Species
Ungula triangularis (Mickwitz, 1896)
Synonyymit
1969 Obolus (Obolus) triangularis Mickwitz, 1896 — Gorjansky , pp. 24, fig. 1:21,22
1993 Ungula inornata (Mickwitz, 1896) — Puura & Holmer , pp. 219
2013 Ungula triangularis (Mickwitz, 1896) — Lang & Puura , pp. 123
Aiheeseen liittyvät julkaisut
Gorjansky, V. J. 1969. Bezzamkovye brahiopody kembrijskih i ordovikskih otloženij severo-zapada Russkoj platformy. pp. 1-176. Nedra.
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Linguliformea |
| Class | Lingulata |
| Order | Lingulida |
| Superfamily | Linguloidea |
| Family | Obolidae |
| Subfamily | Obolinae |
| Genus | Ungula |
| Species | convexa |
| ingrica | |
| inornata | |
| triangularis |
Levinneisyys ja viitteet
- Gorjansky, 1969 Jägala River Pakerort Stage
- Gorjansky, 1969 Maardu opencast mine Pakerort Stage