Morphology and micro structure of oligo lamellar teeth in paleozoic echinoids 1. teeth of some early lepidocentrid echinoids

Jesionek-Szymanska, W.

Acta Palaeontologica Polonica 24(2): 275-294


ISSN/ISBN: 0567-7920
Accession: 005932690

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The oligolamellar, flat type of echinoid teeth in KONGIELECHINUS magnituberculatus gen. et sp. nov. is described. The teeth consist of few relatively large, thick, roughly triangular lamellae. Re-interpretation of the teeth structure of the oldest known echinoids - Upper Ordovician Aulechinus and Ectinechinus is presented. Their teeth also belong to the flat, oligolamellar type and hae been wrongly assigned to the grooved type. K. magnituberculatus from the Givetian (Middle Devonian) of Poland is described on the basis of isolated coronal plates, spines and Aristotle lantern elements.