1970s

• Guiry, M.D. 1974. A preliminary consideration of the taxonomic position of Palmaria palmata (Linnaeus) Stackhouse = Rhodymenia palmata (Linnaeus) Greville. Journal of the Marine Biological Association of the United Kingdom 54: 509–528. Reference page. 

• Guiry, M.D. & Hollenberg, G.J. 1975. Schottera gen. nov. and Schottera nicaeensis (Lamour. ex Duby) comb. nov. (=Petroglossum nicaeense (Lamour. ex Duby) Schotter) in the British Isles. British Phycological Journal 10: 149–164, 15 figs. Reference page. 

• Guiry, M.D. & Irvine, L.M. 1976. A first record of the red alga Phyllophora sicula (Kützing) comb. nov. (P. palmettoides J. Agardh) from Ireland. Irish Naturalists' Journal 18: 284. Reference page. 

• Guiry, M.D. 1978. The importance of sporangia in the classification of the Florideophyceae. In: Modern Approaches to the Taxonomy of Red and Brown Algae. (Irvine, D.E.G. & Price, J.H. Eds) Vol.10, pp. 111–144. London: Academic Press. Reference page. 

1980s

• Irvine, D.E.G. & Guiry, M.D. 1980. Taxonomy of the Rhodymeniales. In: Taxonomy of Algae. Papers Presented at the International Symposium on Taxonomy of Algae held at the Centre of Advanced Study in Botany, University of Madras, December 9–16, 1974. (Desikachary, T.V. & Raja Rao, V.N. Eds), pp. 287–303. Madras: University of Madras. Reference page. 
• Guiry, M.D. 1982. Devaleraea, a new genus of the Palmariaceae (Rhodophyta) in the North Atlantic and North Pacific. Journal of the Marine Biological Association of the United Kingdom 62: 1–13.

• Guiry, M.D., West, J.A., Kim, D.-H. & Masuda, M. 1984. Reinstatement of the genus Mastocarpus Kützing (Rhodophyta). Taxon 33: 53–63. DOI: 10.2307/1222029 Reference page. 

• Maggs, C.A. & Guiry, M.D. 1985. Life history and reproduction of Schmitzia hiscockiana sp. nov. (Rhodophyta, Gigartinales) from the British Isles. Phycologia 24: 297–310. Reference page. 

• Maggs, C.A. & Guiry, M.D. 1988 '1987'. Gelidiella calcicola sp. nov. (Rhodophyta) from the British Isles and northern France. British Phycological Journal 22: 417–434. Reference page. 

• Millar, A.J.K. & Guiry, M.D. 1989. Morphology and life history of Predaea kraftiana sp. nov. (Gymnophloeaceae, Rhodophyta) from Australia. Phycologia 28: 409–421. Reference page. 

1990s

• Guiry, M.D. & Garbary, D.J. 1990. A preliminary phylogenetic analysis of the Phyllophoraceae, Gigartinaceae and Petrocelidaceae (Rhodophyta) in the North Atlantic and the North Pacific. In: Evolutionary Biogeography of the Marine Algae of the North Atlantic. (Garbary, D.J. & South, G.R. Eds), pp. 265–290. Berlin: Springer-Verlag. Reference page. 

• Guiry, M.D. & Womersley, H.B.S. 1993. Capreolia implexa gen. et sp. nov. in Australia and New Zealand (Gelidiales, Rhodophyta); an intertidal red alga with an unusual life history. Phycologia 32: 266–277. Reference page. 

• Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium 14: 105–120, 41 figs. Reference page. 

• Womersley, H.B.S. & Guiry, M.D. 1994. Order Gelidiales Kylin 1923: 132. In: The marine benthic flora of southern Australia. Part IIIA. Bangiophyceae and Florideophyceae (Acrochaetiales, Nemaliales, Gelidiales, Hildenbrandiales and Gigartinales sensu lato). (Womersley, H.B.S. Eds), pp. 118–142. Canberra: Australian Biological Resources Study. online Reference page. 

• Masuda, M. & Guiry, M.D. 1995 '1994'. The reproductive morphology of Platoma cyclocolpum (Nemastomataceae, Gigartinales) from Gran Canaria, Canary Islands. Cryptogamie, Algologie 15: 191–212. Reference page. 

• Masuda, M. & Guiry, M.D. 1995. Reproductive morphology of Itonoa marginifera (J. Agardh) gen. et comb. nov. (Nemastomataceae, Rhodophyta). European Journal of Phycology 30: 57–67, 22 figs, 1 table. DOI: 10.1080/09670269500650801 Reference page. 

2000s

• Rindi, F., López-Bautista, J.M., Sherwood, A.R. & Guiry, M.D. 2006. Morphology and phylogenetic position of Spongiochrysis hawaiiensis gen. et sp. nov., the first known terrestrial member of the order Cladophorales (Ulvophyceae, Chlorophyta). International Journal of Systematic and Evolutionary Microbiology 56(4): 913–922. DOI: 10.1099/ijs.0.63977-0 PDF Reference page. 

• Wilkes, R.J., McIvor, L. & Guiry, M.D. 2006. Vegetative morphology and rbcL phylogeny of some members of the genera Botryocladia and Irvinea (Rhodymeniaceae, Rhodophyta). Phycologia 45: 481–494. Reference page. 
• Kim, J.H., Guiry, M.D., Oak, J.H., Choi, D.-S., Kang, S.-H., Chung, H. & Choi, H.-G. 2007. Phylogenetic relationships within the tribe Janieae (Corallinales, Rhodophyta) based on molecular and morphological data: a reappraisal of Jania. Journal of Phycology 43: 1310–1319. DOI: 10.1111/j.1529-8817.2007.00410.x
• Guiry, M.D. & Selivanova, O.N. 2007. Masakiella, nom. nov. pro Masakia N.G. Klochkova (Corallinaceae, Rhodophyta), non Masakia (Nakai) Nakai (Celastraceae, Tracheophyta). Phycologia 46: 235–236. DOI: 10.2216/06-37.1

• Choi, H.-G., Kraft, G.T., Kim, H.-S., Guiry, M.D. & Saunders, G.W. 2008. Phylogenetic relationships among lineages of the Ceramiaceae (Ceramiales, Rhodophyta) based on nuclear small subunit rDNA sequence data. Journal of Phycology 44: 1033–1048. DOI: 10.1111/j.1529-8817.2008.00554.x Reference page. 

2010s

• Guiry, M.D. 2012. A catalogue of Irish seaweeds. pp. [1]–250, 1 pl. Ruggell: A.R.G. Gantner Verlag K.G. 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. 

• Ruggiero, M.A., Gordon, D.P., Orrell, T.M., Bailly, N., Bourgoin, T., Brusca, R.C., Cavalier-Smith, T., Guiry, M.D. & Kirk, P.M. 2015. A Higher Level Classification of All Living Organisms. PLoS ONE 10(4): e0119248 DOI: 10.1371/journal.pone.0119248 . [Correction in 10(6): e0130114 DOI: 10.1371/journal.pone.0130114 .] Reference page. 
• Brodie, J., Wilbraham, J., Pottas, J. & Guiry, M.D. 2016. A revised check-list of British seaweeds. Journal of the Marine Biological Association of the United Kingdom 96(5): 1005–1029. DOI: 10.1017/S0025315415001484

• Guiry, M.D. 2017. Validation of some invalid names for green algae introduced by P.J.L. Dangeard. Notulae Algarum 42: 1–2, no figs. PDF Reference page. 

• Kamiya, M., Lindstrom, S.C., Nakayama, T., Yokoyama, A., Lin, S.-M., Guiry, M.D., Gurgel, F.D.G., Huisman, J.M., Kitayama, T., Suzuki, M., Cho, T.O. & Frey, W. 2017. Rhodophyta. In: Syllabus of Plant Families, 13th ed. Part 2/2: Photoautotrophic eukaryotic Algae. (Frey, W. Eds), pp. [i]–xii, [1]–171. Stuttgart: Borntraeger Science Publishers. ISBN 978-3-443-01094-2. Reference page. 

• Rossignolo, N.L., Necchi, O., Jr. & Guiry, M.D. 2017. Atrophycus, a new genus name for “Setacea (De Toni) Necchi & Rossignolo” . Notulae Algarum 26: 1–2, no figs. Reference page. 

• Huisman, J.M. & Guiry, M.D. 2017. Validation of the names Antithamnion subcorticatum Itono and Balliella subcorticata (Itono) Itono & Tak.Tanaka (Ceramiales, Rhodophyta). Notulae Algarum 33: 1–2. Reference page. 

database:

• Guiry, M.D. & Guiry, G.M. 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org