Macroscaphites yvanii (microconch)
Ammonoidea
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Macroscaphites yvanii occurs from the Upper Barremian (Sartousiana Zone) to the Lower Aptian.
2012 . Baudouin, C., Delanoy, G., Boselli, P., Bert, D. & Boselli, M.
Les faunes d’ammonites de la sous-zone à Sarasini (Barrémien supérieur) dans les Barronies (Drôme, France) [Revue de Paléobiologie (Vol 31, n°2)] - Muséum d’Histoire Naturelle - Ville de Genève, Suisse
pl. IX, fig. 1 to 6
1980 . Thomel, G.
Ammonites - Serre
p. 45, fig. 76
| Field name | New value | Old value |
|---|---|---|
| Species | yvanii | yvani |
| Description |
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The early whorls, planispirally coiled and highly evolute, are followed by a more or less straight section. The senile stage is materialized by a section of shell that turns back on itself in a hook like shape. Ornamentation based on straight, radial and simple ribs, with sporadic constrictions. At the shaft and the hook the ribs become proradiate and may be bifurcated.
Macroscaphites yvanii occurs from the Upper Barremian (Sartousiana Zone) to the Lower Aptian. |
Show / Hide
The early whorls, planispirally coiled and highly evolute, are followed by a more or less straight section. The senile stage is materialized by a section of shell that turns back on itself in a hook like shape.
Macroscaphites occurs from Lower Barremian to Lower Aptian. |
| Field name | New value | Old value |
|---|---|---|
| Documents | 2 document(s) | 0 document(s) |