Palaeoscolecida - Cricocosmida - Palaeoscolecidae
Parent taxon: Cricocosmida according to J. Han et al. 2007
See also Kouchinsky et al. 2011, Skovsted 2006 and Smith 2015
Sister taxa: Maotianshaniidae, Tylotitidae
Subtaxa: Guanduscolex Hadimopanella Kaimenella Mafangscolex Palaeoscolex Radnorscolex Sahascolex Scathascolex Wronascolex
Ecology: facultatively mobile shallow infaunal carnivore
Distribution:
• Silurian of the United Kingdom (3 collections)
• Ordovician of the United Kingdom (1)
• Cambrian of Antarctica (1), Australia (6), China (45), Greenland (13), the Russian Federation (3), Türkiye (1), the United Kingdom (1), United States (2: Utah)
• Amgan of Kyrgyzstan (1), the Russian Federation (1)
• Solvan of the Russian Federation (1)
• Caerfai of China (2)
Total: 81 collections including 86 occurrences