Concavocycloides frasniensis Boczarowski, 2001
Sugerowana cytacja: Gryz, P. 2020. Concavocycloides frasniensis Boczarowski 2001. Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/view/Species/Concavocycloides+frasniensis)
Diagnoza Marginals with large, rectangular wings. Apertures always with two clearly marked facet canals on the ventral side which open into a weakly to strongly marked crown lacking a central depression. Apertures at the centre of the crown are either irregular or in a meandering arrangement. Porównanie This species is the most advanced in its lineage with the largest wings. The diversified sculpture of its dorsal surface is characteristic and unique. Autekologia Występowanie geograficzne Only known from the type locality. Zasięg czasowy Middle Frasnian, early Palmatolepis hassi to early Palmatolepis rhenana Zones. Materiały muzealne Holotype: GIUS 4−610 Szg./548/2 and 8 specimens Literatura Boczarowski, A. 2001. Isolated sclerites of Devonian non-pelmatozoan echinoderms. Palaeontologia Polonica 59: 3-220.  | 
  |