Ambulacral plate from oral part of Meekechinus sp. A test with the auricle, GIUS 4−587 Mrz./982/1; Late Givetian of Marzysz, Holy Cross Mountains, samples Marzysz II/15; outer view and inner view.

Ambulacral plates GIUS 4−584 Mrz./853b/12, Late Givetian of Marzysz II/13, outer view.

Diagnoza

Porównanie

The occurrence of numerous rows of imbricating ambulacral plates is characteristic for the family. Many interambulacral plates lack tubercles, as typical of Echinocystitoida, where plates without tubercles form an inner interambulacral belt.

Autekologia

Występowanie geograficzne

Outcrop I, trench II at Marzysz; set A of Wietrznia II, Holy Cross Mountains, Poland

Zasięg czasowy

Late Givetian

Materiały muzealne

GIUS > 2500 specimens

Literatura

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