Acta Palaeontologica Polonica

Redescription of the original collection of Zaphrentis calyculus Miller, 1881, Rugosa

Jerzy Fedorowski

Acta Palaeontologica Polonica 34 (4), 1989: 275-325

The type material of the Tournaisian Zaphrentis calyculus from the Miller's (1891) collection, redescribed by Easton (1944) has been re-investigated. The better preserved specimens are assigned to 5 species and 5 genera (among them Rotiphyllum diutinum sp. n., Petraria (?) milleri sp. n. and Patularima gen. n. Some forms are described in open nomenclature. The taxa are discussed in terms of morphology, ontogeny, intraspecific variability and relationships. Environmental and/or genetic control of straight, widely-flaring and horn shapes and of stereoplasmic infilling is discussed.

Key words: Rugosa, morphology, ontogeny, taxonomy, environment, Carboniferous, Tournaisian.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (for details please see, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.