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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Spironema
Taxonomy
Spironema was named by Meek (1876) [Sepkoski's age data: K Maes-l].
It was assigned to Mathildidae by Wenz (1938); and to Neotaenioglossa by Sepkoski (2002).
It was assigned to Mathildidae by Wenz (1938); and to Neotaenioglossa by Sepkoski (2002).
Species lacking formal opinion data
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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.
G. †Spironema Meek 1876
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Hendy et al. 2009 | |||||
Age range: base of the Maastrichtian to the top of the Danian or 72.10000 to 61.60000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Maastrichtian | USA (Texas) | S. perryi (7493) | |
| Danian | USA (Illinois) | S. perryi (70129) |