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Marjumiidae ✝

Photos

Photo Gallery

Modocia sp.

House Range, Millard County, Utah, USA

Modocia sp.

House Range, Millard County, Utah, USA

Modocia sp.

House Range, Millard County, Utah, USA

Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	3266879	https://www.gbif.org/species/3266879
PaleoBioDB ID (PBDB)	133740	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=133740

Rank

family

Taxonomy (GBIF)

Life : Animalia : Arthropoda : Trilobita : Agnostida : Marjumiidae

Taxonomy (PBDB)

Life : Animalia : Arthropoda : Trilobita : Aulacopleurida : Marjumiidae

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	Aulacopleurida	Adrain 2011
family	Marjumiidae	Kobayashi 1935

Scientific Name

Marjumiidae

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Marjumiidae	family	belongs to Ptychopariida	stated with evidence	Whittington et al., 1997
Marjumiidae	family	belongs to Trilobita	stated without evidence	Bruton and Harper, 2000
Marjumiidae	family	belongs to Ptychopariida	stated without evidence	Jell and Adrain, 2002
Marjumiidae	family	belongs to Aulacopleurida	stated with evidence	Adrain, 2011

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

516 - 505 Ma
Cambrian

Last Recorded Appearance

501 - 485 Ma
Cambrian

Environment

marine (based on Trilobita)

Motility

fast-moving (based on Trilobita)

Vision

well-developed

Diet

carnivore (based on Trilobita)

Ontogeny

molting,addition of parts (based on Trilobita)

Taphonomy

low Mg calcite, chitin (based on Trilobita)

Primary Reference (PBDB)

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

Fossil Distribution

Subtaxa

Name	Status	Common Name(s)	Fossil Occurrences	Oldest	Youngest
Aposolenopleura ✝ genus	accepted (GBIF) listed (PBDB)
Armonia ✝ genus	doubtful (GBIF) listed (PBDB)		2	541 Ma Cambrian
Bemaspis ✝ genus	accepted (GBIF) listed (PBDB)
Crepichilella ✝ genus	accepted (GBIF) listed (PBDB)
Holmdalia ✝ genus	doubtful (GBIF) listed (PBDB)		5	513 Ma Cambrian	501 Ma Cambrian
Ithyektyphus ✝ genus	doubtful (GBIF) listed (PBDB)		1	513 Ma Cambrian	513 Ma Cambrian
Lecanopleura ✝ genus	accepted (GBIF) listed (PBDB)		2	541 Ma Cambrian	541 Ma Cambrian
Marjumia ✝ genus	accepted (GBIF) listed (PBDB)		17	513 Ma Cambrian	513 Ma Cambrian
Modocia ✝ genus	accepted (GBIF) listed (PBDB)		56	516 Ma Cambrian	501 Ma Cambrian
Nasocephalus ✝ genus	accepted (GBIF) listed (PBDB)		7	513 Ma Cambrian	501 Ma Cambrian
Nericella ✝ genus	accepted (GBIF) listed (PBDB)		2	505 Ma Cambrian	505 Ma Cambrian
Nericia ✝ genus	accepted (GBIF) listed (PBDB)
Pearylandia ✝ genus	doubtful (GBIF) listed (PBDB)		11	513 Ma Cambrian	513 Ma Cambrian
Punctularia genus	accepted (GBIF)	No associated record in PBDB
Shickshockia ✝ genus	doubtful (GBIF) listed (PBDB)		1	501 Ma Cambrian	501 Ma Cambrian
Syspacheilus ✝ genus	accepted (GBIF) listed (PBDB)		8	513 Ma Cambrian	501 Ma Cambrian
Yabeia ✝ genus	accepted (GBIF) listed (PBDB)		2	505 Ma Cambrian	505 Ma Cambrian
Dellea saratoga species	accepted (GBIF)	No associated record in PBDB
Eshelmania convexa species	accepted (GBIF)	No associated record in PBDB
Eshelmania snobergensis species	accepted (GBIF)	No associated record in PBDB

Synonymy List

Year	Name and Author
1935	Marjumiidae Kobayashi
1954	Coosellidae Palmer
1997	Marjumiidae Whittington et al. p. 302
2000	Marjumiidae Bruton and Harper
2002	Marjumiidae Jell and Adrain p. 474
2011	Marjumiidae Adrain p. 106

References

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

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

Bruton D. L., Harper D. A. T. (2000) A mid-Cambrian shelly fauna from Ritland, western Norway and its palaeogeographical implications, Bulletin of the Geological Society of Denmark 47, 29-51

Adrain J. M. (2011) Class Trilobita Walch, 1771, Animal biodiversity: an outline of higher-level classification and survey of taxonomic richness 3148, 104-109

Benton, M.J. (ed). (1993). The Fossil Record 2. Chapman & Hall, London, 845 pp. - via The Interim Register of Marine and Nonmarine Genera

Museum Victoria KEmu database (Oct 2006) - 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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