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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Williriedellum madstonense
Taxonomy
Quarkus madstonensis was named by Pessagno et al. (1993). It is not extant.
It was recombined as Williriedellum madstonense by O'Dogherty et al. (2006).
It was recombined as Williriedellum madstonense by O'Dogherty et al. (2006).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1993 | Quarkus madstonensis Pessagno and et al. |
| 2006 | Williriedellum madstonense O'Dogherty 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.
†Williriedellum madstonense Pessagno 1993
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 1999 | |||||
Age range: base of the Early/Lower Bajocian to the top of the Middle Bathonian or 170.90000 to 165.30000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bajocian | USA (California) | Quarkus madstonensis (51631 51635) | |
| Early/Lower Bajocian - Late/Upper Bajocian | Armenia | Williriedellum madstonense (131355) | |
| Middle Bathonian | Switzerland | Williriedellum madstonense (66940) |