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Agnostidae ✝

Description

Agnostidae is a family of Agnostida trilobites. Like all Agnostina, they were eyeless and only bore two thoracic segments. They ranged in benthic waters across the globe from 508 to 461 million years ago, containing the following genera, among others:


From Wikipedia article at https://en.wikipedia.org/wiki/Agnostidae, which is released under the Creative Commons Attribution-Share-Alike License 3.0.
Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)4639367https://www.gbif.org/species/4639367
PaleoBioDB ID (PBDB)82583https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=82583
Rankfamily
Taxonomy (GBIF,PBDB)Life : Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-Bilateria
-EubilateriaAx 1987
-ProtostomiaGrobben 1908
-Ecdysozoa
-Panarthropoda
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderAgnostidaSalter 1864
familyAgnostidaeM'Coy 1849
Scientific NameAgnostidae
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Agnostidaefamilybelongs to Agnostaceastated with evidenceHenningsmoen, 1952
Agnostidaefamilybelongs to Agnostinastated without evidenceHarrington and Leanza, 1957
Agnostidaefamilybelongs to Agnostoideastated without evidenceWestrop et al., 1996
Agnostidaefamilybelongs to Agnostidastated with evidenceWhittington et al., 1997
Agnostidaefamilybelongs to Agnostidastated without evidenceHong et al., 2003
Status (PBDB)extinct
Taxon Size (PBDB)185
First Recorded Appearance516 - 513 Ma
Cambrian
Last Recorded Appearance458 - 453 Ma
Ordovician
Environmentmarine (based on Trilobita)
Motilityslow-moving (based on Agnostida)
Visionblind
Dietdetritivore (based on Agnostida)
Ontogenymolting,addition of parts (based on Trilobita)
Ecospace CommentsBODY SIZE: Based on component genera; 7 of 8 genera share 1.0 to < 10 length, 8 of 8 share 1.0 to < 10 width.
Taphonomylow Mg calcite, chitin (based on Trilobita)
Primary Reference (PBDB)J.-S. Bao and J.B. Jago. 2000. Late Late Cambrian trilobites from near Birch Inlet, south-western Tasmania. Palaeontology 43(5):881-917
Wikipediahttps://en.wikipedia.org/wiki/Agnostidae

External Images

Fossil Distribution

Subtaxa

NameStatusCommon Name(s)Fossil OccurrencesOldestYoungest
Peronopsinae ✝
subfamily		listed (PBDB)
Ptychagnostinae ✝
subfamily		listed (PBDB)
Acmarhachis ✝
genus		accepted (GBIF)
listed (PBDB)		71505 Ma
Cambrian		485 Ma
Cambrian
Acutatagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		24501 Ma
Cambrian		499 Ma
Cambrian
Agnostardis ✝
genus		accepted (GBIF)
listed (PBDB)		5501 Ma
Cambrian		501 Ma
Cambrian
Agnostus ✝
genus		accepted (GBIF)
listed (PBDB)		128516 Ma
Cambrian		485 Ma
Cambrian
Ammagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		129513 Ma
Cambrian		499 Ma
Cambrian
Biciragnostus ✝
genus		accepted (GBIF)
listed (PBDB)		5501 Ma
Cambrian		499 Ma
Cambrian
Connagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		13505 Ma
Cambrian		499 Ma
Cambrian
Distagnostus
genus		accepted (GBIF)No associated record in PBDB
Eolotagnostus
genus		accepted (GBIF)No associated record in PBDB
Eurudagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		32499 Ma
Cambrian		499 Ma
Cambrian
Formosagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		13505 Ma
Cambrian		501 Ma
Cambrian
Glyptagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		97513 Ma
Cambrian		501 Ma
Cambrian
Gymnagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		27501 Ma
Cambrian		485 Ma
Cambrian
Hadragnostus ✝
genus		accepted (GBIF)
listed (PBDB)		38505 Ma
Cambrian		501 Ma
Cambrian
Homagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		109513 Ma
Cambrian		485 Ma
Cambrian
Idolagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		8501 Ma
Cambrian		501 Ma
Cambrian
Innitagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		67513 Ma
Cambrian		497 Ma
Cambrian
Ivshinagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		37501 Ma
Cambrian		497 Ma
Cambrian
Kormagnostella ✝
genus		accepted (GBIF)
listed (PBDB)		14505 Ma
Cambrian		499 Ma
Cambrian
Kormagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		177513 Ma
Cambrian		497 Ma
Cambrian
Leiagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		35513 Ma
Cambrian		458 Ma
Middle Ordovician
Lotagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		128501 Ma
Cambrian		485 Ma
Cambrian
Micragnostus ✝
genus		accepted (GBIF)
listed (PBDB)		229501 Ma
Cambrian		479 Ma
Early/Lower Ordovician
Neoagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		148501 Ma
Cambrian		485 Ma
Cambrian
Oncagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		17501 Ma
Cambrian		501 Ma
Cambrian
Oxyagnostus ✝
genus		doubtful (GBIF)
listed (PBDB)		2501 Ma
Cambrian		497 Ma
Cambrian
Phalagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		26513 Ma
Cambrian		501 Ma
Cambrian
Proagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		47513 Ma
Cambrian		501 Ma
Cambrian
Quadrahomagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		9505 Ma
Cambrian		499 Ma
Cambrian
Strictagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		24499 Ma
Cambrian		497 Ma
Cambrian
Trilobagnostus ✝
genus		accepted (GBIF)
listed (PBDB)		38501 Ma
Cambrian		494 Ma
Cambrian

Synonymy List

YearName and Author
1849Agnostidae M'Coy
1952Agnostidae Henningsmoen
1957Agnostidae Harrington and Leanza
1996Agnostidae Westrop et al. p. 812
1997Agnostidae Whittington et al. p. 339
2003Agnostidae Hong et al.

References

Bao J.-S., Jago J.B. (2000) Late Late Cambrian trilobites from near Birch Inlet, south-western Tasmania, Palaeontology 43 5, 881-917
Henningsmoen G. (1952) Early middle Cambrian fauna from Rogaland, SW Norway (Paradoxides oelandicus stage = lc Ξ±) , Norsk Geologisk Tidsskrift 30, 13-30
Harrington H. J., Leanza A. F. (1957) Ordovician trilobites of Argentina, Department of Geology, University of Kansas Special Publication. Lawrence: University of Kansas Press 1, 1-276
Westrop S. R., Ludvigsen R., et al (1996) Marjuman (Cambrian) agnostoid trilobites of the Cow Head Group, western Newfoundland, Journal of Paleontology 70 5, 804-829
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
Hong P.S., Lee J. G., et al (2003) Trilobites from the Lejopyge armata zone (Upper Middle Cambrian) of the Machari Formation, Yongwol Group, Korea, Journal of Paleontology 77 5, 895-907
Benton, M.J. (ed). (1993). The Fossil Record 2. Chapman & Hall, London, 845 pp. - 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
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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