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Trilobita - Redlichiida - Olenellidae
It was reranked as Olenellus (Paedeumias) by Palmer and Repina (1993) and Palmer (1998); it was synonymized subjectively with Olenellus by Lieberman (1999); it was misspelled as Paedumias by Sepkoski (2002) and Jell and Adrain (2003).
It was assigned to Mesonacidae by Walcott (1910) and Resser (1928); to Olenellus by Palmer and Repina (1993) and Palmer (1998); to Olenellida by Sepkoski (2002); and to Olenellidae by Riccio (1952) and Jell and Adrain (2003).
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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||Species of Olenellus with posterior margin of cephalon nearly straight or only slightly angled forward distal to position of intergenal spines. Intergenal spine or swelling generally closer to genal spine than to axial fur- row. Sagittal length of preglabellar field characteristically greater than twice sagittal length of anterior border. Posterior tips of palpebral lobes convergent toward glabella, opposite or posterior to posterior part of Li.|