{{Taxobox | fossil_range = late Lower Cambrian (Lower ''Olenellus-zone'') {{Geological range|524|518.5}} | image = Fritzolenellus truemani USNM PAL 60084.jpg | image_caption = ''Fritzolenellus truemani'', North-East base of Mumm Peak above Mural Glacier, Alberta, Canada | regnum = Animalia | phylum = Arthropoda | classis = Trilobita | ordo = Redlichiida | subordo = Olenellina | superfamilia = Olenelloidea | familia = Laudoniidae | subfamilia = Laudoniinae | genus = '''''Fritzolenellus'''''<ref name='Lieberman 1998'>{{cite journal|last=Lieberman |first=B.S. |year=1998 |title=Cladistic Analysis of the Early Cambrian Olenelloid Trilobites |journal=Journal of Paleontology |volume=72 |issue=1 |pages=59–78 |doi=10.1017/S0022336000024021 |bibcode=1998JPal...72...59L |s2cid=86307339 |url=http://invitestock.free.fr/Cambrien/pdf/Spanish%20fauna/Cladistic%20Analysis%20of%20the%20Early%20Cambrian%20Olenelloid%20Trilobites.pdf }}{{dead link|date=January 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> | genus_authority = Lieberman, 1998 | subdivision_ranks = Species | subdivision = * ''F. truemani'' <small>(Walcott, 1913)</small>, (type), synonym ''Olenellus truemani''<ref name='Lieberman 1998'/><ref name='Lieberman 1999'/> * ''F. lapworthi'' <small>(Peach & Horne, 1892)</small>, synonym ''Olenellus lapworthi''<ref name='Lieberman 1999'>{{cite journal|last1=Lieberman|first1=B.S.|year=1999|title=Systematic Revision of the Olenelloidea (Trilobita, Cambrian)|journal=Bulletin of the Peabody Museum of Natural History|volume=45|url=http://palaeontology.palass-pubs.org/pdf/Vol%2021/Pages%20615-634.pdf|access-date=2012-07-04|archive-date=2012-05-26|archive-url=https://web.archive.org/web/20120526170847/http://palaeontology.palass-pubs.org/pdf/Vol%2021/Pages%20615-634.pdf|url-status=usurped}}</ref><ref name='Cowie&McNamara'>{{cite journal|last1=Cowie|first1=J.|last2=McNamara|first2=K.J.|year=1978|title=''Olenellus'' (Trilobita) from the Lower Cambrian Strata of North-West Scotland|journal=Palaeontology|volume=21|issue=3|pages=615–634|url=http://palaeontology.palass-pubs.org/pdf/Vol%2021/Pages%20615-634.pdf|access-date=2012-07-04|archive-date=2012-05-26|archive-url=https://web.archive.org/web/20120526170847/http://palaeontology.palass-pubs.org/pdf/Vol%2021/Pages%20615-634.pdf|url-status=usurped}}</ref> * ''F. reticulatus'' <small>(Peach, 1894)</small>, synonym ''Olenellus reticulatus''<ref name='Lieberman 1999'/><ref name='Cowie&McNamara'/> }}
'''''Fritzolenellus''''' is an extinct genus from a well-known class of fossil marine arthropods, the trilobites, with three known species.<ref name='Lieberman 1999'/> It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period. ''Fritzolenellus'' occurred in parts of the paleocontinent Laurentia in what are now Northwestern Canada, Northwestern Scotland, and North-Greenland. left|thumb|Headshield of ''Fritzolenellus truemani''. Cephalon with outer test of cheeks exfoliated so as to show casts of radial canals. U.S. National Museum, Catalogue No. 60087
== Taxonomy == ''Fritzolenellus'' is the genus closest to the common ancestor of ''Mummaspis'', ''Laudonia'', the Biceratopsinae and the Bristoliinae. This clade is the sister group ''Wanneria walcottana'' and of the Holmiidae.
== Etymology == The generic name is a combination of the genus ''Olenellus'', to which these species were originally assigned,<ref name='Peach&Horne'>{{citation|last1=Peach|first1=B.N.|last2=Horne|first2=J.|year=1892|title=The ''Olenellus''-zone in the North-West Highlands of Scotland|journal=Quarterly Journal of the Geological Society of London|volume=48|issue=1–4|pages=227–242|doi=10.1144/gsl.jgs.1892.048.01-04.17|s2cid=140197589|url=https://zenodo.org/record/1448535}}</ref><ref name="Peach1894">{{cite journal |last1=Peach |first1=B.N. |title=Additions to the Fauna of the Olenellus-zone of the Northwest Highlands |journal=Quarterly Journal of the Geological Society |date=1894 |volume=50 |issue=1–4 |pages=661–676 |doi=10.1144/GSL.JGS.1894.050.01-04.44 |s2cid=140724079 |url=https://archive.org/details/peach-1894-quarterlyjourna-501894geol}}</ref> and a reference to William Henry Fritz (1928-2009), a paleontologist who worked on olenelloid trilobites. The species names have the following derivation. *''lapworthi'' is named in honor of Charles Lapworth, an English geologist who pioneered faunal analysis using index fossils and who defined the Ordovician. *''reticulatus'' (Latin) refers to the coarsely netted exoskeleton.
== Distribution == * ''F. truemani'' was collected in the Lower Cambrian (lower ''Olenellus''-zone<!--- As ''F. truemani'' co-occurs here with ''Nevadia'' and ''Nevadella'', this assignment may not be correct, and would perhaps better be assigned to the ''Nevadella''-zone --->) of Alberta, Canada (Mural Formation, in the talus slope immediately west of Mumm Peak, from the middle Mural Formation, 125 m above the base of that formation, just north of the Mount Robson Provincial Park boundary). It is also known from North-Greenland (Henson Gletscher Formation).<ref>{{cite journal|last1=Geyer|first1=G.|last2=Peel|first2=J.S.|year=2011|title= The Henson Gletscher Formation, North-Greenland, and its bearing on the global Cambrian Series 2-Series 3 boundary|journal=Bulletin of Geosciences|volume=86|issue=3|pages=465–534|url=http://www.geology.cz/bulletin/fulltext/1252_Geyer.pdf|doi=10.3140/bull.geosci.1252|doi-access=free}}</ref> * ''F. lapworthi'' occurs in the Lower Cambrian (lower ''Olenellus''-zone) of Scotland (Allt nan Righrion,<ref name='Peach&Horne'/> Meall a ‘Ghiubhais, Loch Awe),<ref name='Cowie&McNamara'/> and from the middle Dryeran of Northeastern Greenland (Upper Bastion Formation at Albert Heim Bjerge).<ref>{{cite journal|last=Stein|first=M.|year=2008|title=''Fritzolenellus lapworthi'' (Peache and Horne, 1892) from the lower Cambrian (Cambrian Series 2) Bastion Formation of North-East Greenland|journal=Bulletin of the Geological Society of Denmark|volume=56|pages=1–10|doi=10.37570/bgsd-2008-56-01|url=https://2dgf.dk/xpdf/bull56-1-10.pdf}}</ref> * ''F. reticulatus'' is found in the Lower Cambrian (Lower ''Olenellus''-zone) of Scotland (Meall a ‘Ghiubhais,<ref name='Peach&Horne'/> Allt nan Righrion, Loch Awe).<ref name='Cowie&McNamara'/><ref name='Lieberman 1999'/> left|thumb|''Fritzolenellus truemani''. A small, almost entire dorsal shield. U.S. National Museum, Catalogue No. 60089.
==References== {{Reflist}}
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Category:Cambrian trilobites Category:Fossils of Canada Category:Fossils of Great Britain Category:Fossils of Greenland Category:Paleontology in Alberta Category:Olenelloidea Category:Redlichiida genera