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Christiania holtedahli
Taxonomy
Christiania holtedahli was named by Spjeldnaes (1957) [= Christiania tenuicincta Holtedahl 1916, pp. 85-86, pl. 16, figs. 4-8.]. Its type specimen is PMO L 0071 and is a 3D body fossil. Its type locality is Bratterud, Lower Chasmops Shale, which is in a Haljala/Keila marine shale in the Arnestad Formation of Norway.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Christiania holtedahli Spjeldnaes pp. 111 - 122 figs. Pl. 5, figs. 1-ll, 15-16, Pl. 6, fig. 10, textfigs. 12L, 25 , 26A, 27B, 28C, 29-31 |
| 2006 | Christiania holtedahli Popov and Cocks p. 263 |
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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.
†Christiania holtedahli Spjeldnaes 1957
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N. Spjeldnaes 1957 | Christiania species with small, bifid cardinal processes, diagonal branchial septum ancylosed both to the lateral and central branchial septa, forming a transverse septum between them. The socket plates are thin and ancylosed to the lateral branchial septa. The median septum is thin, and weakly developed in most specimens. The valves are pseudopunctate mainly in their lateral parts. |
Measurements
No measurements are available
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| Source: g = genus, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Haljala to the top of the Longvillian or 456.80000 to 455.00000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Costonian - Longvillian | Norway (Oslo) | Christiania holtedahli (194668) | |
| Haljala | Norway (Oslo) | Christiania holtedahli (186391) | |
| Haljala - Keila | Norway (Oslo) | Christiania holtedahli (type locality: 162992) | |
| Haljala - Keila | Norway (Asker) | Christiania holtedahli (194667 194813) | |
| Haljala - Keila | Norway (Ringerike) | Christiania holtedahli (194814) |