ammonites
Caucasoproductus dichotomocostatus Licharew 1937 (lamp shell)

Strophomenata - Productida - Productellidae

Alternative combination: Productus dichotomocostatus

Full reference: B. Licharew. 1937. Brachiopoda of the Permian system of USSR, Fasc. I. Permian Brachiopoda of north Caucasus, families Chonetidae Hall et Clarke and Productidae Gray. Paleontology of USSR Monographs 39:1-151

Belongs to Caucasoproductus according to W. H. He et al. 2009

Sister taxon: Caucasoproductus primoricus

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 6.41 x 8.74, valve 10.7 x 14.5