Diagnoza

Interradial and radial elements of the calcareous ring with a ruff on their outer proximal edges, adjoining and surrounding the proximal processes.

Porównanie

A. tuto differs from other species of the genus by the presence of a high ruff, the edges of proximal processes passing over the inner surface and by details of the lateral surface connecting particular calcareous ring elements.

Autekologia

Występowanie geograficzne

Zbrza and set VIII of the Grzegorzowice Beds at Grzegorzowice, Holy Cross Mountains, Poland.

Zasięg czasowy

Early Eifelian: brachiopod Chimaerothyris dombrowiensis Zone (Polygnathus partitus Zone).

Materiały muzealne

Holotype GIUS 4−615 Grz./427/5 and > 1006 specimens.

Literatura

Boczarowski, A. 2001. Isolated sclerites of Devonian non-pelmatozoan echinoderms. Palaeontologia Polonica 59: 3–220.