ammonites
Dalmanella testudinaria Walker 1982 (lamp shell)

Rhynchonellata - Orthida - Dalmanellidae

Full reference: L. G. Walker. 1982. The brachiopod genera Hebertella, Dalmanella, and Heterorthina from the Ordovician of Kentucky. U.S. Geological Survey Professional Paper 1066M:1-17

Belongs to Dalmanella according to L. G. Walker 1982

Sister taxa: Dalmanella bassleri, Dalmanella fertilis, Dalmanella frechi, Dalmanella meeki, Dalmanella multisecta, Dalmanella subquadrata, Dalmanella sulcata

Ecology: stationary epifaunal suspension feeder