Random triples
| Subject | Object |
|---|---|
| gptkb:Atrypa | concentric growth lines |
| gptkb:Siphonotretida | often spinose or pitted |
| gptkb:Conus_textile | smooth |
| gptkb:Ammonite | Ribbed or smooth |
| gptkb:Marginellidae | smooth |
| gptkb:Atrypa_reticularis | finely ribbed |
| gptkb:Atrypa | radial ridges |
| gptkb:Ammonite | Ornamented with spines (in some species) |
| gptkb:Olivella | smooth |