Artiopoda - Trinucleida - Trinucleidae
Parent taxon: Trinucleidae according to A. W. Owen and D. A. T. Harper 1982
See also Harrington and Leanza 1957 and Whittington 1941
Sister taxa: Anebolithus, Auritolithus, Bergamia, Bettonolithus, Botrioides, Costonia, Cryptolithoides, Cryptolithus, Deanaspis, Decordinaspis, Eirelithus, Famatinolithus, Furcalithus, Guandacolithus, Gymnostomix, Hanchungolithinae, Hanchungolithus, Incaia, Jianxilithus, Lloydolithus, Lordshillia, Marekolithus, Marrolithinae, Marrolithoides, Marrolithus, Myinda, Myindella, Myttonia, Nankinolithus, Ningkianolithus, Novaspis, Onnia, Paratretaspis, Paratrinucleus, Parkesolithus, Protolloydolithus, Reedolithus, Reuscholithus, Salterolithus, Stapeleyella, Telaeomarrolithus, Tretaspidinae, Trinucleinae, Trinucleus, Whittardolithus, Xiushuilithus, Yinpanolithus
Subtaxa: Broeggerolithus
Ecology: fast-moving low-level epifaunal suspension feeder
Distribution:
• Ordovician of Ireland (3 collections), Norway (5), the United Kingdom (32)
Total: 40 collections including 48 occurrences