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Gaudryceras makarovense
Taxonomy
Gaudryceras makarovense was named by Shigeta and Maeda (2005). Its type specimen is NMNS PM17205, a shell, and it is a 3D body fossil. Its type locality is MK4030, Victoria River, Makarov area, which is in a Maastrichtian marine sandstone in the Krasnoyarka Formation of the Russian Federation.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2005 | Gaudryceras makarovense Shigeta and Maeda p. 73 figs. 15.3, 32.4, 33-37 |
| 2015 | Gaudryceras makarovense Shigeta et al. p. 115 figs. 6A-E, 7A-C |
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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.
†Gaudryceras makarovense Shigeta and Maeda 2005
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 18.7 | 10.3 | 46.0 | 13.8 | 19.7 | |
| shell diameter | 3 | 53.0 | 35.4 | 108.0 | 39.0 | 40.9 | |
| shell inflation | 3 | 22.6 | 17.0 | 38.2 | 17.7 | 12.0 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Late/Upper Maastrichtian or 72.20000 to 66.00000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Maastrichtian | Russian Federation | Gaudryceras makarovense (236992 237624 237625 237626 type locality: 237628) | |
| Late/Upper Maastrichtian | Japan | Gaudryceras makarovense (167905 167907) |