I. papillifer bulbosus (Marcus, 1928) is supressed due to lack of significant differences between the putative subspecies and the nominal subspecies. (Gasiorek et al. 2019)
Guidetti, R.; McInnes, S.J.; Kristensen, R.M. (2024). World List of Tardigrada. Isohypsibius papillifer (Murray, 1905). Accessed at: https://marinespecies.org/tardigrada/aphia.php?p=taxdetails&id=343187 on 2024-08-14
original description(ofMacrobiotus papillifer Murray, 1905)Murray, J. (1905). The Tardigrada of the Scottish Lochs. <em>Transactions of the Royal Society of Edinburgh.</em> [details]