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Agnostus ✝

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Description

Agnostus is a genus of agnostid trilobites that lived during the upper Middle Cambrian–lower Upper Cambrian (about 506 to 492 million years ago). It is the type genus of the family Agnostidae. It is subdivided into two subgenera, Agnostus and Homagnostus.

From Wikipedia article at https://en.wikipedia.org/wiki/Agnostus, which is released under the Creative Commons Attribution-Share-Alike License 3.0.

Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	7438407	https://www.gbif.org/species/7438407
PaleoBioDB ID (PBDB)	19176	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=19176

Rank

genus

Taxonomy (GBIF,PBDB)

Life : Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae : Agnostus

Taxonomic Status (GBIF)

accepted

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Bilateria
-	Eubilateria	Ax 1987
-	Protostomia	Grobben 1908
-	Ecdysozoa
-	Panarthropoda
phylum	Arthropoda	Latreille 1829
subphylum	Mandibulata
class	Trilobita	Walch 1771
order	Agnostida	Salter 1864
family	Agnostidae	M'Coy 1849
genus	Agnostus	Brongniart 1822

Scientific Name

Agnostus Brongniart, 1822

Name Published In

in Brongniart & Desmarest, H. N. Crust. Foss.

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Agnostus	genus	belongs to Agnostidae	stated with evidence	Henningsmoen, 1958
Agnostus	genus	belongs to Agnostida	second hand	Sepkoski, 2002
Agnostus	genus	belongs to Agnostidae	stated without evidence	Jell and Adrain, 2002

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

516 - 513 Ma
Cambrian

Last Recorded Appearance

485 - 472 Ma
Paleozoic

Environment

marine (based on Trilobita)

Motility

slow-moving (based on Agnostida)

Vision

blind (based on Agnostidae)

Diet

detritivore (based on Agnostida)

Ontogeny

molting,addition of parts (based on Trilobita)

Ecospace Comments

Nektonic, swimming (McKerrow, 1979).

Taphonomy

low Mg calcite, chitin (based on Trilobita)

Primary Reference (PBDB)

J. J. Sepkoski, Jr. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560

Wikipedia

https://en.wikipedia.org/wiki/Agnostus

Fossil Distribution

Subtaxa

Name	Status	Common Name(s)	Fossil Occurrences	Oldest	Youngest
Agnostus (Agnostus) ✝ subgenus	listed (PBDB)		18	541 Ma Cambrian	541 Ma Cambrian
Agnostus (Homagnostus) ✝ subgenus	listed (PBDB)		62	501 Ma Cambrian	497 Ma Cambrian
Agnostus arcanus species	accepted (GBIF)	No associated record in PBDB
Agnostus artilimbatus ✝ species	accepted (GBIF) listed (PBDB)		10	505 Ma Cambrian	501 Ma Cambrian
Agnostus babcocki ✝ species	accepted (GBIF) listed (PBDB)		2	513 Ma Cambrian	513 Ma Cambrian
Agnostus barlowi species	accepted (GBIF)	No associated record in PBDB
Agnostus bidens species	accepted (GBIF)	No associated record in PBDB
Agnostus bonnerensis species	accepted (GBIF)	No associated record in PBDB
Agnostus brevispinus species	accepted (GBIF)	No associated record in PBDB
Agnostus brighamensis ✝ species	accepted (GBIF) listed (PBDB)
Agnostus captiosus ✝ species	accepted (GBIF) listed (PBDB)		6	499 Ma Cambrian	499 Ma Cambrian
Agnostus clarae species	accepted (GBIF)	No associated record in PBDB
Agnostus coloradoensis species	accepted (GBIF)	No associated record in PBDB
Agnostus comes species	accepted (GBIF)	No associated record in PBDB
Agnostus damesi species	accepted (GBIF)	No associated record in PBDB
Agnostus desideratus ✝ species	accepted (GBIF) listed (PBDB)
Agnostus egenus species	accepted (GBIF)	No associated record in PBDB
Agnostus girvanensis species	accepted (GBIF)	No associated record in PBDB
Agnostus hastatus species	accepted (GBIF)	No associated record in PBDB
Agnostus insuetus species	accepted (GBIF)	No associated record in PBDB
Agnostus interstrictus species	accepted (GBIF)	No associated record in PBDB
Agnostus kushanensis species	accepted (GBIF)	No associated record in PBDB
Agnostus lautus species	accepted (GBIF)	No associated record in PBDB
Agnostus liaotungensis species	accepted (GBIF)	No associated record in PBDB
Agnostus longifrons species	accepted (GBIF)	No associated record in PBDB
Agnostus maladensis species	accepted (GBIF)	No associated record in PBDB
Agnostus neglectus ✝ species	accepted (GBIF) listed (PBDB)		2	513 Ma Cambrian	501 Ma Cambrian
Agnostus neon species	accepted (GBIF)	No associated record in PBDB
Agnostus nordicus species	accepted (GBIF)	No associated record in PBDB
Agnostus perrugatus species	accepted (GBIF)	No associated record in PBDB
Agnostus rectangularis species	accepted (GBIF)	No associated record in PBDB
Agnostus richmondensis species	accepted (GBIF)	No associated record in PBDB
Agnostus robustus species	accepted (GBIF)	No associated record in PBDB
Agnostus tardus ✝ species	accepted (GBIF) listed (PBDB)
Agnostus valentinus ✝ species	accepted (GBIF) listed (PBDB)		1	501 Ma Cambrian	501 Ma Cambrian
Agnostus vaningeni species	accepted (GBIF)	No associated record in PBDB
Agnostus varius species	accepted (GBIF)	No associated record in PBDB
Agnostus viator species	accepted (GBIF)	No associated record in PBDB
Agnostus yellowstonensis species	accepted (GBIF)	No associated record in PBDB

Synonymy List

Year	Name and Author
1822	Agnostus Brongniart
1958	Agnostus Henningsmoen
1997	Agnostus Whittington et al. p. 339
2002	Agnostus Jell and Adrain p. 338
2002	Agnostus Sepkoski, Jr.

References

Sepkoski, Jr. J. J. (2002) A compendium of fossil marine animal genera, Bulletins of American Paleontology 363, 1-560

Henningsmoen G. (1958) The Upper Cambrian faunas of Norway\r\nWith Descriptions of Non-Olenid Invertebrate Fossils, Norsk Geologisk Tidsskrift, 180-194

Whittington H. B., Chatterton B. D. E., et al (1997) Trilobita. Introduction, Order Agnostina, Order Redlichiida. Volume 1, Treatise on Invertebrate Paleontology O, 1-530

Jell P. A., Adrain J. M. (2002) Available generic names for trilobites, Memoirs of the Queensland Museum 48 2, 331-553

Nomenclator Zoologicus (authority adjusted) - via The Interim Register of Marine and Nonmarine Genera

Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera

SN2000: Brands, S. J. (compiler) 1989-2005. Systema Naturae 2000. Amsterdam, The Netherlands (2006 version). Available online at http://sn2000.taxonomy.nl/. - via The Interim Register of Marine and Nonmarine Genera

extinct group - via The Interim Register of Marine and Nonmarine Genera

in Brongniart & Desmarest, H. N. Crust. Foss. - via The Interim Register of Marine and Nonmarine Genera

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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