| 释义 |
- References
{{italic title}}{{Unreferenced|date=March 2007}}{{Taxobox
| name = Yokoyamaceras
| status = fossil
| fossil_range =
| regnum = Animalia
| phylum = Mollusca
| classis = Cephalopoda
| subclassis = Ammonoidea
| genus = Yokoyamaceras
| genus_authority =
| subdivision_ranks = Species
| subdivision =
}}Yokoyamaceras is an extinct genus of cephalopod belonging to the Ammonite subclass. References {{Taxonbar|from=Q8054689}}{{Ammonite-stub}} 1 : Ammonite genera |