| Measurements | D mm | H/D | T/D | O/D | H/T |
|---|---|---|---|---|---|
| CP-582 | 30.9 | 0.46 | 0.36 | 0.24 | 1.26 |
| Jaffré 2022 p.85 | 34.8 | 0.43 | 0.34 | 0.24 | 1.27 |
| RJ-800 | 43.4 | 0.42 | 0.32 | 0.27 | 1.34 |
| Lectotype Casey 1961 | 56 | 0.45 | 0.34 | 0.23 | 1.32 |
| Age | Origin |
|---|---|
|
Grey clay O. subhilli zone Lower Albian |
Bully, Pays de Bray Seine Maritime Normandy, France |
Description. Specimen from the Otohoplites subhilli zone of Bully, Seine-Maritime (Normandy). It comprises a pyritic nucleus covered by a pearly test, unfortunately undergoing inexorable decomposition, and the beginning of the black phosphate body chamber on the last quarter of whorl. Some portions of sutures are visible where the test is absent. Ten strong, flared, and flexuous ribs cross venter while forming a pronounced forward sinus. Each of these ribs is bordered anteriorly and posteriorly by a constriction and a weak riblet, both discernible only on the outer half of the flanks. This individual has a more compressed whorl section and more numerous ribs than CP-582, which brings it closer to B. albense. We nevertheless assign it to B. dupinianum because the ribs of B. albense are not as strong.