Species
Isorthis slitensis Walmsley, 1965
Synonyymit
1965 Isorthis slitensis — Walmsley , pp. 467, fig. 62:23-25
1967 Protocortezorthis slitensis (Walmsley) — Johnson & Talent , pp. 155
1974 Isorthis slitensis Walmsley, 1965 — Bassett & Cocks , pp. 10
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Orthida |
| Suborder | Dalmanellidina |
| Superfamily | Dalmanelloidea |
| Family | Dalmanellidae |
| Subfamily | Isorthinae |
| Genus | Isorthis |
| Species | crassa |
| estona | |
| loveni | |
| mediocra | |
| ovalis | |
| parvulus | |
| slitensis |