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Xenoschrammenum alternans
Taxonomy
Amphiblestrum alternans was named by Schrammen (1937). It is not extant.
It was recombined as Tremaphorus alternans by Wagner (1963); it was recombined as Xenoschrammenum alternans by Trammer (1982).
It was recombined as Tremaphorus alternans by Wagner (1963); it was recombined as Xenoschrammenum alternans by Trammer (1982).
Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Amphiblestrum alternans Schrammen |
| 1963 | Tremaphorus alternans Wagner |
| 1982 | Xenoschrammenum alternans Trammer |
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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.
†Xenoschrammenum alternans Schrammen 1937
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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, Bambach et al. 2007 | |||||
Age range: base of the Early/Lower Oxfordian to the top of the Early/Lower Tithonian or 161.20000 to 145.00000 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Oxfordian | Poland | Xenoschrammenum alternans (114497) | |
| Late/Upper Oxfordian | Germany | Xenoschrammenum alternans (74047) | |
| Late/Upper Oxfordian | Poland | Xenoschrammenum alternans (60851 60852 60854 60855 60856) | |
| Middle Oxfordian | Poland | Xenoschrammenum alternans (60812 60850 114252) | |
| Late/Upper Kimmeridgian | Germany | Xenoschrammenum alternans (74099) | |
| Early/Lower Tithonian | Germany | Tremaphorus alternans (34608) |