.Specimen GIUS 4−618 Grz./372/1 from Earliest Eifelian Chimaerothyris dombrowiensis horizon, set VIII of Grzegorzowice

Holotype sclerite with four pores in the central zone, three additional pores, and crenulation, GIUS 779 Zba./358/1; Earliest Eifelian Chimaerothyris dombrowiensis horizon, Holy Cross Mountains; outer and inner view.

Diagnoza

Sclerites with doubled marginal girdle, internally serrated along their entire length when mature.

Porównanie

The species differs from all the others by its doubled and wholly serrated marginal ring.

Autekologia

Występowanie geograficzne

Zbrza; set VIII of the Grzegorzowice Beds at Grzegorzowice, Holy Cross Mountains; borehole Ogrodzieniec IG 2 (1269,4 m, 1119,7 m), Cracow Upland, Poland.

Zasięg czasowy

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

Materiały muzealne

Holotype GIUS 4−779 Zba./358/1 and 41 specimens.

Literatura

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