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Trepassia wardae
Taxonomy
Charnia wardi was named by Narbonne and Gehling (2003). It is a cast. Its type locality is Calvert, which is in an Ediacaran submarine fan shale/sandstone in the Drook Formation of Canada. It is the type species of Trepassia.
It was recombined as Trepassia wardae by Narbonne et al. (2009).
It was recombined as Trepassia wardae by Narbonne et al. (2009).
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Charnia wardi Narbonne and Gehling pp. 515-517 |
| 2007 | Charnia wardi Laflamme et al. |
| 2009 | Trepassia wardae Narbonne et al. |
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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.
†Trepassia wardae Narbonne and Gehling 2003
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Laflamme et al. 2007 | Very long, parallel-sided Charnia that distally narrows to an acute tip, with straight central ridge or furrow. Complete specimens typically with .10:1 length v. width ratios. Primary branching angle typically greater than 45 (average range between 44–74), with occasional acutely angled branch bundles (average range between 24–35). | |
| G. M. Narbonne et al. 2009 | Rangeomorph frond that is parallel-sided and narrows to an acute tip, with straight central ridge or furrow. Primary and secondary branches emanate from a straight central axis or stalk in the petalodium, with tertiary branches arranged at an acute angle to the secondary branches. All branches show exclusively single-sided rangeomorph structure. |
Measurements
No measurements are available
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| Source: s = species | |||||
| Reference: Narbonne et al. 2009 | |||||
Age range: Ediacaran or 635.00000 to 541.00000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ediacaran | Canada (Nova Scotia) | Trepassia wardae (169292 236917) | |
| Ediacaran | Canada (Newfoundland and Labrador) | Charnia wardi (type locality: 51740 51741) Charnia wardi, Trepassia wardae (89096) Trepassia wardae (90710 236918) |