†Isophragma extensum tricostatum Williams 1962 (lamp shell)
Strophomenata - Strophomenida - Plectambonitidae
Full reference: A. Williams. 1962. The Barr and lower Ardmillan series (Caradoc) of the Girvan District, south-west Ayrshire, with descriptions of the Brachiopoda. Memoir - Geological Society of London 3:1-267
Belongs to Isophragma extensum according to Y. Candela and D. A. T. Harper 2014
See also Williams 1962
Sister taxa: none
Type specimen: BB.27545, a shell
Ecology: stationary epifaunal suspension feeder
Distribution: there are no occurrences of Isophragma extensum tricostatum in the database