†family Dimegelasmidae Carter 1994 (lamp shell)
Rhynchonellata - Spiriferinida - Dimegelasmidae
Parent taxon: Syringothyridoidea according to A. Williams et al. 2006
Sister taxa: Licharewiidae, Syringothyrididae
Subtaxa: Dimegelasma Guilinospirifer Zeugopleura
Type: Dimegelasma
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Carboniferous of Canada (1: Yukon collection), China (1), United States (31: California, Idaho, Illinois, Indiana, Kentucky, Missouri, Montana, Nevada, New Mexico, Utah, Washington, Oregon, Idaho, Montana, Nevada, Utah, California)
• Devonian of China (2)
Total: 35 collections including 37 occurrences