1962  Gastrioceras (Branneroceras) branneri branneri.-Kullmann: 86, pl.2 fig.1.
      ----    Gastrioceras (Branneroceratoides) tetragonum Kullmann: 88, pl.2 fig.2.
     1971  Entogonites tetragonus.-Ruzhentsev & Bogoslovskaia: 37.
     2010  Entogonites tetragonus.-Korn et al.: 361, fig.5.

Holotype SLM 4063/38 Beograd .

Fossils regarded as belonging to this horizon most probably loose, therefore age uncertain. Section reversed by tectonic movements, overlain by Pennsylvanian pelagic sediments. Maybe from layers above limestone olistolith.

  Overlaying strata above olistolith block, lower Serpukhovian in age. Age of Podolskian olisthostrome of Druzetic not precisely determined, may contain partly Upper Devonian, Mississippian, Bashkirian, lower Moscovian. Compare: I. Filipovic, The Carboniferous of Northeastern Serbia, Mémoires du Service Géologique "Gemini", tome 25, Beograd 1995, edited by Ivan Filipovic, Beograd. 1995, p.6, see section: LOC7332.

Entogonites tetragonus is similar to E. grimmeri, early whorls less tetragonal, but maybe its junior synonym.