Olenellus

Gapp, I. Wesley & Lieberman, Bruce S., 2014, New olenelloid trilobites from the Northwest Territories, Canada, Zootaxa 3866 (4), pp. 479-498 : 485

publication ID	https://doi.org/10.11646/zootaxa.3866.4.2
publication LSID	lsid:zoobank.org:pub:D06E5477-4D5C-4402-B909-09A2AAFFB556
DOI	https://doi.org/10.5281/zenodo.6136068
persistent identifier	https://treatment.plazi.org/id/DC11878B-3B4B-FFC3-B1AF-3984E6342067
treatment provided by	Plazi (2016-04-17 19:02:21, last updated 2024-11-29 11:45:32)
scientific name	Olenellus
status

Treatment

Olenellus View in CoL sp. aff. clarki ( Resser, 1928)

Fig. 3.2, 3.5

Olenellus clarki Lieberman, 1999 , p. 21, figs. 3.2, 3.5; see for complete synonymy.

Material examined. KUMIP 355556 and PWNHC-2013.23.3.

Discussion. Despite being incompletely preserved specimens, it is possible to identify similarities between these two cephala and O. clarki . These include the presence of a plectrum and preglabellar field, narrow cephalic border, anteriorly divergent lateral margins of L2, a prominent furrow on the ocular lobe, and prominently flattened extraocular area. Olenellus clarki is a biostratigraphically long ranging species in the Great Basin ( Webster 2011a) and thus it might not be surprising to find it or something very similar in the northwestern part of Laurentia.

Occurrence. Olenellus zone or Waucoban Series, Dyeran stage, sensu Webster (2011a, b) and Webster et al. (2011), early Cambrian, Sekwi Formation, Mackenzie Mountains, Northwest Territories, Canada, Section 4, 430– 720m above the base of section.

References

Lieberman, B. S. (1999) Systematic revision of the Olenelloidea (Trilobita, Cambrian). Bulletin of the Peabody Museum of Natural History, 45, 1 - 150. [Yale University]

Resser, C. E. (1928) Cambrian fossils from the Mohave Desert. Smithsonian miscellaneous collections, 81 (2), 1 - 14.

Webster, M. (2011 a) Trilobite biostratigraphy and sequence stratigraphy of the Upper Dyeran (traditional Laurentian Lower Cambrian ) in the southern Great Basin, U. S. A. In: Hollingsworth, J. S., Sundberg, F. A. & Foster, J. R. (Eds.), Cambrian Stratigraphy and Paleontology of Northern Arizona and Southern Nevada. Museum of Northern Arizona Bulletin, 67, 121 - 154.

Webster, M. (2011 b) Stops 7 A, 7 B, and 7 C, Upper Dyeran litho- and biostratigraphy of the Split Mountain area, Nevada. In: Hollingsworth, J. S., Sundberg, F. A. & Foster, J. R. (Eds.), Cambrian Stratigraphy and Paleontology of Northern Arizona and Southern Nevada. Museum of Northern Arizona Bulletin, 67, 236 - 246.