Entobia paradoxa (Fischer, 1868)

Description: Camerate system of surface and closely subsurface borings compоsed of the horizontal net of exploratory threads and irregular chambers, very broadly of oval, often even amoebic form. Numerous apophyses extend from the surface of chambers in all directions. The growth phases A and B are represented by a very dense labyrinth of exploratory threads, locally inflating into embryos of chambers (Pl. VII, fig.3, on the left). Phases C and D are shown as chambers contacting one another or joined by short threads or by longer, thicker intercameral channels (Pl. VII, fig. 3; in the centre). Some neighbouring chambers unify, constituting bizarre formations (Pl. VII, fig. 2; in the centre). Phase E is lacking. The usual size of chambers is 1-3 mm, the size of the whole systems 10-40 mm.