†subfamily Nucleatulinae Muir-Wood 1965 (lamp shell)

Rhynchonellata - Terebratulida - Dielasmatidae

Parent taxon: Dielasmatidae according to A. Williams et al. 2006

Sister taxa: Campbellelasma, Centronelloideinae, Dielasmatinae, Grigorjevaelasma, Gruntelasma, Lengwuella, Ustritskia

Subtaxa: Arctothyris Dinarella Nucleatula Propygope Sulcatothyris

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Type: Nucleatula

Ecology: stationary low-level epifaunal suspension feeder

Distribution:

• Triassic of China (2 collections), Romania (1), the Russian Federation (2)

Total: 5 collections each including a single occurrence

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