Sclerite GIUS 4−790 Tud./502/2, Mid (Late?) Frasnian, Tudorów

Diagnoza

Tear-shaped or polygonal pores arranged in form of a cross in the sclerite centre.

Porównanie

They differ from the typical sclerites of Calclamna by their rounded, regular shape and by heaving tear-shaped pores, whose arrangement resembles that in other species of Priscocaudina in having smaller pores located near the sclerite margin.

Autekologia

Występowanie geograficzne

Only known from the type locality.

Zasięg czasowy

Mid (Late?) Frasnian, early Palmatolepis hassi to late Palmatolepis rhenana Zones

Materiały muzealne

Holotype GIUS 4−791 Tud./502/17 and 249 sieve plates.

Literatura

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