| Singular | Plural | |
|---|---|---|
| Nominativ | circumfossura | circumfossurae |
| Genitiv | circumfossurae, circumfossurai | circumfossurarum |
| Dativ | circumfossurae, circumfossurai | circumfossuris, circumfossurabus |
| Akkusativ | circumfossuram | circumfossuras |
| Ablativ | circumfossurad, circumfossura | circumfossuris, circumfossurabus |
| Vokativ | circumfossura | circumfossurae |