Olenellus

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Olenellus thompsoni (Hall), 1859

Kingdom ANIMALIA
Subkingdom METAZOA
Branch EUMETAZOA
Subbranch BILATERIA
Grade EUCOELOMATA
Subgrade SCHIZOCOELA

Phylum ARTHROPODA Siebold & Stannuis, 1845
Supersubphylum EUARTHROPODA Lankester, 1904
Subphylum TRILOBITAMORPHA StØrmer, 1944
Class TRILOBITA Walsch 1771
Order REDLICHIIDA Richter, 1933
Suborder OLENELLINA Resser, 1938
Family OLENELLIDAE Vogdes, 1893
Subfamily OLENELLINAE Vogdes, 1893

Olenellus Billings 1861 [pro Barrandia Hall1860 (non M'Coy, 1849)] [*Olenus thompsoni Hall, 1859; SD Walcott, 1896] [=Mesonacis WALCOT, 1885]. Glabella long, with rounded frontal lobe, usually reaching anterior border furrow; palpebral lobes mostly long, terminating opposite occipital furrow or further back. Hypostoma without stalk. L. Cambrian, N. America - Greenland - Scotland.

Classifications from:

Invertebrate Fossils, Moore, Lalicker and Fischer, McGraw Hill, New York, 1952.
Treatise on Invertebrate Paleontology, Part O, Arthropoda 1, Moore (ed.), Geologic Society of America and University of Kansas Press, 1959.

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