A catalogue of the nematode slide collection from the late W. L. Nicholas held at National Research Collections Australia, CSIRO Author Khudhir, Manda 0009-0004-8012-5643 National Research Collections Australia, CSIRO, GPO Box 1700 Canberra ACT 2601 Australia manda. khudhir @ csiro. au; https: // orcid. org / 0009 - 0004 - 8012 - 5643 manda.khudhir@csiro.au Author Hodda, Mike 0009-0004-8012-5643 National Research Collections Australia, CSIRO, GPO Box 1700 Canberra ACT 2601 Australia manda. khudhir @ csiro. au; https: // orcid. org / 0009 - 0004 - 8012 - 5643 & https: // orcid. org / 0009 - 0006 - 8568 - 8473 manda.khudhir@csiro.au Author Nicholas, Evelyn 274 Duffy St, Ainslie ACT 2602 Australia Author Campbell, Jennifer 0009-0004-8012-5643 National Research Collections Australia, CSIRO, GPO Box 1700 Canberra ACT 2601 Australia manda. khudhir @ csiro. au; https: // orcid. org / 0009 - 0004 - 8012 - 5643 manda.khudhir@csiro.au Author Nicholas, Warwick L. 0009-0004-8012-5643 National Research Collections Australia, CSIRO, GPO Box 1700 Canberra ACT 2601 Australia manda. khudhir @ csiro. au; https: // orcid. org / 0009 - 0004 - 8012 - 5643 & Deceased. This paper is offered based on discussions over many years, as a final tribute to a long career of collecting, and a strongly expressed desire to see these collections documented Corresponding author & National Research Collections Australia, CSIRO, GPO Box 1700 Canberra ACT 2601 Australia manda. khudhir @ csiro. au; https: // orcid. org / 0009 - 0004 - 8012 - 5643 manda.khudhir@csiro.au text Zootaxa 2023 2023-12-15 5388 1 1 109 https://mapress.com/zt/article/download/zootaxa.5388.1.1/52483 journal article 10.11646/zootaxa.5388.1.1 1175-5334 10390008 9FA0CF0D-BDED-49D1-8B2C-622681E1BA0B Actinonema celtica Boucher, 1976 Tomakin, NSW. Littoral Sand substrate. 3 males ; 5 females ; 3 juveniles . 7.5.86