†Isorthis (Isorthis) Kozlowski 1929 (lamp shell)
Rhynchonellata - Orthida - Dalmanellidae
Parent taxon: Isorthis according to Kozlowski 1929
Sister taxa: Isorthis (Arcualla), Isorthis (Ovalella), Isorthis (Protocortezorthis), Isorthis alpha, Isorthis bailyi, Isorthis crassa, Isorthis estona, Isorthis festiva, Isorthis loveni, Isorthis mediocra, Isorthis parvulus, Isorthis pygmaea, Isorthis slitensis
Subtaxa: Isorthis (Isorthis) szajnochai
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of the Czech Republic (2 collections), Kazakhstan (1), Ukraine (3)
• Silurian of Mongolia (1)
Total: 7 collections each including a single occurrence