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Jeanbesseiceras jacksoni
Taxonomy
Meekoceras (Prionolobus) jacksoni was named by Hyatt and Smith (1905). It is a 3D body fossil. Its type locality is Paris Canyon, Columbites beds, Bear Lake Valley, which is in a Spathian marine limestone in the Thaynes Formation of Idaho.
It was recombined as Meekoceras jacksoni by Diener (1915); it was recombined as Ophiceras jacksoni by Smith (1932); it was recombined as Nordophiceras jacksoni by Kummel (1969); it was synonymized subjectively with Bajarunia euomphala by Dagis and Ermakova (1988); it was recombined as Jeanbesseiceras jacksoni by Guex et al. (2010) and Jenks et al. (2013).
It was recombined as Meekoceras jacksoni by Diener (1915); it was recombined as Ophiceras jacksoni by Smith (1932); it was recombined as Nordophiceras jacksoni by Kummel (1969); it was synonymized subjectively with Bajarunia euomphala by Dagis and Ermakova (1988); it was recombined as Jeanbesseiceras jacksoni by Guex et al. (2010) and Jenks et al. (2013).
Synonymy list
| Year | Name and author |
|---|---|
| 1905 | Meekoceras (Prionolobus) jacksoni Hyatt and Smith p. 151 figs. Pl 62, figs 11-21 |
| 1915 | Meekoceras jacksoni Diener |
| 1932 | Ophiceras jacksoni Smith |
| 1969 | Nordophiceras jacksoni Kummel |
| 2010 | Jeanbesseiceras jacksoni Guex et al. p. 76 figs. Pl 43, figs 4,5; pl 44, figs 1-6; pl 45, fig 1; pl 59, fig 4 |
| 2013 | Jeanbesseiceras jacksoni Jenks et al. p. 282 figs. 8N-O,P-S |
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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.
†Jeanbesseiceras jacksoni Hyatt and Smith 1905
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 9 | 14.0 | 6.00 | 25.0 | 15.0 | 4.99 | |
| shell diameter | 9 | 39.8 | 16.5 | 69.0 | 43.0 | 14.0 | |
| shell inflation | 9 | 15.0 | 7.00 | 25.0 | 17.5 | 5.33 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Spathian or 251.30000 to 247.20000 Ma
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Smithian | USA (Idaho) | Meekoceras jacksoni (33288) | |
| Smithian | USA (California) | Meekoceras jacksoni (33298) | |
| Spathian | USA (Utah) | Jeanbesseiceras jacksoni (109390 109395 109396) | |
| Spathian | USA (Idaho) | Jeanbesseiceras jacksoni (109400 109402 109405 109406 109407 123902 150121 150123 150126 150131 150136) Meekoceras jacksoni (33319) Nordophiceras jacksoni (110958) |