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Pliomeridae ✝

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Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	Not linked to a GBIF record.
PaleoBioDB ID (PBDB)	124266	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=124266

Rank

family (PBDB)

Taxonomy (PBDB)

Life : Animalia : Arthropoda : Trilobita : Phacopida : Pliomeridae

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	Phacopida	Salter 1864
suborder	Cheirurina	Harrington and Leanza 1957
family	Pliomeridae	Raymond 1913

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Pliomeridae	family	belongs to Cheirurina	stated without evidence	Harrington and Leanza, 1957
Pliomeridae	family	belongs to Cheirurina	stated with evidence	Nikolaisen, 1961
Pliomeridae	family	belongs to Phacopida	stated with evidence	Whittington et al., 1997
Pliomeridae	family	belongs to Phacopida	stated without evidence	Fortey and Droser, 1999
Pliomeridae	family	belongs to Cheirurina	stated with evidence	Adrain, 2011

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

488 - 479 Ma
Paleozoic

Last Recorded Appearance

450 - 443 Ma
Paleozoic

Environment

marine (based on Trilobita)

Motility

fast-moving (based on Trilobita)

Vision

well-developed (based on Pliomeridae)

Diet

carnivore (based on Trilobita)

Ontogeny

molting,addition of parts (based on Trilobita)

Ecospace Comments

BODY SIZE: Based on component genera; 5 of 5 genera share 10 to < 100 length, 4 of 5 share 10 to < 100 width.

Taphonomy

low Mg calcite, chitin (based on Trilobita)

Primary Reference (PBDB)

R. A. Fortey and M. L. Droser. 1999. Trilobites from the Base of the Type Whiterockian (Middle Ordovician) in Nevada. Journal of Paleontology 73(2):182-201

Fossil Distribution

Subtaxa

Name	Status	Fossil Occurrences	Oldest	Youngest
Cybelopsinae ✝ subfamily	listed (PBDB)	151	488 Ma Cambrian	461 Ma Middle Ordovician
Pliomerinae ✝ subfamily	listed (PBDB)	91	485 Ma Cambrian	461 Ma Middle Ordovician
Anapliomera ✝ genus	accepted (GBIF) listed (PBDB)	1	461 Ma Middle Ordovician	461 Ma Middle Ordovician
Benedettia ✝ genus	doubtful (GBIF) listed (PBDB)	3	479 Ma Early/Lower Ordovician	479 Ma Early/Lower Ordovician
Colobinion ✝ genus	accepted (GBIF) listed (PBDB)	2	479 Ma Early/Lower Ordovician	472 Ma Early/Lower Ordovician
Encrinurella ✝ genus	doubtful (GBIF) listed (PBDB)	14	479 Ma Early/Lower Ordovician	450 Ma Late/Upper Ordovician
Evropeites ✝ genus	accepted (GBIF) listed (PBDB)	9	479 Ma Early/Lower Ordovician	472 Ma Early/Lower Ordovician
Gogoella ✝ genus	accepted (GBIF) listed (PBDB)	1	479 Ma Early/Lower Ordovician	479 Ma Early/Lower Ordovician
Guizhoupliomerops ✝ genus	doubtful (GBIF) listed (PBDB)	1	479 Ma Early/Lower Ordovician	479 Ma Early/Lower Ordovician
Hintzeia ✝ genus	accepted (GBIF) listed (PBDB)	40	488 Ma Cambrian	470 Ma Middle Ordovician
Ibexaspis ✝ genus	accepted (GBIF) listed (PBDB)	2	479 Ma Early/Lower Ordovician	479 Ma Early/Lower Ordovician
Josephulus ✝ genus	doubtful (GBIF) listed (PBDB)	1	453 Ma Late/Upper Ordovician	453 Ma Late/Upper Ordovician
Leiostrototropis ✝ genus	accepted (GBIF) listed (PBDB)	1	479 Ma Early/Lower Ordovician	479 Ma Early/Lower Ordovician
Obliteraspis ✝ genus	doubtful (GBIF) listed (PBDB)	2	479 Ma Early/Lower Ordovician	479 Ma Early/Lower Ordovician
Ovalocephalus ✝ genus	accepted (GBIF) listed (PBDB)	99	479 Ma Early/Lower Ordovician	450 Ma Late/Upper Ordovician
Parapliomera ✝ genus	doubtful (GBIF) listed (PBDB)	8	485 Ma Cambrian	479 Ma Early/Lower Ordovician
Perissopliomera ✝ genus	accepted (GBIF) listed (PBDB)	2	472 Ma Early/Lower Ordovician	472 Ma Early/Lower Ordovician
Placoparia ✝ genus	accepted (GBIF) listed (PBDB)	51	479 Ma Early/Lower Ordovician	458 Ma Middle Ordovician
Pliomera ✝ genus	accepted (GBIF) listed (PBDB)	40	479 Ma Early/Lower Ordovician	450 Ma Late/Upper Ordovician
Pliomerella ✝ genus	accepted (GBIF) listed (PBDB)	6	466 Ma Middle Ordovician	458 Ma Middle Ordovician
Pliomeridius ✝ genus	doubtful (GBIF) listed (PBDB)	12	485 Ma Cambrian	466 Ma Middle Ordovician
Pliomerina ✝ genus	accepted (GBIF) listed (PBDB)	40	485 Ma Cambrian	453 Ma Late/Upper Ordovician
Protoencrinurella ✝ genus	accepted (GBIF) listed (PBDB)	9	477 Ma Early/Lower Ordovician	477 Ma Early/Lower Ordovician
Protopliomerella ✝ genus	accepted (GBIF) listed (PBDB)	19	485 Ma Cambrian	485 Ma Cambrian
Protopliomerops ✝ genus	accepted (GBIF) listed (PBDB)	36	485 Ma Cambrian	479 Ma Early/Lower Ordovician
Pseudomera ✝ genus	accepted (GBIF) listed (PBDB)	87	488 Ma Cambrian	466 Ma Middle Ordovician
Quinquecosta ✝ genus	doubtful (GBIF) listed (PBDB)	6	466 Ma Middle Ordovician	453 Ma Late/Upper Ordovician
Rossaspis ✝ genus	accepted (GBIF) listed (PBDB)	25	485 Ma Cambrian	485 Ma Cambrian
Tesselacauda ✝ genus	accepted (GBIF) listed (PBDB)	15	485 Ma Cambrian	485 Ma Cambrian

Synonymy List

Year	Name and Author
1913	Pliomeridae Raymond
1957	Pliomeridae Harrington and Leanza
1960	Hammatocnemidae Kielan
1961	Pliomeridae Nikolaisen
1997	Pliomeridae Whittington et al. p. 300
1999	Pliomeridae Fortey and Droser p. 195
2011	Pliomeridae Adrain p. 106

References

Fortey R. A., Droser M. L. (1999) Trilobites from the Base of the Type Whiterockian (Middle Ordovician) in Nevada, Journal of Paleontology 73 2, 182-201

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

Nikolaisen F. (1961) The Middle Ordovician of the Oslo Region, Norway 7. Trilobites of the suborder Cheirurina, Norsk Geologisk Tidsskrift 41, 279-310

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

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

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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