Holotype marginal ossicles GIUS 4−575 Mrz./464/1 from the Late Givetian of Marzysz II/4 ; ventral and dorsal view.

Diagnoza

Marginals with indistinct radial duct pore; their laterally expanded wings blade−shaped.Crest and dorsal surface covered with pustules. 

Porównanie

The species is most closely related to Cyclocystoides latus Smith et Paul,1982, but the presence of the lateral strip and its narrow crest excludes it from that genus. It differs from the species of Concavocycloides in having a carved crest surface, very small radial duct hole and extended wings. Radials of Concavocycloides givetiensis Boczarowski, 2001 are well established and are of the thin−walled type. The massive structure of the marginals readily distinguishes thisfrom all the other species. The madreporite plate belongs to this species rather than to Concavocycloides givetiensis Boczarowski, 2001 due to its thickness and similarity of shape with radial plates.

Autekologia

Występowanie geograficzne

Only known from the type locality. 

Zasięg czasowy

Late Givetian, early Mesotaxis falsiovalis Zone. 

Materiały muzealne

Holotype GIUS 4−575 Mrz./464/1 and 5 specimens.

Literatura

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