1990s

• Nelson, W.A.; Adams, N.M. 1990: A new species of Porphyra (Bangiales, Rhodophyta) from the Three Kings Islands, northern New Zealand. Botanica marina 33(1): 3–7. DOI: 10.1515/botm.1990.33.1.3 . Reference page. 

• Nelson, W.A., Adams, N.M. & Hay, C.H. 1991. Marine algae of the Chatham Islands. National Museum of New Zealand Miscellaneous Series 23: 1–58, 3 figs. Reference page. 

• Nelson, W.A. 1993: Epiphytic species of Porphyra (Bangiales, Rhodophyta) from New Zealand. Botanica marina 36(6): 525–534. DOI: 10.1515/botm.1993.36.6.525 . Reference page. 

• Nelson, W.A. & Adams, N.M. 1993. Nesophila hoggardii gen. et sp. nov. (Rhizophyllidaceae, Rhodophyta) from offshore islands of northern New Zealand. Museum of New Zealand Records 1(1): 1–7. Reference page. 

• Phillips, J.A. & Nelson, W.A. 1998. Typification of the Australasian brown alga Zonaria turneriana J. Agardh (Dictyotales) and description of the endemic New Zealand species, Zonaria aureomarginata sp. nov. Botanica Marina 41: 77–86, 20 figs, 2 tables. Reference page. 
• Nelson, W.A. 1999. Landsburgia ilicifolia (Cystoseiraceae, Phaeophyta), a new deep-water species endemic to the Three Kings Islands, New Zealand. New Zealand Journal of Botany 37(4): 727–730.
• Nelson, W.A. 1999. Marginiella parsonsii (Seiorococcaceae, Phaeophyta), a new species from the Bounty and Antipodes Islands, southern New Zealand. New Zealand Journal of Botany 37: 731–735.

• Nelson, W.A., Knight, G.A. & Falshaw, R. 1999. A new agarophyte, Curdiea balthazar sp. nov. (Gracilariales, Rhodophyta), from the Three Kings Islands, northern New Zealand. Proceedings of the International Seaweed Symposium 16. Hydrobiologia 398: 57–63. DOI: 10.1023/A:1017013530022 Reference page. 

2000s

• Nelson, W.A., Broom, J.E., Farr, T.J. 2001. Four new species of Porphyra (Bangiales, Rhodophyta) from the New Zealand region described using traditional characters and 18S rDNA sequence data. Cryptogamie algologie, 22(3): . DOI: 10.1016/S0181-1568(01)01060-1 Reference page. 

• Millar, A.J.K. & Nelson, W.A. 2002. Nancythalia humilis gen. et sp. nov. and Abroteia suborbiculare (Delesseriaceae, Rhodophyta) from New Zealand. Phycologia 41: 245–253. Reference page. 

• Nelson, W.A., Broom, J.E. & Farr, T.J. 2003. Pyrophyllon and Chlidophyllon (Erythropeltidales, Rhodophyta): two new genera for obligate epiphytic species previously placed in Porphyra, and a discussion of the orders Erythropeltidales and Bangiales. Phycologia 42: 308–315. DOI: 10.2216/i0031-8884-42-3-308.1 Reference page. 

• Nelson, W.A., Farr, T.J. & Broom, J.E.S. 2005. Dione and Minerva, two new genera from New Zealand circumscribed for basal taxa in the Bangiales (Rhodophyta). Phycologia 44: 139–145. DOI: 10.2216/0031-8884(2005)44[139:DAMTNG]2.0.CO;2 Reference page. 

• D’Archino, R. & Nelson, W.A. 2006. Marine brown algae introduced to New Zealand waters: first record of Asperococcus ensiformis (Phaeophyta, Ectocarpales, Chordariaceae). New Zealand journal of marine and freshwater research, 40(4): 599–604. DOI: 10.1080/00288330.2006.9517448 Reference page. 
• Lin, S.-M., Hommersand, M.H. & Nelson, W.A. 2007. An assessment of Haraldiophyllum (Delesseriaceae, Rhodophyta), including H. crispatum (J.D. Hooker et Harvey) comb. nov. from New Zealand based on rbcL and LSU sequence analysis and morphological evidence. European Journal of Phycology 42(4): 391–408.

• Russell, L.K., Hurd, C.L., Nelson, W.A. & Broom, J.E. 2009. An examination of Pachymenia and Aeodes (Halymeniaceae, Rhodophyta) in New Zealand and the transfer of two species of Aeodes in South Africa to Pachymenia. Journal of Phycology 45: 1389–1399. DOI: 10.1111/j.1529-8817.2010.00811.x Reference page. 

2010s

• D'Archino, R., Nelson, W.A., & Zuccarello, G.C. 2010. Psaromenia (Kallymeniaceae, Rhodophyta): a new genus for Kallymenia berggrenii. Phycologia 49(1): 73–85. DOI: 10.2216/08-29.1 Reference page. 

• Hommersand, M.H., Leister, G.L., Ramirez, M.E, Gabrielson, P.W. & Nelson, W.A. 2010. A morphological and phylogenetic study of Glaphyrosiphon gen. nov (Halymeniaceae, Rhodophyta) based on Grateloupia intestinalis with descriptions of two new species: Glaphyrosiphon lindaueri from New Zealand and Glaphyrosiphon chilensis from Chile. Phycologia 49(6): 554–573. DOI: 10.2216/09-106.1 Reference page. 

• Kim, M.S., Kim, S.Y. & Nelson, W. 2010. Symphocladia lithophila sp. nov. (Rhodomelaceae, Ceramiales), a new Korean red algal species based on morphology and rbcL sequences. Botanica Marina 53(3): 233–241. Reference page. 

• Lin, S-M.; Nelson, W.A. 2010. Systematic revision of the genus Phycodrys (Delesseriaceae, Rhodophyta) from New Zealand, with the descriptions of three new species, P. novae-zelandiae sp. nov., P. franiae sp. nov. and P. adamsiae sp. nov. European journal of phycology 45(2): 200–214. DOI: 10.1080/09670260903540847 Reference page. 

• Russell, L.K., Hurd, C.L., Nelson, W.A. & Broom, J.E. 2010. Corrigendum: An examination of Pachymenia and Aeodes (Halymeniaceae, Rhodophyta) in New Zealand and the transfer of two species of Aeodes in South Africa to Pachymenia (45: 1389–99). Journal of Phycology 46(2): 414. Reference page. 

• Tanaka, A., Uwai, S., Nelson, W. & Kawai, H. 2010. Phaeophysema gen. nov. and Vimineoleathesia gen. nov., new brown algal genera for the minute Japanese members of the genus Leathesia. European Journal of Phycology 45(1): 107–115. Reference page. 

• Boo, S.M., Lee, K.M., Cho, G.Y. & Nelson, W. 2011. Colpomenia claytonii sp. nov. (Scytosiphonaceae, Phaeophyceae) based on morphology and mitochondrial cox3 sequences. Botanica Marina 54(2): 159–167. Reference page. 

• D’Archino, R., Nelson, W.A. & Zuccarello, G.C. 2011. Diversity and complexity in New Zealand Kallymeniaceae (Rhodophyta): recognition of the genus Ectophora and description of E. marginata sp. nov. Phycologia 50(3): 241–255. DOI: 10.2216/10-14.1 Reference page. 

• Sutherland, J.E., Lindstrom, S.C., Nelson, W.A., Brodie, J., Lynch, M.D., Hwang, M.S., Choi, H.-G., Miyata, M., Kikuchi, N., Oliveira, M.C., Farr, T., Neefus, C., Mols-Mortensen, A., Milstein, D. & Müller, K.M. 2011. A new look at an ancient order: generic revision of the Bangiales (Rhodophyta). Journal of phycology, 47(5): 1131-1151. DOI: 10.1111/j.1529-8817.2011.01052.x Reference page. 
• Nelson, W.A., Leister, G.L. & Hommersand, M.H. 2011. Psilophycus alveatus gen. et comb. nov., a basal taxon in the Gigartinaceae (Rhodophyta) from New Zealand. Phycologia, 50(3): 219–231. DOI: 10.2216/10.38.1 [corrigendum in Phycologia, 51(1): 118. (2012) DOI: 10.2216/0031-8884-51.1.118 ]

• Rodriguez-Prieto, C., Lin, S.-M., Nelson, W.A. & Hommersand, M.H. 2011. Developmental morphology of Sarcodia montagneana and S. grandifolia from New Zealand and a phylogeny of Sarcodia (Sarcodiaceae, Rhodophyta) based on rbcL sequence analysis. European Journal of Phycology 46(2): 153–170. DOI: 10.1080/09670262.2011.580198 Reference page. 

• Nelson, W.A. 2012: 22. Phylum Rhodophyta: red algae. Pp. 327-346 in: Gordon, D.P. (ed.) 2012. New Zealand inventory of biodiversity. Volume 3. Kingdoms Bacteria, Protozoa, Chromista, Plantae, Fungi. Canterbury University Press, Christchurch, New Zealand. Reference page.  Reference page. 

• D'Archino, R., Nelson, W.A. & Zuccarello, G.C. 2012. Stauromenia australis, a new genus and species in the family Kallymeniaceae (Rhodophyta) from southern New Zealand. Phycologia 51(4): 451–460. DOI: 10.2216/11-87.1 . Reference page. 

• Lin, S.-M., Nelson, W.A. & Hommersand, M.H. 2012. Hymenenopsis heterophylla gen. et sp. nov. (Delesseriaceae, Rhodophyta) from New Zealand, based on a red alga previously known as Hymenena palmata f. marginata sensu Kylin, with emphasis on its cystocarp development. Phycologia, 51(1): 62–73. DOI: 10.2216/11-38.1 . Reference page. 

• Kim, S.Y., Nelson, W.A. & Kim, M.S. 2012. A reappraisal of Symphyocladia (Rhodomelaceae, Rhodophyta), including a new species based on morphology and molecular data. Phycologia 51(5): 531–541. DOI: 10.2216/11-62.1 Reference page. 

• Nelson, W.A. 2013: Pyropia plicata sp. nov. (Bangiales, Rhodophyta): naming a common intertidal alga from New Zealand. PhytoKeys 21: 17–28. DOI: 10.3897/phytokeys.21.4614 Reference page. 

• Nelson, W.A.; Dalen, J.; Neill, K.F. 2013: Insights from natural history collections: analysing the New Zealand macroalgal flora using herbarium data. PhytoKeys 30: 1–21. DOI: 10.3897/phytokeys.30.5889 Reference page. 

• Nelson, W.A. & D’Archino, R. 2014. Three new macroalgae from the Three Kings Islands New Zealand including the first southern Pacific Ocean record of the Furcellariaceae (Rhodophyta). Phycologia 53(6): 602–613, 48 fig. DOI: 10.2216/14-60R1.1 Reference page. 

• Nelson, W.A. & Dalen, J. 2014. Taxonomic notes on the New Zealand macroalgal flora: synonymic checklist of the red algal order Gracilariales with selection of lectotypes and description of a new species. New Zealand Journal of Botany 52(2): 236–244. DOI: 10.1080/0028825X.2013.856799 Reference page. 

• Nelson. W.A., Kim, S.Y. & Boo, S.M. 2014. Transfer of the subantarctic red alga Grateloupia aucklandica to the genus Glaphyrosiphon (Halymeniales, Rhodophyta). Phycologia 53(5): 457–462. DOI: 10.2216/14-017.1 Reference page. 

• D’Archino, R., Nelson, W.A. & Zuccarello, G.C. 2014. Amalthea and Galene, two new genera of Halymeniaceae (Rhodophyta) from New Zealand. Botanica marina 57(3): 185–201. DOI: 10.1515/bot-2014-0008 Reference page. 

• D’Archino, R., Nelson, W.A., Payri, C.E. & Zuccarello, G.C. 2015. Two new species of Platoma (Schizymeniaceae) from the western South Pacific Ocean. Phycologia 54(3): 307–315. DOI: 10.2216/14-113.1 Reference page. 

• D’Archino, R., Nelson, W., Yang, M.Y & Kim, M.S. 2015. New record of Hypnea flexicaulis in New Zealand and description of Calliblepharis psammophilus sp. nov.. Botanica Marina 58(6): 485–497. DOI: 10.1515/bot-2015-0053 Reference page. 

• Nelson, W.A., Sutherland, J.E., Farr, T.J., Hart, D.R., Neill, K.F., Kim, H.J. & Yoon, H.S. 2015. Multi-gene phylogenetic analyses of New Zealand coralline algae: Corallinapetra novaezealndiae gen. et sp. nov. and recognition of the Hapalidiales ord. nov. Journal of Phycology 51(3): 454–468. DOI: 10.1111/jpy.12288 Reference page. 

• Lin, S.-M., Rodríguez-Prieto, C., Huisman, J.M., Guiry, M.D., Payri, C., Nelson, W.A. & Liu, S.-L. 2015. A phylogenetic re-appraisal of the family Liagoraceae sensu lato (Nemaliales, Rhodophyta) based on sequence analyses of two plastid genes and post-fertilization development. Journal of Phycology 51(3): 546–559. DOI: 10.1111/jpy.12301 Reference page. 

• Lindstrom, S.C., Gabrielson, P.W., Hughey, J.R., Macaya, E.C. & Nelson, W.A. 2015. Sequencing of historic and modern specimens reveals cryptic diversity in Nothogenia (Scinaiaceae, Rhodophyta). Phycologia 54(2): 97–108. DOI: 10.2216/14-077.1 Reference page. 

• Nelson, W.A. & Sutherland, J.E. 2016. Predaea rosa sp. nov. (Nemastomatales, Rhodophyta): a cool-temperate species from southern New Zealand. Phycologia 56(2): 167–175, 11 fig. DOI: 10.2216/16-81.1 Reference page. 

• Yoon, H.S., Nelson, W., Lindstrom, S.C., Boo, S.M., Pueschel, C., Qiu, H. & Bhattacharya, D. 2016. Rhodophyta. pp. 1–45. In: Archibald, J.M., Simpson, A.G.B., Slamovits, C. (Eds.). Handbook of the Protists. Springer. DOI: 10.1007/978-3-319-32669-6_33-1 Reference page. 

• D’Archino, R., Nelson, W.A. & Sutherland, J.E. 2017. Neither Callophyllis nor Gelidium: Blastophyllis gen. nov. and Zuccarelloa gen. nov. (Kallymeniaceae, Rhodophyta) for three New Zealand species. Phycologia 56(5): 549–560, 34 fig. DOI: 10.2216/16-115.1 Reference page.