†Kirkidium (Kirkidium) Amsden et al. 1967 (lamp shell)
Rhynchonellata - Pentamerida - Pentameridae
Parent taxon: Kirkidium according to Amsden et al. 1967
Sister taxa: Kirkidium (Bateridium), Kirkidium (Pinguaella), Kirkidium sculptum
Subtaxa: Kirkidium (Kirkidium) knighti
Type: Pentamerus knightii
Ecology: stationary epifaunal suspension feeder
Distribution:
• Niagaran of United States (1: Indiana collection)
• Silurian of Canada (10: Northwest Territories, Quebec), China (2), Lithuania (4), the Russian Federation (1), Sweden (5), Ukraine (1), the United Kingdom (3), United States (2: Alaska)
Total: 29 collections each including a single occurrence