) Peach p. 671|
|1894||Mesonacis (Olenellus) Peach p. 671|
|1910||Olenellus Walcott p. 311|
|1952||Olenellus Riccio p. 29|
|1993||Olenellus Palmer and Repina p. 21|
|1997||Olenellus Whittington et al. p. 408|
|1999||Olenellus Lieberman p. 13|
|2002||Olenellus Sepkoski, Jr.|
|2006||Olenellus Skovsted p. 1093|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|A. R. Palmer and L. N. Repina 1993||Olenellinae with external surface generally smooth or with faint Bertillion markings, rarely granular or reticulate. Occipital ring smooth or with small node near posterior margin; occipital spine rare. Genal spine angle opposite or posterior to Ll. Genal spine slender.|