| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Frejidae was named by Ratter and Cope (1998).
It was assigned to Arcoidea by Ratter and Cope (1998), Nevesskaja (2009), Bouchet et al. (2010) and Carter et al. (2011).
It was assigned to Arcoidea by Ratter and Cope (1998), Nevesskaja (2009), Bouchet et al. (2010) and Carter et al. (2011).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Frejidae Ratter and Cope |
| 2009 | Frejdidae Nevesskaja |
| 2010 | Frejidae Bouchet et al. |
| 2011 | Frejidae Carter et al. p. 7 |
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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
Measurements
No measurements are available
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| Source: superf = superfamily, o = order, c = class | |||||
| References: Aberhan et al. 2004, Hendy et al. 2009 | |||||
Age range: base of the Homerian to the top of the Ludfordian or 430.50000 to 423.00000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wenlock | United Kingdom (Wales) | Trecanolia acincta (123136) Uskardita mikraulax (123137) | |
| Homerian | Sweden (Gotland) | Freja fecunda (13851) | |
| Gorstian | Sweden (Gotland) | Freja nodosa (13603) | |
| Ludfordian | Sweden (Gotland) | Freja nodosa (70432) |