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Polyptychites (Amundiptychites) sphaericus
Taxonomy
Polyptychites sphaericus was named by Koenen (1902) [DISTRIBUTION: Valanginian; Greenland, Siberia.]. It is not a trace fossil. It is the type species of Hollwediceras.
It was recombined as Hollwediceras sphaericus by Jeletzky and Kemper (1988); it was recombined as Polyptychites (Amundiptychites) sphaericus by Alsen (2006).
It was recombined as Hollwediceras sphaericus by Jeletzky and Kemper (1988); it was recombined as Polyptychites (Amundiptychites) sphaericus by Alsen (2006).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1902 | Polyptychites sphaericus Koenen figs. pl. 4, figs. 1-5 |
| 1988 | Hollwediceras sphaericus Jeletzky and Kemper p. 87 figs. Pl 30, figs 1-3; text-figs 34a,b |
| 2006 | Polyptychites (Amundiptychites) sphaericus Alsen p. 110 |
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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.
†Polyptychites (Amundiptychites) sphaericus Koenen 1902
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Late/Upper Valanginian or 137.05000 to 132.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Valanginian | Poland (Gmina Tomaszów Mazowiecki) | Hollwediceras sphaericus (192523) |