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Polymeres demetarum

Cephalopoda - Dissidocerida - Orthoceratoidea

Taxonomy
Polymeres demetarum was named by Murchison (1839). Its type specimen is BGS Geol. Soc. Coll. 6960, a partial shell (phragmocone), and it is a cast. Its type locality is Road cut at Roman Rd., Pensarn, which is in a Moridunian offshore mudstone in the Ogof Hen Formation of the United Kingdom. It is the type species of Polymeres.

Entered
by B. Kröger on 2009-03-10; modified by T. Liebrecht on 2013-04-30

Synonyms
  • Orthoceras eoum was named by Blake (1882). Its type specimen is BGS GSM 37526 and is not a trace fossil. Its type locality is Lords Hill, which is in a Moridunian coastal siltstone/siltstone in the Mytton Flags Formation of the United Kingdom.

    It was synonymized subjectively with Polymeres demetarum by Evans (2005).
Synonymy list
YearName and author
1839Polymeres demetarum Murchison p. 698
1882Orthoceras eoum Blake

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classCephalopodaCuvier 1797
familyOrthoceratoidea()
orderDissidoceridaZhuravleva 1964
familyPolymeridae
genusPolymeresMurchison 1839
speciesdemetarumMurchison 1839

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Polymeres demetarum Murchison 1839
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Invalid names: Orthoceras eoum Blake 1882 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragonitec
Environment: marinec
Locomotion: fast-movingc
Life habit: nektonicc
Diet: carnivorec
Vision: well-developedc
Created: 2004-02-28 11:51:48
Modified: 2023-08-18 17:28:37
Source: c = class
Reference: Kiessling 2004

Age range: Moridunian or 477.10000 to 473.80000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Moridunian477.1 - 473.8United Kingdom (England) Orthoceras eoum (89440)
Moridunian477.1 - 473.8United Kingdom (Wales) Polymeres demetarum (89318 type locality: 89323 89443)