JM Journal of Micropalaeontology JM J. Micropalaeontol. 2041-4978 GSL Publishing Göttingen, Germany 10.1144/jm.18.2.124 Designation of holotypes for new species of <i>Iapetonudus</i> Nicoll, Miller, Nowlan, Repetski and Ethington and <i>Iapetognathus</i> Landing Nicoll Robert S. 0 Miller James F. 1 Nowlan Godfrey S. 2 Repetski John E. 3 Ethington Raymond L. 4 Australian Geological Survey Organisation, GPO Box 378, Canberra, ACT 2601 Australia Department of Geography, Geology and Planning, Southwest Missouri State University, Springfield, Missouri, 65804-0089 USA Geological Survey of Canada, 3303 - 33 Street N.W., Calgary, Alberta T2L 2A7 Canada United States Geological Survey, MS 926A, National Center, Reston, Virginia 20192 USA Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211 USA 01 12 1999 18 2 124 124 Copyright: © 1999 Robert S. Nicoll et al. 1999 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://jm.copernicus.org/articles/18/124/1999/jm-18-124-1999.html The full text article is available as a PDF file from https://jm.copernicus.org/articles/18/124/1999/jm-18-124-1999.pdf

In the course of publication of a large manuscript on earliest Ordovician conodont species and their utility for biostratigraphy (Nicoll <i>et al</i>., 1999), an error occurred, resulting in the lack of designation of holotypes for the type species of the genus <i>Iapetonudus</i> and some new species of <i>Iapetognathus.</i> Herein, we remedy this error so that the originally published specimens are regarded as fully established holotypes rather than as syntypes in the future.<br/><br/>As the original authors of these species, we establish the following holotypes: For the species <i>Iapetognathus fluctivagus</i> Nicoll, Miller, Nowlan, Repetski and Ethington, we designate the Pa element illustrated on Pl. 11, fig. 6, USNM 498962. For the species <i>Iapetognathus jilinensis</i> Nicoll, Miller, Nowlan, Repetski and Ethington, we designate the Pa element illustrated as Pl. 14, fig. 4, USNM 498973. For the species <i>Iapetognathus landingi</i> Nicoll, Miller, Nowlan, Repetski and Ethington, we designate the Pa element illustrated as Pl. 20, fig. 3, USNM 498996. For the species <i>Iapetonudus ibexensis</i> Nicoll, Miller, Nowlan, Repetski and Ethington, we designate the Pa element illustrated as Pl. 23, fig. 3, USNM 499009.

 References R. S., Nicoll, J. F., Miller, G. S., Nowlan, J. E., Repetski and R. L., Ethington: <italic>Iapetonudus</italic> (N. gen.) and <italic>Iapetognathus</italic> Landing, unusual earliest Ordovician multielement conodont taxa and their utility for biostratigraphy, Brigham Young University Geology Studies, 44, 27-101, 1999.