†subfamily Plectorthinae Schuchert and Le Vene 1929 (lamp shell)
Rhynchonellata - Orthida - Plectorthidae
Parent taxon: Plectorthidae according to A. W. Owen and D. A. T. Harper 1982
See also Mitchell 1977, Phleger 1933, Potter 1990, Rõõmusoks 1964 and Wright 1964
Sister taxa: Apollonorthis, Ashinaorthis, Atlantida, Corineorthis, Desmorthis, Doleroides, Hebertella, Irhirea, Lipanorthis, Mimella, Nanorthis, Oligorthis, Orthostrophiinae, Paterorthis, Platystrophiinae, Platystrophinae, Plectorthis, Pseudomimella, Schizophorella, Severginella
Subtaxa: Kujanorthis
Ecology: stationary epifaunal suspension feeder
Distribution:
• Ordovician of Kazakhstan (7 collections)
Total: 7 collections each including a single occurrence