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Opsiconidion

Lingulata - Acrotretida - Biernatidae

Taxonomy
Opsiconidion was named by Ludvigsen (1974) [Sepkoski's age data: O Ashg-l D Fras Sepkoski's reference number: 1066]. It is not extant.

It was assigned to Biernatinae by Holmer (1989); to Biernatidae by Williams et al. (2000); and to Atrypida by Sepkoski (2002).

Synonyms
Synonymy list
YearName and author
1974Opsiconidion Ludvigsen
1989Opsiconidion Holmer
2000Opsiconidion Williams et al. p. 131
2002Caenotreta Sepkoski, Jr.
2002Opisconidion Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
RankNameAuthor
phylumBrachiopodaCuvier 1805
subphylumLinguliformeaWilliams et al. 1996
classLingulataGorjansky and Popov 1985
orderAcrotretidaKuhn 1949
familyBiernatidaeHolmer 1989
genusOpsiconidionLudvigsen 1974

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.

Diagnosis
No diagnoses are available