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Christiania bilobata
Taxonomy
Christiania tenuicincta bilobata was named by Reed (1917).
It was recombined as Christiania bilobata by Williams (1962) and Candela and Harper (2014).
It was recombined as Christiania bilobata by Williams (1962) and Candela and Harper (2014).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Christiania tenuicincta bilobata Reed p. 902 figs. Plate XVIII, fig. 19 |
| 1962 | Christiania bilobata Williams pp. 196 - 197 figs. Pl. XIX, figs. 2, 3, 6, 10 |
| 2014 | Christiania bilobata Candela and Harper pp. Supplement 1 |
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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 bilobata Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Elongately quadrate and auriculate Christiania with the anterior and postero-median portions of the valves strongly concavo-convex but flattening out postero-laterally to form a pair of plane triangular areas; ornamentation including well-developed concentric growth-lines and fine radial costellae; dental lamellae narrowly divergent and almost one-third as long as the pedicle valve; dorsal septa straight and subparallel; adductor muscle-scars confined anteriorly by a pair of curved ridges and divided obliquely by a pair of low divergent ridges. |
Measurements
No measurements are available
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| Source: g = genus, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Hendy et al. 2009, Aberhan et al. 2004 | |||||
Age range: base of the Burrellian to the top of the Cheneyan or 456.60000 to 451.30000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burrellian | United Kingdom (Scotland) | Christiania bilobata (192745) | |
| Cheneyan | United Kingdom (Scotland) | Christiania bilobata (164412) |