Holotype: GIUS 4−439 Śni./917/1

Diagnoza

Articular surfaces of arm vertebra are rectangular, the wings are oval. Spines have frilled edges.

Porównanie

The species differs from Furcaster cataphractus Boczarowski, 2001 in having a large wedge−shaped convexity on the aboral surface of the mouth angle plate, an oval wing developed distally, and a cigar−shaped aboral groove on its arm vertebra. Furthermore, lateral plates are covered by circular, crescent−shaped depressions. It differs from the other species in the structural details of all the elements, chiefly of spines and scales. The spines have many thorns. In contrast to this species, scales of Carboniferous species do not have one side smooth. It differs from Furcaster separatus Haude, 1995 from the Early Devonian of the Argentinian Precordillera by the sculpture of the lateral surface of arm vertebra and, most probably,by structure of its scales and spines; the other elements are too poorly preserved to be compared.

Autekologia

Występowanie geograficzne

Outcrop I, II at Śniadka, outcrop III at Śniadka and Set XXVof the Skały Beds at Skały, Holy Cross Mountains, Poland

Zasięg czasowy

Late Eifelian and Early Givetian.

Materiały muzealne

Holotype GIUS 4−439 Śni./917/1 and ca. 1500 specimens.

Literatura

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