Olenellus gilberti, from Western Trilobites.

Belongs within: Trilobita.

Olenellus is a genus of trilobites known from the Lower Cambrian (Harrington et al. 1959).

Characters (from Harrington et al. 1959): 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.

<==Olenellus Hall 1861 [Olenellidae]W77
    |--O. armatusP98
    |--O. asaphoidesT10
    |--O. fremontiP98
    |--O. getzi Dunbar 1925TRM20
    |--O. gilberti Meek 1874RC93
    |--O. hamoculusP98
    |--O. howelli Meek in White 1874W77
    |--O. intermediusP98
    |--O. kjerulfiT10
    |--O. lapworthiP98
    |--O. mickwitziiT10
    |--O. pritchardiT10
    |--O. reticulatusP98
    |--O. robsonensisWB85
    |--O. thomsoniT10
    |--O. truemani Walcott 1913RC93
    |--O. vermontanaW77
    `--O. zoppiiT10

*Type species of generic name indicated


Harrington, H. J., G. Henningsmoen, B. F. Howell, V. Jaanusson, C. Lochman-Balk, R. C. Moore, C. Poulsen, F. Rasetti, E. Richter, R. Richter, H. Schmidt, K. Sdzuy, W. Struve, C. J. Stubblefield, R. Tripp, J. M. Weller & H. B. Whittington. 1959. Trilobita. In: R. C. Moore (ed.) Treatise on Invertebrate Paleontology pt O. Arthropoda 1 pp. O38–O540. Geological Society of America and University of Kansas Press.

[P98] Prothero, D. R. 1998. Bringing Fossils to Life: An introduction to paleobiology. WCB McGraw-Hill: Boston.

[RC93] Romano, M., W. T. Chang, W. T. Dean, G. D. Edgecombe, R. A. Fortey, D. J. Holloway, P. D. Lane, A. W. Owen, R. M. Owens, A. R. Palmer, A. W. A. Rushton, J. H. Shergold, D. J. Siveter & M. A. Whyte. 1993. Arthropoda (Trilobita). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 279–296. Chapman & Hall: London.

[T10] Taylor, T. G. 1910. The Archaeocyathinae from the Cambrian of South Australia with an account of the morphology and affinities of the whole class. Memoirs of the Royal Society of South Australia 2 (2): 55–188.

[TRM20] Thomas, R. D. K., B. Runnegar & K. Matt. 2020. Pelagiella exigua, an early Cambrian stem gastropod with chaetae: lophotrochozoan heritage and conchiferan novelty. Palaeontology 63 (4): 601–627.

[W77] White, C. A. 1877. Report upon the invertebrate fossils collected in portions of Nevada, Utah, Colorado, New Mexico, and Arizona, by parties of the expeditions of 1871, 1872, 1873, and 1874. U.S. Geographical Surveys West of the One Hundredth Meridian 4 (1): 1–219, pls 1–21.

[WB85] Whittington, H. B., & D. E. G. Briggs. 1985. The largest Cambrian animal, Anomalocaris, Burgess Shale, British Columbia. Philosophical Transactions of the Royal Society of London 309: 569–609.

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