Callavia
{{Italic title}}
{{Taxobox
| image = Nevadella perfecta USNM PAL 60081.jpg
| image_caption = Callavia
| fossil_range = {{fossil range|Atdabanian}}
| regnum = Animalia
| phylum = Arthropoda
| classis = Trilobita
| ordo = Redlichiida
| subordo = Olenellina
| superfamilia = Judomioidea{{cite journal|last1=Lieberman |first1=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 }}{{cite journal|last= Lieberman|first= B.S.|year= 2001|title= Phylogenetic analysis of the Olenellina Walcott, 1890 (Trilobita, Cambrian)|journal= Journal of Paleontology|volume= 75|number= 1|pages= 96–115|url= http://www.bioone.org/doi/full/10.1666/0022-3360%282001%29075%3C0096%APAOTOW%3E2.0.CO%3B2|doi=10.1666/0022-3360(2001)075<0096:PAOTOW>2.0.CO;2|url-access= subscription}}
| familia =
| genus = Callavia
| genus_authority = Matthew, 1897
| species = C. broegeri
| binomial = Callavia broegeri
| binomial_authority = (Walcott, 1890)
| synonyms =
- Callavia crosbyi
- Nevadia crosbyi
- Olenellus (Holmia) broegeri
- Olenellus (Mesonacis) broegeri
}}
Callavia is an extinct, monotypic genus of trilobite arthropods. C. broegeri lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period{{cite journal|last=Sepkoski |first=Jack |authorlink=Jack Sepkoski |title=A compendium of fossil marine animal genera (Trilobita entry) |journal=Bulletins of American Paleontology |volume=363 |pages=1–560 |year=2002 |url=http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=307&rank=class |accessdate=2008-01-12 |url-status=dead |archiveurl=https://web.archive.org/web/20060905162524/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=307&rank=class |archivedate=2006-09-05 }} in what are today Canada and the United States.
Taxonomy
The position of Callavia in relation to other Olenellina has shifted repeatedly over time. Initially it was assigned to the Holmiinae by Pierre Hupé, and was later moved back and forth to the Callaviinae.{{citation|last1=Palmer|first1=A.R.|last2=Repina|first2=L.N.|year=1993|title=Through a Glass Darkly: Taxonomy, Phylogeny and Biostratigraphy of the Olenellina|journal=The University of Kansas Paleontological Contributions|volume=3|pages=1–35|url=http://kuscholarworks.ku.edu/dspace/handle/1808/3760}} Lieberman, however, argues Callavia is a basal member of the Judomioidea.
= Reassigned species =
- C. brevioculata = Nevadella cartlandi
- C. burri = Pleisionevadella burri
- C. callavei = Callavalonia callavei
- C. cartlandi = Nevadella cartlandi
- C. cobboldi = Nevadella cartlandi
- C. eucharis = Nevadella eucharis
- C. hastata = Callavalonia callavei
- C. lotzei = Sdzuyomia lotzei
- C. perfecta = Nevadella perfecta
Distribution
C. broegeri is known from the Lower Cambrian of Newfoundland (Brigus Formation, Branchian Series, Conception Bay), Nova Scotia (between Docters Brook and Malignant Brook, northernmost Antigonish Highlands), Canada, and Massachusetts, USA (Weymouth Formation, Pearl street, North Weymouth, Mill Cove, Norfolk County).
Ecology
C. broegeri occurs together with lampshells Sunnaginia imbricata and Eccentrotheca kanesia, and
the agnostid Serrodiscus bellimarginatus.{{Cite journal|last= Landing|first= E.|year= 1995|title= Upper Placentian-Branchian series of mainland Nova Scotia (middle-upper Lower Cambrian) faunas, paleoenvironments, and stratigraphic revision|journal= Journal of Paleontology|volume= 69|number= 3|pages= 475–495|jstor= 1306322|doi= 10.1017/S0022336000034879|bibcode= 1995JPal...69..475L|s2cid= 133094242}}[https://paleobiodb.org/classic/displayCollResults?collection_no=9350 Paleobiology Database]
See also
References
{{Reflist|30em}}
{{Taxonbar|from=Q26183}}
Category:Fossils of the United States
Category:Monotypic trilobite genera
Category:Paleontology in Newfoundland and Labrador